Friday, 21 October 2016

A meeting of minds

In this week's #Build2Perform blog, we're getting a bonus word from CIBSE President John Field. As well as his regular Presidential blog, he's written for us about his thoughts ahead of the 3rd Building Performance Conference and Exhibition on 17th and 18th November - how it's relevant, how it ties into the future of building services, and why it's exciting!

As CIBSE President one of the biggest and most exciting honours that we get in the job is to preside over a CIBSE Conference. Now in its third year, the Conference is an opportunity to mingle with and hear from some of the biggest names in our industry and grapple with the big issues of the next few years. This year I’m also chairing the second day, in which we’ll be looking at some of the major organisational challenges within the industry such as collaboration and new technology.

The most interesting thing about the Conference is that, while it obviously has a big industry focus, we’re also directly engaging with some of the most significant challenges that the whole world faces over the next hundred years. Climate change, overpopulation, energy security, health and quality of life are all well within our remit, and it’s at events like this that you can truly see how important a position building services engineers occupy in society. We make the modern world work, and this is where we look at how to make it better.

The Conference is a chance to mingle with the industry's best and brightest
Our key theme this year is ‘Inspiration’, which is hard to pin down but crucial to the future of the way we work. Given all I’ve said about engineers’ place in the world, we still don’t occupy as central a place as we ought to in positions of power – contributing to planning and policy making in the many areas to which we contribute. Unlike lawyers and bankers, engineers don’t have much representation in the UK Government. Our voices often go unheard and our advice unheeded, and we need to change that. We need to fight for influence and be prepared to challenge other engineers, other professions, politicians and the media in order to make sure sustainable and sensible policies in the built environment are top of the agenda.

With that in mind, we’ll be looking into both the past and the future on our first day. Celebrating anniversaries at their own companies and in the 40th year since the creation of CIBSE in its current form, Patrick Bellew of Atelier Ten and Max Fordham will be looking back at how the traditional role of the building services engineer has changed in the last 50 years. Then we’ll be looking forwards – why have warnings about building performance been ignored by Governments past, what can we do to change that, and what is coming up in the legislation pipeline that will affect our industry in future?

Indoor air quality is one of the big topics at the Conference,
as well as the subject of a #Build2Perform podcast!
We’re also getting to the bottom of a couple of burning issues in the industry. Air quality will be the subject of a number of talks, ranging from external air quality’s effect on the indoor environment to the ways in which indoor air quality can be improved in homes and schools. We’ll also be re-visiting the theme of collaboration from last year’s Conference, looking at what we’ve learned since then and examining the role that individual sectors have to play in the industry as a whole – from the supply chain to facilities managers.

As well as looking at the nuts and bolts of building performance, the Conference is a great chance to debate the big ideas as well. Talking about grander themes and longer-term ambitions is a great way to focus our minds on the potential of our industry, and the differences we can make to the world. We’ll be taking a look at the perfect world: What society would look like if all buildings achieved their best engineering outcomes. We’ll be looking at the imperfect world: What are the true health impacts of air pollution? And we’ll be looking at a better world: How can we ‘turn old into gold’ and make the most of the UK’s current building stock through retrofit.

It is this combination of the practical and the aspirational that makes the Conference so exciting, and the interaction of the two is at the heart of what is going to drive our industry forwards. We know that our industry represents some of the most knowledgeable technical experts in the world, and that we can do amazing things when we bring this knowledge to bear. We aim to create an environment where we can marry the two, and use our skill to make our vision happen. With a gallery of top experts here to speak, as well as over 500 people from across the industry, the Queen Elizabeth II Conference Centre is going to be an inspiring place for those two days in November, and we hope to see you there!  

The view from the 2015 Conference in Westminster
The CIBSE Building Performance Conference and Exhibition will be held on 17th and 18th November at the Queen Elizabeth Conference Centre in Westminster. For more info see the CIBSE Conference website.

Friday, 14 October 2016

Industrial action

At the upcoming CIBSE Building Performance Conference and Exhibition, we're going to be focussing heavily on the future of the industry - particularly the ways that new technology can be brought to bear on performance in the built environment; to find easier, smarter and cheaper ways to make buildings perform to their potential in a variety of different ways.

This week, we're speaking to two industry experts: Mat Colmer, Built Environment Specialist at the Digital Catapult Centre, and Nick Winser CBE, Chairman of the Energy Systems Catapult, who are giving is their views on technology in the built environment: What's hot, what's not and where the biggest changes are going to come.

What are the innovations in technology that will make the biggest impact to the performance of buildings in the next 15 years?

N W: I’m not sure there’s going to be a stand-out technology innovation, and fifteen years is actually not that long to make a big impact. A new home energy gateway that learns about the thermal performance of our buildings and the requirements of the occupants could provide a platform for all sorts of innovative energy services, with the potential to start a transformation in consumer and market engagement.

M C: Wireless sensor networks and IoT will have a big impact in the near term. Having reliable hyper-local networks that are off-the-shelf and interoperable will bring down the costs of monitoring our buildings, particularly monitoring the efficiency of services, and allow for products that encourage user feedback. This will allow us to gather far more information on what happens with buildings in-use.

Smart sensors relying on user feedback could be a common
low-cost feature in the future
What are the innovations in buildings that will make the biggest environmental impact in the next 15 years?

M C: Advances in curtailing energy use through intelligent metering and management, demand response and the wider use of DC power transmission will have a significant impact. Increased use of DC power additionally makes the prospect of decentralised power generation more attractive and can increase energy security.

N W: Energy efficiency itself isn’t a great driver of consumer action – for most people, spending money just to save kilowatt hours is not that attractive, and it’s unlikely to compete with other household demands. So whilst we must improve the effectiveness of efficiency measures, and reduce the cost, this needs to be coupled with imaginative new business models that refurbish living spaces, provide greater comfort, and as part of this deliver the required efficiency improvements.

Energy efficiency measures must be combined with other measures, such as
refurbishment, to maximise its effectiveness
If you could only recommend one change in process or method to improve building performance, what would it be?

N W: I think there’s a real need for focus, not just on the requirements of individual buildings, but for whole areas of our cities, towns and communities. Someone, and maybe it’s the local authority, should have the responsibility and design tools to develop local energy strategies that take account of house types, geography, supply networks and the availability of energy resources like waste heat. Growing consensus like this will be a massively important step to help individual occupants make the right future-proof decisions and find suppliers to deliver them.

M C: Make time to learn from the experience of others. Too often the same mistakes are made purely because time and budget constraints discourage creativity and encourage the familiar.

Waterman's Everyman Theatre in Liverpool won the Building Performance
Award for the community impact of their design
What is the most exciting potential collaboration opportunity in building services over the next 15 years?

M C: Advances in virtual reality and augmented reality technology will enable visual and interactive collaboration across sectors. Many problems in construction projects originate from poor communication. VR and AR technology allows partners to use shared spaces to explain and revise designs. Consequently misunderstandings and errors are less likely to occur.

N W: I think there’s a great opportunity for energy to be much more than a utility purchase. I’m sure we will see retail players who have trusted brands, using their reputations to develop new products that include home refurbishment with energy efficiency built in, and maybe other organisations that can bring a ‘lean’ process mindset to help advance the retrofitting of the nation’s buildings.

Friday, 7 October 2016

Performance, not promises

Having already taught us that BIM is a way of handling information, rather than a catch-all term for a specific programme or legal requirement, CIBSE BIM Consultant Carl Collins is back. This time, he's exploring what the different stakeholders in construction want from BIM, and how you can use BIM to help them get it.

The world is changing and the construction industry has to change with it. We are increasingly moving from analogue to digital technologies, for reasons of efficiency and transparency. Everybody is trying to lift the lid on digital technologies in the construction sector and the relevance of BIM to our everyday lives.

Many presentations and seminars over recent years have focused on the processes and forms of information exchange, but rarely looked at how they can be applied, especially for the bulk of the sector, that work on typical construction projects. The reasons for BIM have been stated many times before, and CIBSE is launching a series of roadshows that will show you how to use the technologies and processes to increase efficiency, accuracy and quality of information and to reduce the risk on projects, by exposing data in a structured way.

Different stakeholders want different things from BIM
By sharing openly and using relatively simple technology and techniques, you can see how to use data from a single source to generate multiple outcomes. It’s all about the bottom line, working smarter and using our digital assets more extensively will allow us to compete more effectively in this ever-changing world. But in order to know what those outcomes ought to be, you have to know the needs of different kinds of stakeholders and what they want.

For clients too, it can be the difference between getting the building they actually want – or not, performing at the peak of its ability. This can generate utility savings and provide a better environment for the occupants, increasing their efficiency and output, and can simply be a matter of asking the right questions at the right time in the design process.

SME Contractors
BIM can be used to gain better understanding of how the designs can be realised in the flesh, to procure with more certainty and to reduce re-work by understanding what is to be constructed and how. Digital tools can also be used to discover alternative suppliers and products, using metrics other than pure cost, to give the client the building they actually want.

The great benefit of doing this is simply that it reduces waste and uncertainty over cost, which can be a great benefit to an SME contractor and to the client. Forewarned is forearmed, and the ability to accurately simulate as many of the potential costs and permutations as possible allows the project to remain close to specification throughout its life.

BIM can help specialist contractors and their
clients plan for their unfamiliar needs
Specialist Contractors
It’s important to understand the needs of the client, the main contractor and the actual design by using shared and trusted data. When using specialist contractors this data can be vital, because it allows the designer to anticipate the unexpected when working in an unfamiliar area of the industry.

New equipment, new processes, tight deadlines and unforeseen challenges are often per for the course when working in highly specialist areas. Digital technology can be used to identify and compare new suppliers and products and rehearse details like construction sequences, so there will be fewer surprises at site. This minimises cost by reducing the number and impact of mistakes, and by reducing the time a project takes.

SME Consultants
Consultants' lives can be made considerably easier if you learn how to leverage design data to generate designs and deliverables that are BIM Level 2 appropriate, and making your consultant's life easier can streamline your processes to make fees go further and thereby increase profits. A consultant’s time can be expensive, which makes it all the more frustrating when it’s problems in your own systems that are holding up the project and costing you money.

Even worse, a mistake caused by bad processes costs even more time and money to fix and can damage your relations with the whole supply chain, while the alternative creates greater certainty in your designs and generates trust relationships with your clients and contractors.

Manufacturers and Suppliers
Manufacturers like to understand what is required of their products more fully, which can be achieved by having exact specifications contained within a BIM model. This allows them to reduce their overhead in information requests and fabricate using trusted data from the design teams. Use digital procurement techniques to deliver the right product at the right time and keep up to date with design changes as they happen can save money, and even make the difference between success and failure in delivering on time.

BIM helps ensure manufacturers have accurate, consistent specifications
Facility Managers
As the people who will actually be running a building on delivery, and who will be held accountable for its performance decades down the line, having a full understanding of the asset they will run is important. As one of the main beneficiaries of the data contained within a BIM model for years to come, what can benefit a building's FM the most is having actual input in how the model is designed and what parameters it measures, because they know what will be most useful to them in the long term.

For that reason, it is important that FMs are fully involved in the process of designing the parameters of the building they will run, know what the design parameters are and the actual performance characteristics of the systems that are constructed and use the design and commissioning data to populate the CAFM model automatically.

Monday, 3 October 2016

The air we breathe

Welcome to the fourth #Build2Perform podcast! This month, we're concentrating on the issue of indoor air quality. What is it, why is it important and what can engineers do about it? I'll be speaking to two experts in air quality, independent sustainability consultant Julie Godefroy and Alan Fogarty of Cundall, to answer those questions and more!

You can listen to the podcast below, but you can also find it in the iTunes library and on other podcast apps by searching #Build2Perform if you'd like to listen on the move via smartphone or tablet. We'll also be discussing the podcast on Twitter under the #Build2Perform, and you'll find useful links about what you hear under the podcast below.

Indoor air quality is becoming one of the next great public health issues of our time, and is being considered more and more by designers as a fundamental part of the building's health. Overshadowed somewhat in the public eye by its outdoor cousin, more and more research is being carried out into an area that could claim more than 40,000 lives a year in the UK alone.

One of the most recent and comprehensive studies carried out int his area is by the Royal College of Physicians, and takes in both indoor and outdoor data. CIBSE also has knowledge available specifically on the indoor component, such as KS17: Indoor Air Quality & Ventilation, published in 2011.

From a regulatory perspective, both the UK Government and the European Union have rules on indoor air quality standards, which are summed up by the Government here. Indoor air quality in the home and in schools is a major thread at this year's CIBSE Conference and Exhibition. Sessions that deal directly with this issue are:

Friday, 23 September 2016

Making cities smarter

With the rise of Big Data in construction and design gathering pace, we have the opportunity to use measurable data to shape buildings and cities around their occupants like never before. Ever on the lookout for the next big technology in the field, the team at Innovate UK recently picked data-analytics company NquiringMinds as IoTUK Boost winners, and they're here to tell us what all the fuss is about.

The Internet of Things has been regarded as the next step in our evolution for a while, but until recently we’ve only just started to realise its full potential. With the ability for everything to be connected and working in a smarter, more efficient way, it’s little wonder that innovators have been looking for different pathways to creating a platform to reap the benefits of it all. Step forward, nquiringminds, who won a Small BusinessResearch Initiative contract to develop an open data platform to help cities deliver key services in a smarter fashion.

To put the power of the technology into perspective, nquiringminds allows cities to capture, secure, analyse and use all sorts of data so that all of its operations can be smoothed out. Whether that’s the running of schools, managing the traffic flow of public transportation, connecting health and social care services or many other things, we now have an answer to make our cities much smarter places to live and work.

The data has always been there, but before there’s never been a chance to round it all up and analyse it with any great depth. That’s because there’s no one organisation or individual who owns it, so the likes of national agencies, emergency services, private companies and subcontractors horded the data and made it tough to decipher. With the nquiringminds platform we have the technology to break down the dam holding the data back, providing the key insights that we’ve been looking for. This means the planning and running of a city’s operations can be streamlined like never before.

The software that nquiringminds developed allows for sensors to be placed into buildings, which then provide state of the art analytics. These analytics can be shared with numerous people and organisations, resulting in a variety of benefits for the people living in them. For example a social worker would be able to tell if an elderly person was moving around the house okay, and a maintenance company would be able to tell if any equipment is close to failing. Elsewhere homeowners will be able to check if they’re getting the very best deals on their energy usage.

New technology is vastly increasing the amount of useful data available to engineers 
These sensors are already being used in 200 council homes in Southampton in order to predict when any refurbishment will be needed. The technology also currently looks into the management of waste, the planning of infrastructure and many other useful insights. Thanks to innovations like this we’ll be able to overcome many of the challenges faced in our cities and enhance the quality of life for everyone residing there.

For more videos like this head to Innovate UK’s YouTube channel, or take a look at their Twitter account here.

Friday, 16 September 2016

Time to pull up a chair

As the UK experiences its hottest September day since 1949, the Government signs a major new emissions target and nations begin to ratify the Paris Agreement, the focus on climate change has never been higher. As part of our look at how different built environment professions can improve building performance Geoff Prudence, Chair of the CIBSE Facilities Management Group, looks at what building performance means to FMs 

The UK Government recently approved its 5th Carbon Budget, committing the UK to reducing its emissions by 57% relative to 1990 levels by 2030. This is an encouragingly ambitious target, but the Government knows it needs to stick to all its current measures, and introduce new ones, to stand a chance of being successful. Most of the hard work so far has been done by cutting carbon emissions from power generation, and the Committee on Climate Change has singled out the built environment as an area that needs to pull its weight.

This will come as no surprise to those working in the built environment, especially facilities managers, who have to deal with the cost and performance implications of inefficient buildings on a daily basis. In fact, the energy consumption of commercial buildings is estimated to be between 15 and 30 per cent higher than was anticipated at the design stage. Sometimes even more. The problem facing facilities managers in this situation is that, while much can be achieved by implementing energy efficient policies within an existing building, a large amount of the fault can rest in the building’s fabric and design. In cases like this, there are many reasons why a building may not be performing to the original specifications laid out by the client.

Countries across the world are signing up to the Paris Agreement to keep
global temperatures less than 2C above pre-industrial levels
First and foremost is poor communication of objectives and a lack of shared vision between the client and the contractors responsible for designing and constructing the finished building. While the performance gap is a known and recognised problem within the industry, there is no party with clear responsibility for ensuring that designers, whether architects or engineers, are all pulling together to prioritise the energy efficiency of the building over its life.

More than just an issue of profit margins, the performance gap has implications for consumer confidence in the entire building services industry. Such large differences between the expectations and the delivered product would not be acceptable in other businesses, and are damaging to the perception of the industry as a whole. As demands on buildings from the users, the climate and from Government increase, it is only going to become more necessary that building services professionals work together to tackle the issue.

A second issue is the problem of exactly how the performance gap is defined and measured: Should the performance of the building be measured against the estimates at the design stage, or should it be measured against the more detailed plans produced when the tendering process is complete? The latter may give more accurate estimates based on the exact design of the structure and the materials to be used, but it also has the potential to reduce ambition and allow the designers to be too conservative, sacrificing performance for cost.

Measuring performance based on plan can allow
designers to get away with being too conservative
Within this issue, there is also the problem of exactly how to measure building performance in the first place, from the conceptual stage all the way up to the finished product. There is no universally agreed way to measure and correct the observation of energy performance for factors like design change, occupant behaviour, changing weather conditions and simple wear and tear. These can all impact the performance of the building over and above its design, but must be estimated before a more accurate measurement is taken, which can create a wide discrepancy with actual performance.

The root of these issues is really that the ‘performance gap’ is just a handy phrase for summing up a whole series of different problems that occur with many different aspects of a project, including lighting, ventilation and energy performance. Without a clear model with defined metrics from which predictions can be made, and results tested against, it is difficult to create a definitive solution for disappointing performance.

Another aspect of the performance gap is that what is designed may be changed during the construction and installation stage. Products can be substituted, installation details may not be fully correct and systems may not be fully commissioned.

The services plant, from boilers to air conditioning units, requires constant maintenance to keep at peak condition. Focusing on a building’s performance at its design stage neglects the importance of measuring performance over its entire life-span. To achieve this, there needs to be both a common thread of individuals collecting this data and continuously monitoring the building’s performance, as well as the framework in which to store this information for it to be retrieved by future users.

Without this, the building’s performance will slowly degrade as elements are gradually replaced by cost equivalents without reference to the original performance targets set at the building’s design. Only by ensuring that changes and maintenance keep the building’s energy performance within acceptable standards, subject to proper testing of new elements in comparison with the old, can the performance gap be addressed in the long term.

Maintenance is just as important as the building's designed performance
in measuring whole-life performance
So what is the role of the Facilities Manager in making sure that buildings are able to perform as required? The answer requires a much more hands-on approach on the part of Facilities Managers, even before the first ground is broken on a new project.

As the people running the building in the many years to come after it is finished and handed over, Facilities Managers are the perfect choice to be the guardians of its performance throughout the life of the project. There is a tendency for the many parties involved in the design and construction of a project to see the shiny new school, apartment block or hospital as the objective, when for the client it is merely the start of a long relationship. The FM knows the management strategies they favour to get the most out of a building, so they should be implementing these at the very start of a project rather than working around what already exists when they move in. There need to be examples of FM and Systems thinking implemented directly into the design process.

A fantastic tool that can be used to make this dream a reality is Building Information Modelling (BIM). Its application in the design and construction sectors is already much appreciated, but the real potential behind the technology lies in helping a building maintain peak performance end-to-end throughout its lifecycle. Nobody knows the day-to-day realities of running a building better than Facilities Managers, so they should be pushing to have much more input into the building’s model – making sure it is designed for every day of the next 60 years, and not just for handover.

Facilities Managers should have input into the creation of the original BIM model
Facilities Managers need to ensure that the information being fed into models is what they need, for example standard classifications for plant items and the maintenance that they require. This all contributes to the idea of the FM as the thread of continuity running through the life of the building, knowing what systems are in place, why they exist and how to maintain them correctly. In this role, the use of BIM would back up the decisions of the FM with actual data, which could be used to inform changes to the complex, interdependent and ever-changing needs of the building. The most important thing is to get Facilities Managers up and engaged with the need for this, because if you don’t then you won’t get a seat at the table.

However, the adoption of the BIM model as an efficiency enabler is just the start of a wider FM revolution that could make it a firm part of the design process. The vision is a building and it’s design around use and business impact, being constantly monitored for greater efficiencies. The practical application of all this data can then find its way into every aspect of the building’s operation, from the O&M manual to Commissioning Codes.

A different approach to design could see FMs
present from design through to delivery
Without a proper evidence base behind them, commissioning a system is effectively guesswork based on estimates which we have already seen have the potential to be flawed. While it is a legal requirement to prove that commissioning has taken place on systems installed in a building, there is no set commissioning cycle that the installation team has to follow – good commissioning and bad commissioning are the same in the eyes of the law. With the aid of a robust data set to inform decisions, a hand in construction from the start, proven Commissioning Codes and effective maintenance based on CIBSE Guide M, it is possible to ensure that all of the building’s systems are set up to be as efficient and cost-effective as possible.

The ‘performance gap’ remains one of the greatest challenges facing the building services industry today, particularly to the facilities managers who have to face the everyday reality of a poorly performing building in the form of spiralling energy bills and missed targets. As climate change becomes a more urgent issue in the built environment, and the pressure to crack down on waste increases, it is only going to become harder to meet more and more stringent requirements with buildings that are just not up to the job. This is why it is more important than ever that the influence of the facilities manager grows to influence the design and construction of the building from beginning to end of life, and act as the informed cheerleader for better performance.

Friday, 9 September 2016

Time in the sun

Continuing our series exploring alternative methods of power generation, including Micro-CHP and Surface Water Source Heat Pumps, we turn our attention to photo-voltaics (PV). This week, we explore the work done by Dr. Cynthia Skelhorn, Qatar Green Building Council and Dr. Maria Muhlbauer, UnionBent GbR, Management Systems, Germany in determining the potential of PV in the two countries.

All countries and forward-thinking governments are aiming to address two main issues in developing long-term energy policies.  First, from a demand perspective, they must consider how to decrease energy consumption by implementing energy efficiency policies and technologies. There are several benefits to this; it can lower the Government's own energy bills across the national portfolio of publicly owned buildings common to many countries, it can lower the household and business bills of a country's citizens, and it reduces a country's reliance on imported energy, increasing that country's self sufficiency.

Micro-generation using PV is a promising avenue for renewable initiatives
Secondly, from a supply side, they must consider their best options for alternative energy sources in order to reduce the CO2 emissions that accompany the consumption of fossil fuels. Carbon-intensive methods of energy generation are first on the chopping block, with Governments across the world exploring ways to switch from coal, oil and gas to renewable alternatives like wind and tidal. Despite a leveling or declining trend in the US and OECD countries, consumption of liquid fuels continues to increase on a global scale.

Qatar Green Building Council (QGBC), a member of Qatar Foundation for Education, Science and Community Development (QF), hosted Dr. Maria Mulhbauer from UnionBent GbR in Germany in order to develop and adapt her expertise in Building Integrated Photovoltaic (BIPV) management systems to the climate and economics of Qatar and the GCC region.  Dr. Mulhbauer is investigating the potential for demonstrating a BIPV system in Qatar’s first Passivhaus, located in Barwa City, developed in cooperation with Barwa Real Estate Group and Qatar General Electricity & Water Corporation (Kahramaa), and other numerous private companies and organizations operating in Qatar.

Germany aims to generate 60% of its power using renewables by 2050
Building up photo-voltaic  micro-grid generation could be one of the most promising approaches for supply-side policies. However, the integration of BIPV has its own drawbacks. Every country that seriously wishes to distribute PV micro-generation must have comprehensive information on risks and benefits for its citizens.  Additionally, PV systems must be adapted to the environmental conditions, the economic situation and the requirements of the inhabitants. Matching these requirements will be more sustainable than temporary subsidies or exorbitant feed-in tariffs, as adopted in some European contexts.

To demonstrate this statement, two different countries - Germany and Qatar - are compared.

Annual Solar Radiation
German annual solar radiation amounts to approximately 1000 kWh/m2. High temperatures and dirt are not frequent problems. While the radiation is five times higher in the summer than in the winter, the level of solar radiation on any particular day depends on the cloud cover, the number of daylight hours, and the altitude above sea level. Moreover, the position of the sun, which is determined by the various seasons and the geographical latitude, influences the intensity of the sun and so the output of the PV system.

Energy security fears are driving countries in the
Arabian Gulf to explore renewable generation
The annual number of daylight hours in Germany stands at about 1,300 to 1,900 hours (compared to 8,760 hours in a year). Management systems that can automatically switch on different appliances to match the consumption to the small PV energy peak during the daytime present a means for the most effective utilization of energy in systems that are not yet developed for storing the energy generated.

In contrast, Qatar, as a member of the Gulf Cooperation Council (GCC), belongs to one of the most productive solar regions with some of the highest summer temperatures in the world. It is fortunate in having a high annual irradiation level of 2190 kWh/m2 and up to 3400 daylight hours. This represents an environment for utilizing solar energy, but also with some drawbacks, such as reduced efficiency of the modules by these high temperatures and near-permanent covering of the modules with sand and dust. Therefore, the PV systems need additional equipment for cleaning and cooling to reduce these extreme climate effects.

The Pay Back Time (PBT)
The PBT is often used as a guide to cost effectiveness. If the PBT is significantly less than the expected lifetime of the system, the project is considered to be cost-effective. Electricity tariffs play an important role in this cost-effectiveness of BIPV systems.

In Germany, the grid parity was reached in 2012. Therefore, the price for electricity for private consumers is similar to the costs for own-produced energy, as in the BIPV system.  This leads to an estimated PBT of 6 – 8 years to repay the costs of manufacture and installation, depending on the proportion of own-consumption.  The conditions for the extended micro-grid generation currently are very good and in the coming years it is likely that 20-30 % of the entire electrical power supply will be covered by PV energy.

Qatar experiences some of the highest summer temperatures in the world
The current low electricity tariff in Qatar leads to a high PBT of more than 100 years for both south tilted and horizontal BIPV. In order to promote the additional advantages of renewable energy in this particular situation, the government must develop and provide additional incentives to its citizens.

Because of the current low cost of electricity, the motivation for adoption of renewables in Qatar must be based on something other than energy cost savings.  Several other motivations might include: the desire to be viewed as a pioneer in renewable technologies within the GCC region, adopting a policy of saving energy resources internally in order to export the savings to the international market, or perhaps taking the lead in placing a value on CO2 emissions and using this as a platform for increasing alternative technologies.  Whatever the motivation might be, it is clear that Qatar certainly has the right environmental conditions for developing and utilizing PV and BIPV in its energy policy plans for the future.