A forward thinking attitude to energy management

Chris Monson, Strategic Marketing Manager of Trend

Chris Monson, Strategic Marketing Manager of Trend

Given that in parts of the world like Europe and North America some 40% of all energy used is consumed by buildings, both companies and wider society are increasingly focussing on the energy performance of their buildings, and how to improve it.

Building Energy Management Systems (or BEMS) are computer-based systems that help to manage, control and monitor building technical services (HVAC, lighting etc.) and the energy consumption of devices used by the building. They provide the information and the tools that building managers need both to understand the energy usage of their buildings and to control and improve their buildings’ energy performance. 

I’m Chris Monson, strategic marketing manager at Trend Control Systems, and I’d like to welcome you to the latest in a series of blogs where I, along with my colleagues, examine the issues affecting the building controls industry and the use of Building Energy Management Systems (BEMS).

It strikes me as somewhat bizarre that in an age where owners, managers and occupiers of commercial premises are under tremendous pressure to operate as energy efficiently as possible, so few developers recognise the long-term value of installing a fully featured BEMS at the construction stage. Such is the value and relevance of this technology, that to my mind it should be considered as important as other elements of the building services infrastructure that are designed in as a matter of course.

BEMS facilitate greater energy efficiency and the cost savings and the environmental benefits that can be experienced as a result of investment in this technology are considerable. A fully integrated solution can have up to 84 per cent of a building’s energy consuming devices directly under its control, offering greater visibility of energy use by monitoring services such as heating, ventilation, air conditioning (HVAC) and lighting.

According to the Carbon Trust 25 per cent of a building’s energy is used in lighting, and it is estimated that around a third of the energy consumed in this way in non-domestic buildings could be saved by utilising technology that automatically turns off lights when space is unoccupied. In addition, air conditioning can increase a building’s energy consumption and associated carbon emissions by up to 100 per cent, making it imperative that its use is tightly controlled.

So why isn’t the design and installation of a BEMS happening in the initial stages of a construction project? I’m afraid that the answer comes down to a combination of cost and lack of foresight. However, to fully understand why these two factors are proving so prohibitive to BEMS implementation, we need to understand a little more about the mind-set of the developer.

Developers tend to fall into two broad groups – there are those that configure buildings for others to inhabit and others who design and build premises for their own use.

When it comes to the former, the main driver is to save costs at the construction phase and little thought is given to the building’s future occupants and how they use the building. As there are no regulations stating that a BEMS must be installed, there’s a strong possibility that it won’t be. However, this lack of forward thinking leads to future occupants having to cope with inadequate visibility and control of their energy usage and, therefore, higher overheads and a larger carbon footprint.

Regarding the second group, it often comes down to the failure of owners to specify the need for a BEMS at procurement stage and make sure that they have systems in place that will maximise the energy saving potential of the building. While this type of developer will also have one eye on the cost of the project, the increased capital costs of installing BEMS is easily countered by the return on investment (ROI), with an average payback of just three and a half years.

Whichever way you look at it, the fact is that on a ROI basis early stage BEMS implementation makes sound economic sense. It can form less than one per cent of the total construction expenditure and energy savings of 10-20 per cent can be achieved when compared to controlling each aspect of a building’s infrastructure separately. The benefits don’t stop there either, as if it is incorporated with smart metering, tariff changes can be used to offer a strategic approach to energy management and control, and the data produced gives clear signposts for potential improvements.

I firmly believe that in the current business climate to construct a new build property without a comprehensive BEMS borders on foolhardiness. Organisations are faced with growing pressure to demonstrate carbon reduction policies and do all they can to lower their energy use.

Despite the controversy surrounding the introduction of the CRC Energy Efficiency Scheme, it is here to stay and is likely to extend its scope to incorporate more businesses in the future. In addition, The Climate Change Levy (CCL), Display Energy Certificates (DECs) and Energy Performance Certificates (EPCs) also affect businesses, while compliance with certification standards such as ISO 50001 put the onus on companies to demonstrate continual improvement in this area.

It should also be remembered that building occupiers are demanding greater visibility and transparency of their energy consumption and need access to data. A failure to meet this demand could mean that prospective tenants decide to go elsewhere.

Standardisation is playing an ever more prominent role and the most significant is EN 15232, which describes methods for evaluating the influence of building automation and technical building management on the energy consumption of buildings. It enables building owners and energy users to assess the present degree of efficiency of a BEMS and provides a good overview of the benefits to be expected from a control system upgrade. The use of efficiency factors means that the expected profitability of an investment can be accurately calculated and I’m pleased that a growing number of organisations are reviewing this document and implementing some of the best practice guidance it offers.

There are those who feel that regulation is the only way to make sure that BEMS are installed at the point of initial construction, although others are reluctant to see the introduction of more onerous legislation on an already pressured construction sector. At this stage I think that regulation shouldn’t be necessary if a long-term approach to energy efficiency is factored in and the benefits of a BEMS are recognised by more developers in the initial stages of a project.

Trend_RGB SMALLFor further information please call Trend Marketing on 01403 211888 or email marketing@trendcontrols.com. Trend are the main sponsors of this year’s BSRIA Briefing – Smarter ways to better buildings.

You can read more BSRIA blogs about BEMS here.  BSRIA’s WMI team also produce a BEMS market report – Building Energy Management Systems (BEMS) in Europe and the USA – which is available to buy from the BSRIA website. 

Best & Worst Practices Please!

Julia Evans, BSRIA Chief Executive

Julia Evans, BSRIA Chief Executive

BSRIA recently held a workshop on behalf of DECC identifying priorities to promote low carbon heating and cooling in non-domestic buildings as part of the development of its low carbon heat strategy.  Attendees were drawn from both the Young Engineers and Energy and Sustainability BSRIA networks.  Personal thanks to AECOM’s Ant Wilson for chairing the event.

It was a busy day.  It recognised that both new and existing buildings have a pivotal role in reducing greenhouse gas emissions, and by 2050 one of the key requirements will continue to be how we provide heating and cooling.

BSRIA’s Peter Tse and Ian Orme both gave excellent presentations which drew on both good and poor practices identified from more than 50 independently assessed case studies.  These, I felt, answered the questions “what does good practice look like”, as well as “what are the consequences when its not followed”.

The workshop session resulted in many suggestions as to priorities for the future.  There were a couple which caught my eye.

In response to the suggestion that one of the priorities for DECC should be identifying independently assessed best practice and developing exemplars of new technologies, a number of delegates felt that instances of “bad practice” were even more helpful.  It seemed to me that a priority for at least a part of the audience was to know what to avoid doing.  Perhaps this reflects the industry’s receptiveness to messages about risk, and that we often learn most when we make mistakes.  The emphasis on “independent assessment” also resonated.  Many have become sceptical about instances of self-identified “best practice”, and BSRIA’s independent guidance on what works, and what does not, is there to assist the industry do things better.

Another of the workshop themes was on “skills shortages”.  After many years of recession, construction companies have euphemistically “right sized”, and this means that we have lost a lot of great talent from the industry.  Now that there are green shoots of recovery in construction, there is already talk of an exacerbated “skills gap”.  This gap makes it even more challenging for the industry to deliver buildings which meet the needs of their occupiers and where innovation is required to help tackle climate change, and meet the UK’s commitment to “zero carbon” and “very low energy” buildings. This reminded me of another of BSRIA’s strengths – training provision.

BSRIA's 2014/15 Training Brochure

BSRIA’s 2014/15 Training Brochure

Finally there was an astute observation that our recent quest for low carbon buildings has meant that we have worried less about the efficient use of energy, with the net outcome that we can end up with an EPC A rating for carbon design, but a DEC G rating for energy in use.  The move to policies that move us to buildings which are both zero carbon and nearly zero energy use will hopefully remedy this, although I suspect this particular journey may contain further unintended consequences before we reach that goal.

The workshop identified many requirements if we are to create environmentally conscious buildings that meet user needs, and importantly maintain these elements over the life of the building.

BSRIA’s mission remains to “make buildings better”.  As part of my role, I’m listening to our members and the industry what they expect from BSRIA.  I’d like to extend this offer to you, so if you have ideas about BSRIA’s future role, please send them to me: Julia.evans@bsria.co.uk.

To learn more about the BSRIA workshop you can download all the presentations from our website. 

%d bloggers like this: