Bouygues Immobilier is a leading private property developer in France and Europe, with 1,908 employees at 31 December 2017 and sales of €2,712 million in 2017. With 39 branches in France and four outside France, Bouygues Immobilier has nearly 60 years' experience in developing residential, corporate and commercial projects in more than 250 towns and cities. Bouygues Immobilier has a strong commitment to innovation and sustainable development and therefore seeks to provide better quality of life over the long term for all its customers by making their experience of the buying process and the use they make of the living spaces and services created for them as pleasant as possible. Bouygues Immobilier is the first developer to be certified ISO 9001 in France, NF Habitat HQE, and Top Employer France 2017, and to win the 2016 prize for the best customer relations awarded by the French Customer Relations Association (AFRC).
The Positive Energy Consortium was set up in October 2008 and comprises Bouygues Immobilier, Intel, Lexmark, Philips, Schneider Electric, Siemens, Sodexo, Steelcase and Total. The aim of its research was three fold: to reduce the energy consumption of future office buildings in their operating phase, contribute to increasing their capacity to produce energy from renewable sources, and optimise their environmental performance.
The Consortium, which brings its work to a close today, is unveiling the most recent breakthroughs from its research, made possible by the complementarities of the Consortium's members.
In 2009, it had focused its efforts on the challenges involved in measuring and managing energy performances and optimising office lighting and energy consumption, and in regard to work cantines and change management.
In 2010 and 2011, the Consortium focused its work on four major themes:
• Evaluating and actively managing environmental performance in office buildings
• Reconciling energy performance and comfortable working conditions
• Optimising the energy contribution of photovoltaic systems
• Network convergence
ECOPROFIL: A NEW TOOL FOR MEASURING ENVIRONMENTAL PERFORMANCE
Ecoprofil can be used to obtain a qualitative rating based on all aspects of an office building's carbon footprint (waste, water usage, etc.) during its operating phase, and to define avenues of improvement for each part of the building, department, staff member (technical staff, general services, catering, cleaning, etc.) and indicator.
In this way, the environmental impact of office buildings can be reduced through simple, pragmatic and collective action steps that harness the involvement of all stakeholders to set in motion a virtuous cycle of energy saving.
USER COMFORT AT THE HEART OF ENERGY OPTIMISATION
Though too often overlooked, user comfort is decisive for energy saving in office buildings. Aside from issues pertaining to corporate social responsibility, comfort of occupants is — for companies — a genuine source of productivity.
Decisions made to limit consumption, such as heating less in winter, using less air-conditioning in the summer, using less lighting year round and using automatic settings wherever possible to optimise energy expenditure, may at times clash with the notion of personal comfort and can therefore become counterproductive. This may result in types of behaviour that interfere with a building's overall energy settings, leading to malfunctions, higher costs and loss of productivity.
Based on this observation, the Consortium has placed user comfort at the centre of its research. In this context, appropriation of optimised systems by users and impact of occupants' behaviour on actual energy consumption become increasingly important considerations. The more energy efficient a building becomes, the greater is the direct impact of users. Users often account for one-third of a building's overall energy consumption.
PERSONAL OFFICE ENERGY MANAGER (POEM), A NEW TOOL FOR MONITORING AND ISSUING ALERTS ON INDIVIDUAL ENERGY PERFORMANCE
Convinced that users must take ownership of office energy-savings measures, the Consortium has endeavoured to create a new tool which can measure and issue alerts on users' energy consumption, thereby giving occupants a role to play in an office building's energy performance. This new tool, POEM, informs users about their energy impact in real time. Users are also guided at each stage of their day by a system of notifications along with practical advice on usage behaviour.
Using data gathered by the building management system (ventilation, air conditioning, heating, lighting, plug sockets, video surveillance, fire prevention, etc.), IT and office networks (workstations and printers) as well as information delivered by sensors, POEM has a complete overview of all consumption metrics. For example, it can provide users with personalised details of print usage from their PCs or from a specific printer.
Personalised monitoring makes it possible to give users an understanding of their impact on a building's energy consumption (in terms of department, storey and building section), receive warnings in the event of wasteful or unusual behaviour, and receive advice on saving energy on a workstation-by-workstation basis. Lastly, with POEM, users can interact with a building's environmental control system, change some of the automatic settings that are unsuitable, and adjust comfort settings in agreement with other users.
STEPS TOWARDS INCREASED USAGE OF PHOTOVOLTAIC ENERGY
The strategic value of using photovoltaic energy has been proven time and again. What is at stake today is that more extensive knowledge of outside technical constraints and a greater consistency in relation to buildings' internal workings are needed. If photovoltaic energy is to be used, it should be included into a building's design.
Although energy consumption must be reduced before any assessment of additional energy requirements can be made, photovoltaic systems must be expanded to include new concepts. Besides the solar panels that are placed on roofs, which fail to provide sufficient energy once a building is more than four storeys tall, the Consortium has suggested making greater use of side walls by equipping buildings with a new generation of sun-shields fitted with photovoltaic cells.
Having conducted all analysis and planning tasks on a joint basis, the various Consortium members henceforth pledge to implement the breakthroughs resulting from their work for the benefit of their staff and customers.
Full details of the research carried out can be found in our white paper downloadable from www.enjeu-energie-positive.com
Changes will be made to this document as new findings come to light.
About the Positive Energy Consortium : Set up in October 2008, the Positive Energy Consortium aims to pool the R&D efforts of various players involved in the operation of new-generation positive-energy office buildings. The Consortium's aim is to reduce the energy consumption of future buildings and increase their capacity to produce energy from renewable sources. Optimising the carbon balance is another goal.