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D2.7 EeB technologies for synergy between building and neighbourhood energy systems

 

Abstract

This report is the outcome of an analysis of energy optimization possibilities at inter-building level by considering the interaction of buildings within a healthcare district and in relation with the surrounding neighbourhoods. Energy is vital for the operational core-business of hospitals: delivering healthcare. Besides, in the long run, focusing on sustainable energy is a form of healthcare as well. After the first step of energy reducing on each individual building, the next step in a logical approach for sustainability energy is energy exchange on the inter-building level. From the point of view of energy efficiency, a healthcare campus, with many different building typologies and typically high-energy consumers, is perfect suitable for neighbourhood energy systems.

 

To optimise the design process of energy exchange systems at inter-building level, interconnectivity between BIM and GIS system is necessary. This because a BIM model can help to get an accurate energy and power demand profile of a building. A GIS system is necessary to provide with an accurate source profile, for example to locate a Power Plant. However, not only the location, but even the capacity and energy profile and the distance to the campus, including determinate complexity factors like rivers and railway. In addition, even for demand mapping of all buildings on the healthcare campus or in a district area a GIS system is required.

It takes a few steps to identify the synergy between building and neighbourhood energy systems.

 

The first step in this task is to analyse the possibilities of energy optimization at inter-building level. It is therefore required to analyse and determine the energy profiles of hospital buildings and a complete hospital district. This first analysis will give a better understanding of the energy flows and temperature levels within the hospital building. This knowledge is required to filter and select the appropriate NES technologies to achieve synergy with the neighbourhood.

 

The second step is the categorizing and description of the Neighbourhood Energy Systems technologies in factsheets as library.
Neighbourhood Energy Systems are subdivided into the following categories.
1. Energy carrier
2. Energy generation and production
3. Energy distribution
4. Energy exchange
5. Energy storage
6. Other technologies

The factsheet of the Neighbourhood Energy Systems will contain a description of the technology, the characteristic parameters, the benefits and drawbacks and an indication when and where to apply the technology.

 

In the third step, the first and second step will be combined to indicate in which situation which NES technology can be applied.Hereby a matching of power and energy both demand and source supplemented with a configurator could support a decision maker. We have therefore developed a logical selection process to exclude or include technologies by ranking on different KPI’s. For example to consider geothermal, the suitability of the ground is a conditional criteria. Furthermore, a certain scale level of energy demand fits to the optimal size of the geothermal source.
 

The workflow for the decision making process is as follows.
1. Is to identify the local energy source which is considered for a specific location. For example availability of biomass or underground conditions.
2. Is to identify the supply potential of the supply matches required demand of power and energy and technical connection conditions.
3. Is to estimate the net fossil fuel consumption and CO2 emission.
4. Is to check legal conditions and technical requirements of the connection.
5. Is to suggest if a storage system is needed.
6. Is to suggest if a smart grid is needed or advised.

 

In this way, the decision maker in a design process is provided with relevant information about suitability of the state of the art technologies. Doing this to achieve net zero energy buildings as foreseen by EPBD 2010, through the optimisation of building and neighbourhood interactions.

 

Download:  D2.7 EeB technologies for synergy between building and neighbourhood energy systems

 

 

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