Maintenance and Operation of sustainable buildings – first experiences with energy evaluation

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As part of the “MountEE” project, the “Sustainable:Building in the Municipality” service package is to be expanded by a Module 5, “Service and Maintenance”. An offer will be made concerning the evaluation of energy consumption alongside the consultation as well as in the area of environmentally friendly cleaning. This post will give a first overview of the testing of the “energy” part of the Module 5.

Aims of the Energy evaluation:
The aim of the future Module 5 is to assist municipalities in the phases following the new building or rehabilitation phase. Support for the municipalities will ensure that the constructed or rehabilitated building also achieves the planned energy consumption calculated and forecast during the consultation phase.

Reasons:
The need to provide assistance for buildings following the planning and construction phase is in particular a consequence of the ever more complex construction techniques and – especially in highly efficient buildings – of the increasing effects of user behaviour on energy consumption. The adjustment and parameterisation of the construction techniques will thus have a particularly significant influence on both the energy consumption and the comfort experienced in the building. During the commissioning of the technical systems, the focus is above all on the functioning and smooth operation of such systems. The extent to which the configurations of the technical systems actually correspond to consumption-optimised operation is however often not analysed or can frequently only be accurately determined once the periods of use and the user behaviour have been established. These can of course be assumed when planning and adjusting the parameters for the facilities, but this will not always correspond to the actual, highly individual conduct of users. It thus often only possible to establish optimum operating parameters for the technical facilities that correspond to the calculations following completion of the building and after a certain user familiarisation period.

The following contents are in principle to be offered in respect of Energy Evaluation in Module 5:

1. Basis: detailed collection of energy consumption data

  • Separate collection of the most significant energy consumption data using the KGA [municipal building certification] model
  • Basis: calculation model with entry of individual usage profiles and building services equipment (PHPP calculation)

2. Documentation of energy consumption

  • Support in collection of consumption and calculation data manually by the building manager or by entering the data e.g. in the energy control tool
  • Calculation of the settings, parameterisations and conditions of the actual location: summer and winter temperatures, air change, user behaviour, etc.
  • Definition of time intervals for documentation

3. Evaluation of energy consumptionimage001

  • Comparison of calculation data with individualised usage profiles
  • Parameter adjustment
  • Weak point analysis and further measurements as necessary

4. Implementation of improvement measures

5. Control of the effects of the improvement measures implemented

The Client or the Building Operator will jointly decide on the basis of the actual requirements and needs which of the contents of Module 5 “Energy Evaluation” are to be applied to the specific project. An individual co-ordinated offer will then be drawn up.

First Results of Energy Evaluation on the pilot building “community centre Lorüns” shows that by implementation of improvement measures more than 30% of energy can be saved without any technical investment.

The main improvements realised at the pilot building are: 

  • Regulation of air volume at the ventilation system
  • Reducing of outgoing temperature at the heating system

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