Paper Conference

Proceedings of Building Simulation 2017: 15th Conference of IBPSA


Energy Performance of Membrane Energy Recovery Ventilation in Combination with an Exhaust Air Heat Pump

Fabian Ochs1, Martin Hauer1, Michele Bianchi Janetti1, Siegele Dietmar1
1University of Innsbruck, Unit for Energy Efficient Buildings, Innsbruck

Abstract: Since the first discussion on energy recovery ventilation (ERV) in the literature some years ago, several papers were published about thermal comfort, performance and ERV modelling. However, a combination of membrane ERV and exhaust air heat pump (such as in a Passive House compact unit for ventilation, heating and DHW preparation) was not discussed in any of the previous studies. In an exhaust air heat pump, the exhaust air is the source of the heat pump and its performance is directly connected to the effectiveness of the ERV. The effectiveness of the ERV depends on the operation and boundary conditions (in particular the average relative humidity and the volume flow). Both are strongly coupled to the building and its use and operation. By means of simulation the complex dependencies are investigated. Simulation models for ERV are developed and compared against experimental data from the literature. For equal indoor air relative humidity, the air exchange rate can be significantly increased with ERV compared to a heat recovery ventilation (HRV). This will lead to a further improvement of the indoor air quality and to a significant better of the performance of the heat pump and an increase of the heating capacity.
Pages: 1121 - 1130