Hybrid Ventilation with Innovative Heat Recovery—A System Analysis

Abstract

Abstract:One of the most important factors when low energy houses are built is to have good heat recovery on the ventilation system. However, standard ventilation units use a considerable amount of electricity. This article discusses the consequences on a system level of using hybrid ventilation with heat recovery. The simulation program TRNSYS was used in order to investigate a ventilation system with heat recovery. The system also includes a ground source storage and waste water heat recovery system. The result of the analysis shows that the annual energy gain from ground source storage is limited. However, this is partly a consequence of the fact that the well functioning hybrid ventilation system leaves little room for improvements. The analysis shows that the hybrid ventilation system has potential to be an attractive solution for low energy buildings with a very low need for electrical energy.

Heat Loss for a Run-Around Hybrid Ventilation System with Heat Recovery

“…Recent development concerning heat exchangers with very low pressure drop has made these types of systems possible, Hviid andSvendsen (2011), andDavidsson et al (2013a). These types of heat exchangers can be used in run-around heat recovery systems, Davidsson et al (2013b). A typical run-around system equipped with a heat recovery system is shown in Fig.…”