Abstract
A new compact and cost effective heating and ventilation concept for decentral renovation of small flats in multifamily houses was developed and investigated in the framework of the Austrian project “SaLüH!” through a dynamic building and HVAC simulation study based on results of laboratory measurements of functional models. The system consists of a façade integrated supply air/exhaust air heat pump equipped with a desuperheater allowing to increase the heating power and to add more freedom to control the system. The simulation results show that such a system is able to improve the thermal comfort of the flat (compared to the standard heating concept without desuperheater) with good indoor air quality and satisfying energy performance. The proposed system - because of its versatility and compactness - represents an ideal solution for decentral renovation of flats in multi-family houses, especially in case of limited space inside the flat and if central solutions are not possible for technical, economic or social reasons.
Highlights
Introduction and motivationThe building sector is responsible for a large percentage of the world energy requirements
Almost 50% of the total electricity consumption of the HVAC system is due to the compressor, and a relevant part is due to the ventilation system (32%) that works for the entire year (a constant supply airflow rate (100 m3/h) throughout the year was assumed)
In the framework of the Austrian project SaLüH!, a new heating and ventilation concept based on a façade integrated supply air-exhaust air heat pump with secondary air recirculation was developed, tested in the laboratory and investigated by means of a simulation study in CARNOT, Matlab/Simulink
Summary
The building sector is responsible for a large percentage of the world energy requirements. Cost-effective compact ventilation and heat pump units were developed as one of the possible solutions for energy renovation of small flats, especially in case of limited space [1]. Such a system can be completely integrated in the façade and minimizes the space required for renovation inside the flat. An improved variant of such a system was investigated within the framework of the Austrian project “SaLüH!” [3] and is described This new ventilation and heating concept is based on a supply air – exhaust air heat pump, with higher heating power and better control options of the system ensured by the use of a second condenser (i.e. desuperheater) with recirculation of secondary air
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