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Control optimization of a double stage heat pump with desuperheater in multi-family NZEBs.

Number: No 066

Author(s) : OCHS F., MONTELEONE W., FRANZOI N., DERMENTZIS G.

Summary

Two multi-family buildings (MFB) with together 26 flats were designed to achieve a net Zero Energy (NZE) balance for heating, domestic hot water (DHW) preparation and all auxiliary energies. The roof of one of the MFB is covered by PV, the other is partly used for PV and partly for solar thermal (ST). A double-stage ground water heat pump (HP) with hot gas desuperheating (DSH) provides the remaining energy for heating and DHW. The system was designed with a low temperature distribution system (floor heating) and separate decentral fresh water preparation (DHW plate heat exchanger) for low thermal losses and optimal efficiency. Detailed performance maps of the double-stage HP pump with DSH were generated analyzing the monitoring data and by means of refrigerant cycle simulation. Simulation based optimization was performed with the aim to operate the HVAC system with improved performance. Different system configurations (i.e. with or without ST, with different buffer storage sizes, with different control strategies and set points) can be compared and evaluated also considering (seasonal) variations of the share of renewables in the electricity mix. 

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Pages: 12 p.

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  • Original title: Control optimization of a double stage heat pump with desuperheater in multi-family NZEBs.
  • Record ID : 30029959
  • Languages: English
  • Subject: Technology
  • Source: 13th IEA Heat Pump Conference 2021: Heat Pumps – Mission for the Green World. Conference proceedings [full papers]
  • Publication date: 2021/08/31

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