Hybrid Heat Pump Performance Evaluation in Different Operation Modes for Single-Family House

Jelena Tihana (), Hesham Ali, Jekaterina Apse, Janis Jekabsons, Dmitrijs Ivancovs, Baiba Gaujena and Andrei Dedov
Additional contact information
Jelena Tihana: Institute of Heat, Gas and Water Technology, Riga Technical University, LV-1048 Riga, Latvia
Hesham Ali: Department of Energy Technology, Tallinn University of Technology, Ehitajate Tee 5, 19086 Tallinn, Estonia
Jekaterina Apse: Institute of Heat, Gas and Water Technology, Riga Technical University, LV-1048 Riga, Latvia
Janis Jekabsons: Institute of Heat, Gas and Water Technology, Riga Technical University, LV-1048 Riga, Latvia
Dmitrijs Ivancovs: Institute of Heat, Gas and Water Technology, Riga Technical University, LV-1048 Riga, Latvia
Baiba Gaujena: Institute of Heat, Gas and Water Technology, Riga Technical University, LV-1048 Riga, Latvia
Andrei Dedov: Department of Energy Technology, Tallinn University of Technology, Ehitajate Tee 5, 19086 Tallinn, Estonia

Energies, 2023, vol. 16, issue 20, 1-17

Abstract: Hybrid heat pump (HHP) represents a heating system (HS) that simultaneously utilises two or more energy sources. The key novelty is the integration of an optimised control strategy, effectively maximising the efficiency of both the heat pump and gas boiler segments. In this study, a HHP system that consists of an air-source heat pump (ASHP) and a condensing-type gas boiler (GB) for a two-story single-family house was calculated and validated. The results from three different calculation methods were obtained: the heat pump manufacturer’s calculator, the simulator programme, and the calculations based on real measured data. Two operation modes were tested: economic mode, where the cheapest energy resource becomes the priority, and ecological mode, where the system operates using the energy resource with lowest CO 2 emissions. When comparing consumed energy, there was a 15.36% variance between the manufacturer’s program and the actual measured data, while for produced energy, the difference amounted to 25.81%. It was found that the balance point temperature is −7 °C, where the heat pump unit of the HHP system can cover necessary heat losses until that point, while the gas boiler operates at lower temperatures. Changes in electricity price can significantly influence the point of the system switch, but the possibility to cover heat loads of the heat pump unit always has to be taken into account.

Keywords: heat pumps; energy efficient; CO 2 emissions (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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