The paper investigates the seasonal performance of electric air-to-water heat pump comparing an on-off heat pump with an inverter-driven variable speed compressor. Reference is made to a heat pump for domestic space heating installed in Bologna, and the bin-method proposed by UNI/TS 11300-4 is employed in order to investigate the effect of external temperature. The analysis shows that the inverter heat pump performs better than the on-off one, displaying higher values of SCOP about at least 10%.

air source heat pump, inverter on-off, scop.

Received: June 5, 2021; Accepted: August 21, 2021; Published: September 24, 2021

How to cite this article: Eugenia Rossi di Schio and Vincenzo Ballerini, The scop of an air source heat pump: comparison between on-off and inverter heat pump, JP Journal of Heat and Mass Transfer 24(1) (2021), 79-86. DOI: 10.17654/HM024010079

This Open Access Article is Licensed under Creative Commons Attribution 4.0 International License

References:

[1] R. Lowes, J. Rosenow, M. Qadrdan and J. Wuc, Research and policy principles for heat decarbonisation through smart electrification, Energy Res. Soc. Sci. 70 (2020), 101735.
[2] V. Bianco, A. Marchitto and F. Scarpa, Heat pumps for buildings heating: energy, environmental, and economic issues, Energy and Environment 31 (2020), 116-129.
[3] H. Cheung and J. Braun, Performance comparison for variable-speed ductless and single-speed ducted residential heat pumps, Int. J. Refrigeration 47 (2014), 15-25.
[4] G. Bagarella, R. Lazzarin and M. Noro, Sizing strategy of on-off and modulating heat pump systems based on annual energy, Int. J. Refrigeration 65 (2016), 183-193.
[5] C. Naldi and E. Zanchini, Effects of the total borehole length and of the heat pump inverter on the performance of a ground-coupled heat pump system, Appl. Therm. Eng. 128 (2018), 306-319.
[6] H. Madani, J. Claesson and P. Lundqvist, Capacity control in ground source heat pump systems part II: comparative analysis between on/off controlled and variable capacity systems, Int. J. Refrigeration 34 (2011), 1934-1942.
[7] C. K. Lee, Dynamic performance of ground-source heat pumps fitted with frequency inverters for part-load control, App. Energy 87 (2010), 3507-3513.
[8] C. Aprea, R. Mastrullo and C. Renno, Experimental analysis of the scroll compressor performances varying its speed, Appl. Therm. Eng. 26 (2006), 983-992.
[9] E. Rossi di Schio, S. Lazzari and A. Abbati, Natural convection effects in the heat transfer from a buried pipeline, Appl. Therm. Eng. 102 (2016), 227-235.
[10] E. Rossi di Schio, M. Celli and I. Pop, Buoyant flow in a vertical fluid saturated porous annulus: the Brinkman model, International Journal of Heat and Mass Transfer 54 (2011), 1665-1670.
[11] C. Lee and S. Lee, An experimental study on the performance measurement of a heat pump using combined heat source heat exchange of fin-tube type, JP Journal of Heat and Mass Transfer 13(2) (2016), 229-238.
[12] UNI/TS 11300-4, Energy performance of buildings – Part 4: Renewable energy and other generation systems for space heating and domestic hot water production, 2012.
[13] www.aermec.com.
[14] www.arpae.it.