In:
RUDN Journal of Engineering Researches, Peoples' Friendship University of Russia, Vol. 22, No. 4 ( 2021-12-30), p. 339-347
Abstract:
The increase in the cost of fuel and energy resource and the deterioration of the environment from the combustion of traditional fossil fuel, have led to a great interest in energy-saving technology by using secondary energy resources in the thermal energy of industrial, housing and communal services using heat pump units in Russia and abroad. This paper analyzes the well-known two-stage heat pump units, and reveals their advantages in comparison with single-stage. The modeling of a highly efficient multistage vapor compression heat pump unit is proposed. Moreover, a method for calculating a multistage heat pump unit with a high coefficient of performance is presented. In addition, an example of calculating the thermodynamic cycle of a four-stage heat pump unit is presented. The influence of the number of stages on the increase in coefficient of performance in relation to a single-stage heat pump unit, the effect of the temperature difference between the temperature of the high-potential heat source and the temperature of the low-potential heat source on the coefficient of performance were analyzed. In addition, the influence of the initial value of the temperature of the high-potential heat source before heating during the course in the heat pump unit on the value of coefficient of performance for a different number of stages is analyzed under the condition of a constant difference between the heating temperature of the high-potential heat source at the outlet of the heat pump unit and the temperature of the low-potential heat source.
Type of Medium:
Online Resource
ISSN:
2312-8151
,
2312-8143
DOI:
10.22363/2312-8143-2021-22-4
DOI:
10.22363/2312-8143-2021-22-4-339-347
Language:
Unknown
Publisher:
Peoples' Friendship University of Russia
Publication Date:
2021
detail.hit.zdb_id:
2943394-0
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