THE STATE OF THE HEAT AND COOLING CAPACITY OF THE AIR HEAT PUMP UNDER THE INFLUENCE OF HUMID AIR ON THE EVAPORATOR
Abstract and keywords
Abstract (English):
Thermodynamic processes affecting the mode of operation of the evaporative-condensing unit of the air heat pump system (VTNS) are considered. For efficient operation of heat cooling units, it is necessary to take into account the internal and external conditions of the workflow. Phase transformations occur not only in the volume of boiling refrigerant during evaporation and condensation, but also on the external heat transfer surfaces of heat exchangers. These processes lead to the inevitable occurrence and increase in time of frost, needle-like ice crystals with low values of the thermal conductivity coefficient, which leads to a decrease in the value of the heat transfer coefficient from the air stream to the boiling or condensing refrigerant and, accordingly, the efficiency and durability of the air heat pump system.

Keywords:
heat exchange, condensation, heat transfer, evaporation-condensation unit, cooling capacity, frost formation
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References

1. Babakin, B.S. & Erkin, M.A. (1987) Intensification of the operation of cooling devices during frost formation: Overview. M.: AgroNIITEIMMP (in Russian).

2. Rumyantsev, Yu.D. & Skorobogatov, I.A. (1985) Improving the efficiency of cooling devices during frost formation: Review information. M.: TsNIITEImyasomolprom (in Russian).

3. Fedosov, S.V., Fedoseev, V.N. & Oparina, L.A. (2019) Analysis of the environmental safety of refrigerants in heat supply systems by air heat pumps based on the principles of thermodynamic activity of non-equilibrium processes. Energoresursoeffektivnyye ekologicheski bezopasnyye tekhnologii i oborudovaniye. Sb. nauch. trudov Mezhdunar. nauch.- tekhn. simpoziuma «Vtoryye mezhdunarodnyye Kosyginskiye chteniya. priurochennyye k 100-letiyu RGU imeni A.N. Kosygina»", M.: FGBOU VO RGU im. A.N. Kosygina. (1), pp. 221-223 (in Russian).

4. Napalkov, G.N. (1983) Heat and mass transfer under conditions of frost formation. M.: Mashinostroenie (in Russian).

5. Fedosov, S.V., Fedoseev, V.N. & Loginova, S.V. (2022) Thermal processes in the evaporation-condensation circuit of an air heat pump. Privolzhsky scientific journal, 1(61), pp.104-110 (in Russian).

6. Fedosov, S.V. & Fedoseev, V.N. (2022) Heat transfer and desublimation in the evaporative line of an air heat pump, Privolzhsky Scientific Journal, 2(62), pp.94-104 (in Russian).

7. Kremers, K.D. & Mera, V.K. Formation of frost on vertical cylinders under conditions of free convection, Teploperedacha, 1982, (2), pp. 1-7 (in Russian).

8. Fedosov, S.V., Fedoseev, V.N. & Oparina, L.A. (2020) Design and operation of buildings when solving joint energy-efficient heat supply and microclimate, Sb. materialov XX Mezhdunar. nauch.-tekhn. konf. «Aktualnyye problemy stroitelstva. stroyindustrii i arkhitektury». Tula: Tulskiy gosudarstvennyy universitet, pp. 324-328 (in Russian).

9. Fedosov, S.V., Fedoseev, V.N., Zaitseva, I.A. & Emelin, V.A. (2020) High-tech three-in-one air source heat pump system for low-rise and cottage buildings, Pribory, 2(236), pp. 49-53 (in Russian).

10. Aloyan, R.M., Fedoseev, V.N., Vinogradova, N.V., Voronov, V.A. & Emelin, V.A. (2017) Heat loss and heat gain during the joint operation of the mixing chamber and the air-heat pump in low-rise buildings, Izv. vuzov. Tekhnologiya tekstilnoy promyshlennosti, 4(370), pp. 209-213 (in Russian).

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