Evaluation of the 24-hour thermal conditions of a dwelling room in the warm period of the year in Moscow
https://doi.org/10.22227/1997-0935.2025.1.108-118
Abstract
Introduction. In modern design practice, it is customary to calculate the cooling capacity of an air-conditioning system as the sum of the maximum heat inputs into the room from the individual sources. The indoor air temperature in such calculations is assumed to be equal to the required temperature according to the hygienic norms. In this case, the calculation itself is performed with consideration of stationary heat transfer.
Materials and methods. The 24-hour thermal conditions of a dwelling room in Moscow with a window facing east were calculated. The calculation results were compared for steady-state and non-steady-state thermal conditions. Temperature maintenance in the room was achieved by night ventilation with outside air and daytime cooling with air from the Split-system, as well as by the cooling system with supply air. The chilled air temperature was assumed to be 20 and 22 °C.
Results. The changes during the day in indoor air temperature in a room oriented to the east were determined. It was found out that at a maximum daily outdoor air temperature of 33 °C, maintaining indoor air temperature not higher than 24 °C is possible only if the room is cooled with supply air of 22 °C and below 24 hours a day. It is also possible to cool the room starting at 5:45 a.m. with supply air cooled to 20 °C. In this case, the solar heat transmittance coefficient of the window should be no higher than 0.5.
Conclusions. Since in recent years there are higher outdoor air temperatures than before, it is advisable to increase the design outdoor air temperature during the warm period of the year.
About the Authors
E. G. Malyavina
Moscow State University of Civil Engineering (National Research University) (MGSU)
Russian Federation
Russian Federation
Elena G. Malyavina — Candidate of Technical Sciences, Professor, Professor of the Department of Heat, Gas Supply and Ventilation
26 Yaroslavskoe shosse, Moscow, 129337
M. I. Uryadov
Moscow State University of Civil Engineering (National Research University) (MGSU)
Russian Federation
Russian Federation
Maksim I. Uryadov — postgraduate student of the Department of Heat, Gas Supply and Ventilation
26 Yaroslavskoe shosse, Moscow, 129337
References
1. Mokhov I.I. Climate change: causes, risks, consequences, and problems of adaptation and regulation. Herald of the Russian Academy of Sciences. 2022; 92(1):3-14. DOI: 10.31857/S0869587322010066. EDN NTZPAK. (rus.).
2. Bolomatov V.N. Energy-Efficient Solutions for the Design of Heating, Ventilation and Air Conditioning of Industrial Buildings. AVOK. 2023; 8:48-55. EDN FAMCVN. (rus.).
3. Razakov M.A. Application prospects of a central air conditioning system in an engine room at a waste water pumping station. Kholodilnaya Tekhnika. 2023; 112(2):87-97. DOI: 10.17816/RF622931. EDN AYFGSN. (rus.).
4. Samarin O.D., Lushin K.I. Assessment of the impact of climate change on the energy efficiency of climate control systems of buildings. Housing Construction. 2020; 1-2:21-24. DOI: 10.31659/0044-4472-2020-1-2-21-24. EDN DDSDEO. (rus.).
5. Frolova A.A. Graphical method for determining energy consumes by climating systems at different level of thermal protection of an office building. Energy Saving and Water Treatment. 2023; 6(146):56-58. EDN FWDWEE. (rus.).
6. Kostin V.I., Dolzhikov V.N. Influence of the daily operating mode of public buildings on the consumption of cold by air conditioning systems. News of Higher Educational Institutions. Construction. 2021; 4(748):65-71. DOI: 10.32683/0536-1052-2021-748-4-65-71. EDN BXAAQM. (rus.).
7. Datsuk T.A., Ulyasheva V.M., Pukhkal V.A., Verhovskiy A.A. Influence of specific ventilation characteristics of office buildings on energy consumption. Bulletin of Civil Engineers. 2024; 1(102):73-83. DOI: 10.23968/1999-5571-2024-21-1-73-83. EDN KKUPHF. (rus.).
8. Samarin O.D. Comparison of calculations of energy consumption by air conditioning units. S.O.K. — Plumbing, Heating, Air-Conditioning. 2024; 3(267):61-63. EDN NCSXZL. (rus.).
9. Kumar G., De S., Thakur B. Wall and air conditioner combination for the best energy and economic performance: Methodology demonstration for high-rise residential buildings. Energy Conversion and Management. 2024; 300:117909. DOI: 10.1016/j.enconman.2023.117909
10. Malyavina E.G., Uryadov M.I. Methods of setting the initial climatic data for modeling the non-stationary thermal regime of the room. World experience. News of Higher Educational Institutions. Construction. 2023; 4(772):35-45. DOI: 10.32683/0536-1052-2023-772-4-35-45. EDN ITJVVU. (rus.).
11. Datciuk T.A., Anshukova E.A. Impact of the heat-humidity regime of warm attics on the condition of enclosing structures. Bulletin of Civil Engineers. 2019; 5(76):160-165. DOI: 10.23968/1999-5571-2019-16-5-160-165. EDN ZNNSFW. (rus.).
12. Marwan M., Marwan M.D. Designing a pre-cooling model for air conditioning to avoid an electricity price spike for different building characteristics. Journal of King Saud University — Engineering Sciences. 2023; 35(7):485-494. DOI: 10.1016/j.jksues.2021.07.004
13. Koroleva A.N. Modern approaches to air conditioning of residential and public buildings. Young Scientist. 2019; 9(247):99-101. EDN YYTBFZ. (rus.).
14. Tanadecha P., Khaothong K. Thermoeconomic analysis of duct works for air-conditioned building in Thailand. Energy and Built Environment. 2023; 6(1):80-95. DOI: 10.1016/j.enbenv.2023.09.002
15. Noferesti S., Ahmadzadehtalatapeh M., Gholami Motlagh V. The application of solar integrated absorption cooling system to improve the air quality and reduce the energy consumption of the air conditioning systems in buildings — A full year model simulation. Energy and Buildings. 2022; 274:112420. DOI: 10.1016/j.enbuild.2022.112420
16. Malyavina E.G., Lomakin A.G. The room thermal stability to be considered when calculating the room cooling load. S.O.K. — Plumbing, Heating, Air-Conditioning. 2020; 2(218):80-84. EDN QBVVDT. (rus.).
17. Efremov S.N., Timofeev V.A., Gonchar A.B. Analysis of the use of the air conditioning system taking into account the ten-year climate change in the city of Se-vastopol. Eurasian Union Scientists. 2021; 3-7(84):34-38. DOI: 10.31618/ESU.2413-9335.2021.7.84.1306. EDN ZUGKYF. (rus.).
18. Savin V.K. Influence of Global Warming on Building Energy Efficiency. AVOK. 2020; 6:52-59. EDN VLNPVJ. (rus.).
Review
For citations:
Malyavina E.G., Uryadov M.I. Evaluation of the 24-hour thermal conditions of a dwelling room in the warm period of the year in Moscow. Vestnik MGSU. 2025;20(1):108-118. (In Russ.) https://doi.org/10.22227/1997-0935.2025.1.108-118
Views:
136
Email this article 