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Analysis of the Energy Efficiency of the Earth-To-Air Heat Exchanger

Basok Boris, Pavlenko Anatoliy, Nedbailo Aleksandr, Bozhko Ihor, Novitska Maryna, Koshlak Hanna, Tkachenko Myroslav

Rocznik Ochrona Środowiska

2022

Tom 24

202--213

This article represents the results of experimental studies of the temperature regime during the long-term operation of the earth-to-air heat exchanger. The average annual, total monthly and daily average specific amounts of heat extracted from the soil or released into the soil mass, respectively, depending on the cold or warm periods of the year, were determined. Analyzing the given data allowed a monthly assessment of the energy efficiency of using the earth-to-air heat exchanger. It is noted that the most significant thermal contribution occurs in the middle of the warm and cold periods of the year when the most significant difference in temperature of the outside air and the soil massif is observed. The use of earth-to-air heat exchangers is one of the necessary tools to lower the energy consumption for modern air-conditioning systems of buildings due to their energy efficiency.

Numerical Modeling and Experimental Studies of the Operational Parameters of the Earth-To-Air Heat Exchanger of the Geothermal Ventilation System

Basok Boris, Bozhko Ihor, Novitska Maryna, Nedbailo Aleksandr, Tkachenko Myroslav

Rocznik Ochrona Środowiska

2021

Tom 23

42--64

This article is devoted to the analysis of the heat engineering characteristics of the operation of an Earth-to-Air Heat Exchanger, EAHE, with a circular cross-sectional shape, which is a component of the geothermal ventilation system. The authors analyzed literature sources devoted to the research of heat exchangers of the soil-air type of various designs and for working conditions in various soils. Much attention is paid to the issues of modeling the operation of such heat exchangers and the distinctive features of each of these models. Also important are the results of experimental studies carried out on our own experimental bench and with the help of which the numerical model was validated. The results of these studies are the basis for the development of a method for determining the optimal diameter of an EAHE under operating conditions for soil in Kyiv, Ukraine.