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

Abstract

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.

Фундаментальна Теплофізична Інженерія Будівель У Контексті Відновлення України

“…Така геотермальна вентиляція взимку сприяє роботі системи опалення, а влітку -системи кондиціонування. Більш того, на основі природної теплоти ґрунту змодельовано і реалізовано за допомогою насипних ґрунтових теплообмінників теплову повітряну завісу для фасадів і даху будівлі [15,16];…”

Thermal Performance of EAHE System in Algerian Site: Case Study of Ghardaïa

“…Basok et al [21] validated a numerical model of the circular EAHE system. A longer pipe with a smaller buried diameter having a lower airflow velocity generates an optimal performance of the EAHE system [22].…”