FACTORS AFFECTING THE EFFICIENCY OF WORK OF THE HORIZONTAL EARTH-AIR HEAT EXCHANGER IN GEOTHERMAL VENTILATION SYSTEM

  • Vasyl Zhelykh National University Lviv Polytechnic
  • Olena Savchenko National University Lviv Polytechnic
  • Vadym Matusevych REHAU VB

Abstract

To save energy in mechanical ventilation systems, it is advisable to use earth-air heat exchangers. They are intended for the transfer of low-potential soil heat to the air entering the ventilation system. The efficiency of heat exchange between soil and air depends on many factors. Moreover, some factors significantly affect the heat transfer process, and some can be neglected. This article identifies all factors that affect the performance of a horizontal earthair heat exchanger. It is determined which factors depend on the location of soil heat exchangers, and, accordingly, are permanent for the concret the terrain. There are factors that can vary depending on the task of designing the object. The basic parameters are determined, the change of which will allow to increase the heat exchange between soil and air in the heat exchanger, in particular, the speed of air movement and the diameter of the pipe of the heat exchanger. In addition, the intensification of heat transfer is carried out by the turbulence of air flow in the soil heat exchanger.

Published
2018-12-19
Section
Articles