Eventos Anais de eventos
ENCIT 2022
19th Brazilian Congress of Thermal Sciences and Engineering
ANALYSIS OF THE THERMAL PERFORMANCE OF A EARTH-AIR HEAT EXCHANGER (EAHE)
Submission Author:
Carlos Henrique Diedrich , PR
Co-Authors:
Carlos Henrique Diedrich, Douglas Pereira Vasconcellos, Gerson Henrique dos Santos, Victor Vaurek Dimbarre, Thiago Antonini Alves
Presenter: Victor Vaurek Dimbarre
doi://10.26678/ABCM.ENCIT2022.CIT22-0297
Abstract
Because heating and cooling accounts for a substantial portion of worldwide energy consumption, a series of studies has been conducted in quest of novel strategies for reducing energy demand in air conditioning situations. As a result, recent years have seen an increase in discussions on building energy efficiency and the active and passive solutions required in thermally inefficient design projects. As a result, the use of passive solutions in these projects has proven to be beneficial for energy savings, and the option of employing the soil as a source of renewable energy has arisen. As a result of its great thermal capacity, the soil can operate as a big thermal reservoir, adding or withdrawing heat from the ambient air coming from inside the buildings, essentially independently of the climatic conditions of the surfaces. In this regard, the goal of this research is to examine how well an earth-air heat exchanger (EAHE) performs in heating or cooling air in each environment. The system, which includes 100 mm diameter Polyvinyl Chloride (PVC) ducts, 2" galvanized steel pipes, and a fan for airflow control, was built on the premises of the Federal University of Technology of Paraná (UTFPR) Campus Ponta Grossa, next to Block J1. The pipes were insulated to prevent heat loss along the way, and a series of k-type thermocouples were inserted along the EAHE, the ground, and the environment. Temperatures were recorded hourly over four days in January 2022 using a data acquisition system. The heat exchanger's coefficient of performance was examined because of the findings, and it was discovered that. Despite the thermal gains of radiation in the system and the soil, the resulting increase in the temperature of the exchanger inlet, and the relatively low COP, positive results in heat removal from the environment were achieved. Factors such as the fan's high power and the region's climate were crucial in ensuring that the results obtained did not improve.
Keywords
Earth-Air Heat Exchanger (EAHE), air-soil heat exchangers, air conditioning
