Cooling performance of earth-to-air heat exchangers applied to a poultry barn in semi-desert areas of south Iraq
作者机构：Department of AgriculturalFood and Forestry SystemsUniversity of FirenzeVia San Bonaventura13.50145 FirenzeItaly
出 版 物：《International Journal of Agricultural and Biological Engineering》 (国际农业与生物工程学报（英文）)
年 卷 期：2018年第11卷第3期
页 面：47-53页
核心收录：
学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学]
基 金：Italian Ministry of Foreign Affairs and International Cooperation
主 题：Earth-to-air heat exchangers thermal performance cooling artificially wetted soil poultry barn heat stress
摘 要：Earth-to-air heat exchangers(EAHE)can reduce the energy consumption required for heating and cooling of *** composition and the thermal characteristics of the soil influence the heat exchange capacity,and the soil moisture can furthermore affect thermal performance of *** aim of this study was to compare the thermal performance of EAHE in dry and artificially wetted *** were carried out in the Basra Province(Iraq),in a semi-desert *** experimental EAHE were built in a poultry barn and tested from June 2013 to September *** pipe exchangers were buried at 2 m *** heat exchanger operated in dry soil(DE),while the other one operated in artificially wetted soil(WE).In the WE system,a drip tubing placed 10 cm above the air pipe wetted the soil around the *** temperatures at the inlet and at the outlet of both the exchangers as well as soil temperature at 2 m deep were continuously *** experimental results confirmed that wetting the soil around EAHE improves the general heat exchange *** coefficient of cooling performance(COP)of the earth-to-air heat exchangers system was evaluated on the basis of the ratio between the heat removed from the air or added to the air and the energy *** the day,with an average COP of 6.41,the WE system cooled the air more than the DE system,which reported a value of *** average,in the hottest hours of the day,the outlet temperature of the WE was 37.35℃ while in the DE it was 38.91℃.Moreover,during the nighttime,the WE system warmed the air more than the DE system.
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