07.2021.159.179

Study the effects configuration and design parameters on the performance of earth to air heat exchanger used in poultry houses

Author(s):

Mushtaq I. Hasan, Dhay Mohammed Muter*

Affiliation(s):

Mechanical Engineering Department, College of Engineering, University of Thi-Qar

Corresponding Author Email: dhaydhaymm@gmail.com

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

The main part of generated energy is consumed by cooling and heating systems. One of the promising approaches for heating and cooling applications is earth to air heat exchanger (EAHE) system. Usually, poultry houses are located in a remote area where there is no electricity, and where there is electricity, it is expensive, so resorting to these solutions is considered important solutions to save electrical energy and provide free cooling. This system is effective passive heating and cooling systems which can be used with poultry houses and buildings. This paper studies numerically the effect of design parameters and configuration on the overall performance of earth to air heat exchanger for poultry houses. The parameters (pipe diameter, pipe length, design shapes) are selected under environment of Nasiriyah city in the south of Iraq. The lengths of pipe selected (355 m,370 m,385 m,395 m and 410 m) and the diameters of pipe (2 in,3 in,4in and 6 in), the mass flow rate is constant (22948.2 Kg/s). The simulation results showed that the heat released by heat exchanger decrease with increase the outside temperature and increase with increasing the lengths of pipe. Also, reduction with increasing in the diameter, and the coil design gives higher value of heat released by heat exchanger. However, the overall performance factor of EAHEs decreases by the increase of length of pipe and increases with increasing in the diameter and it can be obtained that the grid design gives best overall performance factor.