Assessment of Thermal Performance of Non-Evaporative Cooling System Assisted with TEC Models at High Temperature Climate Hussam H. Jabbar 1,a,* , Mohammed A. Al-Tayyar 2,b , Taif M. Mansoor 3,c , Saif W. Mohammed Ali 4,d 1 Department of Cooling and Air Conditioning Engineering, Imam Ja’afar Al-Sadiq University, Baghdad, Iraq. 2 University of Al-Kafeel, College of Technical Engineering, Iraq 3 Sulaimani Polytechnic university, Sulaimani Technical Institute, Mechanic Department, Sulaymaniyah, Iraq. 4 University of Kufa, Faculty of Engineering, Department of Mechanical Engineering, Kufa, Najaf, Iraq. a hussam.jabbar@sadiq.edu.iq, b Mohammed.altayyar@alkafeel.edu.iq, c taif.majeed@spu.edu.iq, d saifw.alturaihi@uokufa.edu.iq Keywords: TEC modeling, Integrated-air conditioning system with TEC, numerical study of TEC model, TEC units for space cooling, TEC as CPU cooler, Peltier and Seebeck effect. Abstract. In this work, a non-evaporative cooling system is used with an assisted thermoelectric cooler (TEC) devices module. The system was proposed as an alternative cooling system in the high temperature climate to overcome the high energy consumption of traditional air-conditioning compression cycle. The open source Open FOAM V.9 was used to solve the transient effect of 3D model of indirect non-evaporative cooling system. The primary air temperature was set to 319 °. While, the air flow was tested under four different air inlet velocities: 0.75 m/s, 1 m/s, 1.25 m/s, and 1.5 m/s. the validation shows good and acceptable agreement in COP values of the system with both experimental and theoretical works from literature within an error between (12.9 % and 9.5 %). Results show that the temperate difference value on a slice through the length of the air channel starts to decrease as velocity increasing. For example, at the last timesteps of each velocity, the temperature difference reaches about (~10 o K) when velocity is (0.75 m/s) starting from the first quarter of the channel, while the same difference in temperature not reached until the half way of the channel from the channel inlet when velocity is (1.5 m/s). Revealing that even though the percentage increase in the velocity is about 50%, the change in the temperature difference value between the inlet and outlet of the channel is about 1.2%. The local Nusselt number (  ) shows that steady state heat transfer reached very quickly as the velocity increased (i.e., at 0.75 m/s at 12s while for 1.5 m/s at 4s). Notwithstanding, as the time processed the (  ) increases for all cases but becomes lower as the velocity increased. 1. Introduction The increasing of the demand of air-conditioning for buildings and facilities in the recent years led to increasing of power consumption due to using the compression refrigeration and air-conditioning cycles. The efforts to find an alternative system with less power consumption and to reduce the negative effect of global warming is still underway. One of promising development in this area is by using hybrid air cooling systems integrated with thermoelectric devices as an assisted cooling devices for the direct and indirect evaporative cooling system. Thermoelectric Devices (TED’s) are semiconductors that consist of two types of legs; P-type and N-type which are connected in electrical serial. Due to the Peltier effect (reverse of Seebeck effect), the arrangement will produce cooling in one side and heating in the other side. In order to get the benefit of this effect, each side is connected thermally in parallel. Recently, the application of TEDs’ are used variously in different applications. Due to low energy conversion of these TED’s, it Applied Mechanics and Materials Submitted: 2023-01-05 ISSN: 1662-7482, Vol. 914, pp 41-52 Accepted: 2023-01-05 doi:10.4028/p-etqapz Online: 2023-05-15 © 2023 Trans Tech Publications Ltd, Switzerland All rights reserved. No part of contents of this paper may be reproduced or transmitted in any form or by any means without the written permission of Trans Tech Publications Ltd, www.scientific.net. (#617488090-19/05/23,09:37:14)