EFFECT OF THERMOSYPHON HEAT EXCHANGER ON THE PERFORMANCE OF HVAC SYSTEMS IN SUBTROPICAL CLIMATIC – NUMERICAL INVESTIGATION

Q3 Engineering

Journal of Mechanical Engineering Research and Developments Pub Date : 2019-08-29 DOI:10.26480/jmerd.05.2019.148.152

A. Ahmed, A. Eidan, Assaad Alsahlani, Entihaa R. Aga, M. Al-fahham

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Abstract

This work presents a theoretical study about the advantages of using thermosyphon heat exchanger (THEs) in the subtropical region (Iraq- Basrah) HVAC systems, where the weather is extremely hot with a normal DBT at (35-50) oC and RH of (35-90) %. The theoretical study compares three cases as follows: case (1) HVAC system that uses the precooling a refrigeration system and for the reheating process an electric heater, case (2) a HVAC system that uses for the precooling a refrigeration system and for reheating the condenser of the same refrigeration system used for precooling and case (3) for the precooling and preheating a thermosyphone system is used. The three cases are mathematically modeled, and corresponding programs are developed in Engineering Equation software. The input data in the programs is obtained experimentally form a facility corresponding to case 3) which is established in the Technical Institute of Najaf, Iraq. Preliminary results point out that the power consumption for case (3) is lower than the one for case (2). The power consumption for case (2) is lower than the one for case (1).

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热虹吸式换热器对亚热带气候条件下暖通空调系统性能影响的数值研究

本文对在亚热带地区(伊拉克-巴士拉)暖通空调系统中使用热虹吸换热器(THEs)的优势进行了理论研究，该地区天气异常炎热，DBT为(35-50)℃，相对湿度为(35-90)%。理论研究比较了以下三种情况:情况(1)暖通空调系统使用预冷制冷系统，再加热过程使用电加热器;情况(2)暖通空调系统使用预冷制冷系统并对用于预冷的同一制冷系统的冷凝器进行再加热;情况(3)使用热虹吸系统进行预冷和预热。对这三种情况进行了数学建模，并在工程方程软件中编制了相应的程序。程序中的输入数据是在伊拉克纳杰夫技术研究所建立的与案例3相对应的设施中通过实验获得的。初步结果表明，情形(3)的功耗低于情形(2)，情形(2)的功耗低于情形(1)。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Mechanical Engineering Research and Developments Engineering-Computational Mechanics

自引率

0.00%

发文量

审稿时长

9 weeks

期刊介绍： The scopes of the journal include, but are not limited to, the following topics: • Thermal Engineering and Fluids Engineering • Mechanics • Kinematics, Dynamics, & Control of Mechanical Systems • Mechatronics, Robotics and Automation • Design, Manufacturing, & Product Development • Human and Machine Haptics Specific topics of interest include: Advanced Manufacturing Technology, Analysis and Decision of Industry & Manufacturing System, Applied Mechanics, Biomechanics, CAD/CAM Integration Technology, Complex Curve Design, Manufacturing & Application, Computational Mechanics, Computer-aided Geometric Design & Simulation, Fluid Dynamics, Fluid Mechanics, General mechanics, Geomechanics, Industrial Application of CAD, Machinery and Machine Design, Machine Vision and Learning, Material Science and Processing, Mechanical Power Engineering, Mechatronics and Robotics, Artificial Intelligence, PC Guided Design and Manufacture, Precision Manufacturing & Measurement, Precision Mechanics, Production Technology, Quality & Reliability Engineering, Renewable Energy Technologies, Science and Engineering Computing, Solid Mechanics, Structural Dynamics, System Dynamics and Simulation, Systems Science and Systems Engineering, Vehicle Dynamic Performance Simulation, Virtual-tech Based System & Process-simulation, etc.