The Experimental Investigation of Double Pipe Heat Exchangers Prepared from Two Techniques

9th Thai Society of Mechanical Engineers, International Conference on Mechanical Engineering

Tongkratoke, A.^1 ; Pramuanjaroenkij, A.^1 ; Phankhoksoong, S.^1 ; Kakac, S.^2

Department of Mechanical and Manufacturing Engineering, Faculty of Science and Engineering, Kasetsart University, Chalermphrakiat Sakon Nakhon Province Campus, Sakon Nakhon

47000, Thailand^1

Department of Mechanical Engineering, TOBB University of Economics and Technology, Ankara

06560, Turkey^2

关键词: Double-pipe heat exchangers;    Experimental investigations;    Fabricating techniques;    Heat exchanger design;    Heat exchanger performance;    Heat transfer process;    Thermal efficiency;    Thermal Performance;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/501/1/012064/pdf
DOI  :  10.1088/1757-899X/501/1/012064

来源: IOP

【 摘 要 】

Heat exchangers are the equipment used in variety of industries at all levels related to heat and thermal systems. Using heat exchangers at maximum efficiency are to reduce the amount of energy lost that impacts on environment and manufacturing cost in the industry. This research focused on comparing performances of two heat exchangers; two double-pipe heat exchangers were fabricated domestically with two different welding techniques (flare and Argon welding techniques). Both heat exchangers were tested on the same experimental setup and investigated for their thermal efficiency. Their working fluid was water, hot water and cold water flowed inside the heat exchangers were arranged as parallel (co-current) and counter flow configurations. Thermal efficiency when hot water and cold water flow rates varied in the range from 0.5 to 2 liters per minute, were also investigated. The results showed that the second heat exchanger fabricated with the Argon-welding technique showed the better thermal performance than that of the first heat exchanger fabricated with the flare technique. The thermal performances of the second heat exchanger were varied from 92% to 99% while the performances of another heat exchanger were varied from 32% to 38%. Therefore, the heat exchanger manufacturing played an important role to the heat exchanger performance. The same heat exchanger design but different fabricating technique caused lost in heat transfer process which affected the thermal performance and operating cost of the industry.