JP Journal of Heat and Mass Transfer
Volume 21, Issue 1, Pages 95 - 123
(October 2020) http://dx.doi.org/10.17654/HM021010095 |
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MODELING AND INVESTIGATION OF HEAT EXCHANGER DESIGN TO RECOVER THE WASTE HEAT OF BIOMASS PLANT
Khalideh Al Bkoor Alrawashdeh, La’aly A. Al-Samrraie, Abdullah A. Alshorman, Isam Qasem, Saleh Shakhatreh and Katarzyna Slopiecka
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Abstract: Waste heat recovering from the biomass plant requires a robust design of the heat exchanger. This study presents the design of the flue gas - water heat exchanger (FGWHE) to recover the waste heat from biomass (wood and organic residue) obtained by burning them in the external combustion chamber to regenerate hot water. In the investigation and design calculation, the MatLab is used based on the overall heat transfer area coefficient. The primary purpose of this study is to obtain a high stable heat transfer rate and the allowable dimensions by examining the characteristics of FGWHE over the exit temperature of water (Two) in the range of 50-80ºC. Specific design considerations were used to illustrate the effect of the tube pass number on the thermal characteristics of the FGWHE. The second stage is to obtain the best configuration tube diameter (dt). The last stage of calculation is used to find the effect of tube dimensions on the total annual cost. The results showed that the tube pass number is a critical issue to achieve a higher over-all heat transfer coefficient at allowable dimensions, where the single pass with lower dt (3/4”) permits a higher heat transfer. A dt of 1”1/4” required a lower total annual cost. The increasing pass number permits a higher heat transfer area. A lower two conjunction with a higher heat transfer coefficient.
Novelty statement
This study provides new data about the potential of FGWHE to recover the waste heat, considering the investigation of the main thermal characteristics. |
Keywords and phrases: heat exchanger, genetic algorithm, FGWHE, mathematical model, MatLab code.
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