AI SearchAugmentation of heat transport by using fluidized particles
Call Number: AIT RSPR no. ET-87-16 Material type:
SeriesSeries: Asian Institute of Technology. Research studies project report ; no. ET-87-16Publication details: Bangkok : Asian Institute of Technology, 1987Description: 67 pSubject(s): Online resources: Dissertation note: Research Studies Project Report (M. Eng..) - Asian Institute of Technology, 1987 Summary: The concept of utilizing fluidized beds of granular particles in heat exchangers as a means of preventing scale formation in contaminated waters has been investigated. With the bed maintained on the contaminated water side of the heat exchanger, the tube surfaces have been found to remain free of scale throughout in the range being studied. Chemically treated water is used in the experiments to promote rapid fouling. One group of chemicals used comprises calcium chloride, sodium chloride and sodium bicarbonate . Another group of chemicals used comprises calcium carbonate, calcium sulphate and sodium bicarbonate. Experiments are conducted on vertical model fluidized bed heat exchanger having sand of different sizes: 0. 356 mm, 0. 675 mm and 0 . 925 mm. By varying the flow rate of hot water in the inner pipe, the overall heat transfer coefficient within the range tested are 2. 75, 1. 35 and 1. 27 KW/m2 ° C for the 0. 356 mm, 0. 675 mm and 0. 925 mm sand bed respectively. Heat transfer coefficients are high due to the presence of the bed particles. In tests on double pipe heat exchanger, moderate fouling occurs on the heat transfer surface after a running period of 50 hours accom~any by a reduction in heat transfer coefficient. No fouling occurs on the fluidized bed heat exchanger during the test period.
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22-AIT Thesis (Replacement)
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Asian Institute of Technology Library AIT Publications | AIT RSPR no. ET-87-16 (Browse shelf(Opens below)) | 3 | Available | 30050120614739 | |||||||||||||
40-Archives
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Asian Institute of Technology Library Archives | AIT RSPR no. ET-87-16 (Browse shelf(Opens below)) | Available | 30050160016043 |
A research study (6 credits) submitted in partial fulfillment of the requirement for the degree of Master of Engineering, School of Environment, Resources and Development
Research Studies Project Report (M. Eng..) - Asian Institute of Technology, 1987
The concept of utilizing fluidized beds of granular particles in heat exchangers as a means of preventing scale formation in contaminated waters has been investigated. With the bed maintained on the contaminated water side of the heat exchanger, the tube surfaces have been found to remain free of scale throughout in the range being studied. Chemically treated water is used in the experiments to promote rapid fouling. One group of chemicals used comprises calcium chloride, sodium chloride and sodium bicarbonate . Another group of chemicals used comprises calcium carbonate, calcium sulphate and sodium bicarbonate. Experiments are conducted on vertical model fluidized bed heat exchanger having sand of different sizes: 0. 356 mm, 0. 675 mm and 0 . 925 mm. By varying the flow rate of hot water in the inner pipe, the overall heat transfer coefficient within the range tested are 2. 75, 1. 35 and 1. 27 KW/m2 ° C for the 0. 356 mm, 0. 675 mm and 0. 925 mm sand bed respectively. Heat transfer coefficients are high due to the presence of the bed particles. In tests on double pipe heat exchanger, moderate fouling occurs on the heat transfer surface after a running period of 50 hours accom~any by a reduction in heat transfer coefficient. No fouling occurs on the fluidized bed heat exchanger during the test period.
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