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Please use this identifier to cite or link to this item: http://eprint.iitd.ac.in/handle/2074/2454

Title: Performance calculations for closed-loop air-to-water solar hybrid heating systems with and without a rock bed in the solar air heater
Authors: Choudhury, C
Garg, H P
Keywords: transient analysis
hybrid solar water heater
rock bed air heater
air-to-water transverse
fin shell-and-tube heat exchanger
Issue Date: 1993
Citation: Renewable Energy, 3(8), 897-905p.
Abstract: A transient analysis has been carried out on a hybrid solar water heater which comprises a rock bed air heater with optimum design parameters in conjunction with an air-to-water transverse fin shell-and-tube heat exchanger (mixed air and unmixed water type) in which cold water from the storage tank receives heat from the hot air coming out of the air heater which flows in the shell at right angles to the water flowing in the tubes. The system's performance has been evaluated for typical winter weather conditions in Delhi for different combinations of flow rates of air and water for different volumes of the water storage tank. No hot water is assumed to be withdrawn from the tank to serve the load. A comparative analysis of the system's performance with and without a rock bed in the air heater reveals about 11°C higher temperature of storage tank in the former at 50 kg/h m2 air flow rate. With both the air heater types, although the system performance was observed to increase with the rates of air and water flow, no significant improvement in system performance was achieved at Mw > 2Ma.
URI: http://eprint.iitd.ac.in/dspace/handle/2074/2454
Appears in Collections:Energy Studies [CES]

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