Experimental evaluation of an indirect type solar dryer for agricultural use in rural communities: Relative humidity comparative study under winter season in tropical climate with sensible heat storage material

A single basin single slope solar still with 0.82mx 0.81m x 0.75m has been fabricated with G.I sheet and tested with different water depths of 2,3,4cm. Various solid and liquid sensible heat storage materials, Evaporative surface materials are used in the form of billets, in the still. To reduce glass cover temperature the outer glass was cooled by using sprinkler manually at regular interval of time. Theoretical analysis was performed and compared with experimental values. The performances of modified still were compared with conventional still of same size running under the same meteorological conditions. The solid sensible heat storage materials produces48% more productivity than conventional still. Liquid sensible heat storage material produces 19% more than conventional in till. The payback period of the still was 340 days.

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Transient Response of Solid Sensible Heat Thermal Storage Units—Single Fluid

Journal of Heat Transfer ◽

10.1115/1.3450578 ◽

1976 ◽

Vol 98 (3) ◽

pp. 471-477 ◽

Cited By ~ 17

Author(s):

F. W. Schmidt ◽

J. Szego

Keyword(s):

Transient Response ◽

Heat Storage ◽

Transient Behavior ◽

Outlet Temperature ◽

Sensible Heat ◽

Storage Material ◽

Storage Unit ◽

Cross Sectional ◽

Flowing Fluid ◽

Heat Storage Material

The transient response of a solid sensible heat storage unit which receives or supplies heat to a single flowing fluid is presented. The storage unit is composed of a number of rectangular cross-sectional channels for the flowing fluid, connected in parallel and separated by the heat storage material. The energy equation for the fluid and the transient conduction equation for the storage material are solved using finite difference techniques. The parameters which characterize the transient behavior of these units are identified. Results suitable for the prediction of the rate of heat storage and the outlet temperature of the fluid leaving the storage unit are presented as functions of the identified nondimensional parameters.

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Improving the performance of a parabolic concentrator solar tracking-tubular solar still (PCST-TSS) using gravel as a sensible heat storage material

Desalination ◽

10.1016/j.desal.2019.114182 ◽

2020 ◽

Vol 473 ◽

pp. 114182 ◽

Cited By ~ 18

Author(s):

Mohamed Elashmawy

Keyword(s):

Heat Storage ◽

Sensible Heat ◽

Solar Still ◽

Storage Material ◽

Solar Tracking ◽

Heat Storage Material

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Transient Behavior of a Solid Sensible Heat Thermal Storage Exchanger

Journal of Heat Transfer ◽

10.1115/1.3450489 ◽

1978 ◽

Vol 100 (1) ◽

pp. 148-154 ◽

Cited By ~ 3

Author(s):

J. Szego ◽

F. W. Schmidt

Keyword(s):

Heat Storage ◽

Thermal Response ◽

Transient Behavior ◽

Inlet Temperature ◽

Sensible Heat ◽

Storage Material ◽

Storage Unit ◽

Response Characteristics ◽

Rectangular Channels ◽

Heat Storage Material

The transient response characteristics of a solid sensible heat storage exchanger which interacts with two energy transporting fluids are presented. The storage unit is composed of a series of large aspect ratio rectangular channels for the fluids, separated by slabs of the heat storage material. The hot and cold fluids flow in counter current fashion, in alternate channels so that each slab of storage material is in contact with both fluids. The entire system is considered to be initially in equilibrium at a uniform temperature, a step change in the inlet temperature of one of the fluids is imposed, and the thermal response of the unit is predicted until steady state conditions are reached. The response of the storage exchanger to an arbitrary time variation of one of the fluids’ inlet temperature may be obtained using superposition.

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