Transient Behavior of a Solid Sensible Heat Thermal Storage Exchanger

1978 ◽  
Vol 100 (1) ◽  
pp. 148-154 ◽  
Author(s):  
J. Szego ◽  
F. W. Schmidt

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.

1976 ◽  
Vol 98 (3) ◽  
pp. 471-477 ◽  
Author(s):  
F. W. Schmidt ◽  
J. Szego

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.


2016 ◽  
Author(s):  
Iñigo Ortega-Fernández ◽  
Abdessamad Faik ◽  
Karthik Mani ◽  
Javier Rodriguez-Aseguinolaza ◽  
Bruno D’Aguanno

2020 ◽  
Vol 28 (1) ◽  
pp. 611-624 ◽  
Author(s):  
Gurukarthik Babu Balachandran ◽  
Prince Winston David ◽  
Gokul Rajendran ◽  
Mohamed Nasrulla Akbar Ali ◽  
Vignesh Radhakrishnan ◽  
...  

1977 ◽  
Vol 99 (2) ◽  
pp. 174-179 ◽  
Author(s):  
F. W. Schmidt ◽  
R. R. Somers ◽  
J. Szego ◽  
D. H. Laananen

The optimization of the design of a solid sensible heat storage unit initially at a uniform-temperature 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 complex method for constrained nonlinear optimization as presented by M. J. Box is utilized, with some modifications. The design optimization is based upon achieving maximum utilization of the heat storage or removal capabilities of the material for a given set of operating conditions. This is achieved by varying the storage unit’s geometry while placing constraints on the maximum and minimum length of the unit, fluid channel size, storage material thickness, maximum and minimum outlet fluid temperature, and the minimum amount of heat to be stored.


2005 ◽  
Vol 27 (14) ◽  
pp. 1357-1366 ◽  
Author(s):  
Huseyin Gunerhan ◽  
Arif Hepbasli

2014 ◽  
Vol 592-594 ◽  
pp. 2374-2378
Author(s):  
A. Senthil Rajan ◽  
K. Raja

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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