Normalized charging exergy performance of stratified sensible thermal stores

Solar Energy ◽  
2016 ◽  
Vol 136 ◽  
pp. 487-498 ◽  
Author(s):  
H.O. Njoku ◽  
O.V. Ekechukwu ◽  
S.O. Onyegegbu
Keyword(s):  
Thermal Stores ◽  
Exergy Performance

Exergy performance analysis of solar photovoltaic thermal (PV/T) air collectors in terms of exergy losses

2011 ◽  
Vol 84 (3) ◽  
pp. 132-145 ◽  
Author(s):  
A Namjoo ◽  
F Sarhaddi ◽  
F Sobhnamayan ◽  
M A Alavi ◽  
M Mahdavi Adeli ◽  
...  
Keyword(s):  
Performance Analysis ◽  
Solar Photovoltaic ◽  
Exergy Performance ◽  
Exergy Losses

Negatively Buoyant Plume Flow in a Baffled Heat Exchanger

2010 ◽  
Vol 132 (3) ◽  
Author(s):  
Sandra K. S. Boetcher ◽  
F. A. Kulacki ◽  
Jane H. Davidson
Keyword(s):  
Heat Exchanger ◽  
Effective Width ◽  
Two Dimensional ◽  
Buoyant Plume ◽  
Fully Developed Flow ◽  
Buoyant Flow ◽  
Thermal Stores ◽  
Plume Flow ◽  
Rayleigh Numbers ◽  
Negatively Buoyant

A numerical simulation of transient two-dimensional negatively buoyant flow into a straight baffle situated below an isothermal circular cylinder in an initially isothermal enclosure is presented for both an adiabatic and a highly conducting baffle for Rayleigh numbers from 106 to 107. Results show the effects of baffle offset, width, and length on the point where viscous flow develops and on velocity profiles within the baffle. Results are interpreted to guide the design of straight baffles to reduce destruction of stratification in thermal stores using an immersed heat exchanger. The preferred geometry is a low-conductivity baffle of width equal to the effective width of the heat exchanger and 15 or more cylinder diameters in length to ensure nearly fully developed flow at the baffle outlet.

Exergy performance assessment of a linear parabolic trough photovoltaic thermal collector

2019 ◽  
Vol 138 ◽  
pp. 1028-1041 ◽  
Author(s):  
Mohammad Valizadeh ◽  
Faramarz Sarhaddi ◽  
Mohsen Mahdavi Adeli
Keyword(s):  
Performance Assessment ◽  
Parabolic Trough ◽  
Exergy Performance
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