Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 718-731 |
| Number of pages | 14 |
| Journal | Solar Energy |
| Volume | 153 |
| Early online date | 20 Jun 2017 |
| DOIs | |
| Publication status | Published - 1 Sep 2017 |
Keywords
- Solar collector
- solar absorber
- single pass
- double pass
- thermal
- flat panel
- heat transfer
- laminar
- turbulent
- microchannel
- serpentine
- pressure drop
- pumping power
- optimisation
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- 10.1016/j.solener.2017.05.030Licence: CC BY
- Optimal passage size for solar collector absorbers - UIRAccepted author manuscript, 1.5 MBLicence: CC BY
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Optimal passage size for solar collector micro-channel and tube-on-plate absorbers. / Moss, Roger; Shire, Stan; Henshall, Paul; Eames, Phillip; Arya, Farid; Hyde, Trevor.
In: Solar Energy, Vol. 153, 01.09.2017, p. 718-731.Research output: Contribution to journal › Article › peer-review
TY - JOUR
T1 - Optimal passage size for solar collector micro-channel and tube-on-plate absorbers
AU - Moss, Roger
AU - Shire, Stan
AU - Henshall, Paul
AU - Eames, Phillip
AU - Arya, Farid
AU - Hyde, Trevor
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PY - 2017/9/1
Y1 - 2017/9/1
N2 - Solar thermal collectors for buildings use a heat transfer fluid passing through heat exchange channels in the absorber. Flat plate absorbers may pass the fluid through a tube bonded to a thermally conducting plate or achieve lower thermal resistance and pressure drop by using a flooded panel or microchannel design. The pressure drop should be low to minimise power input to the circulating pump.A method is presented for choosing the optimum channel hydraulic diameter subject to geometric similarity and pumping power constraints; this is an important preliminary design choice for any solar collector designer. The choice of pumping power is also illustrated in terms of relative energy source costs.Both microchannel and serpentine tube systems have an optimum passage diameter, albeit for different reasons. Double-pass and flooded panel designs are considered as special microchannel cases. To maintain efficiency, the pumping power per unit area must rise as the passage length increases. Beyond the optimum pumping power the rise in operating cost outweighs the increase in collector efficiency.
AB - Solar thermal collectors for buildings use a heat transfer fluid passing through heat exchange channels in the absorber. Flat plate absorbers may pass the fluid through a tube bonded to a thermally conducting plate or achieve lower thermal resistance and pressure drop by using a flooded panel or microchannel design. The pressure drop should be low to minimise power input to the circulating pump.A method is presented for choosing the optimum channel hydraulic diameter subject to geometric similarity and pumping power constraints; this is an important preliminary design choice for any solar collector designer. The choice of pumping power is also illustrated in terms of relative energy source costs.Both microchannel and serpentine tube systems have an optimum passage diameter, albeit for different reasons. Double-pass and flooded panel designs are considered as special microchannel cases. To maintain efficiency, the pumping power per unit area must rise as the passage length increases. Beyond the optimum pumping power the rise in operating cost outweighs the increase in collector efficiency.
KW - Solar collector
KW - solar absorber
KW - single pass
KW - double pass
KW - thermal
KW - flat panel
KW - heat transfer
KW - laminar
KW - turbulent
KW - microchannel
KW - serpentine
KW - pressure drop
KW - pumping power
KW - optimisation
U2 - 10.1016/j.solener.2017.05.030
DO - 10.1016/j.solener.2017.05.030
M3 - Article
VL - 153
SP - 718
EP - 731
JO - Solar Energy
JF - Solar Energy
SN - 0038-092X
ER -