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Keywords: natural convection
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Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Sol. Energy Eng. April 2020, 142(2): 021008.
Paper No: SOL-19-1240
Published Online: October 31, 2019
... and spacing between the fins, while the heat transfer and fluid flow are directed by natural convection. An inclined rectangular channel similar to the dimensions of a typical solar air heater has been considered. Three different fin configurations, namely, continuous long fins for the whole length...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Sol. Energy Eng. August 2014, 136(3): 031001.
Paper No: SOL-12-1254
Published Online: January 10, 2014
... with the increase in the fin number and fin height. Also, results show that increasing exit diameter is a favorable factor from the first-law efficiency viewpoint, while it has an unfavorable effect on the second-law efficiency. photovoltaic/thermal (PV/T) collector natural convection first law efficiency...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Sol. Energy Eng. February 2014, 136(1): 011017.
Paper No: SOL-12-1182
Published Online: November 26, 2013
... D  ≤ 10 7 in order to determine optimal shroud and baffle configurations. It was found that a baffle width of 75% of the width of the heat exchanger provided the best heat transfer performance. natural convection thermal storage tanks baffle shroud immersed heat exchanger Solar...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Sol. Energy Eng. February 2012, 134(1): 011014.
Published Online: November 29, 2011
... and exergy efficiency of the studied system. 27 04 2011 21 09 2011 29 11 2011 29 11 2011 exergy photovoltaic cells solar absorber-convertors photovoltaic/thermal solar collector natural convection glass cover thermal efficiency electrical efficiency exergy...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Sol. Energy Eng. February 2012, 134(1): 011010.
Published Online: November 29, 2011
... illustrated here for several cases can be extended to any immersed heat exchanger for which the storage-side natural convection poses the greatest thermal resistance to heat transfer. Normally this situation will occur when flow through the heat exchanger is turbulent, which is typically the case for copper...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Sol. Energy Eng. February 2010, 132(1): 011010.
Published Online: January 4, 2010
..., especially in the state close to the critical point. Thus, natural convective flow of the supercritical carbon dioxide can be easily induced by solar heating or water cooling. Such convective flow absorbs and transports heat to water in solar collector tubes. Motivated by the above idea, an experimental...
Journal Articles
Publisher: ASME
Article Type: Technical Briefs
J. Sol. Energy Eng. May 2009, 131(2): 024502.
Published Online: March 25, 2009
...Cynthia A. Cruickshank; Stephen J. Harrison This paper presents a simplified test method that was developed to allow preconfigured solar domestic hot water systems that use natural convection/thermosyphon heat exchangers to be characterized. The results of this test method produce performance...
Journal Articles
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Sol. Energy Eng. May 2006, 128(2): 178–188.
Published Online: September 6, 2005
... materials numerical analysis forced convection natural convection heat conduction thermal energy storage Warm and desert climates are characterized by rather high temperatures during the daytime, and in order to provide thermal comfort conditions inside buildings air conditioners are usually...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Sol. Energy Eng. February 2006, 128(1): 83–89.
Published Online: April 2, 2005
... is not included. Thermal plumes or vertical mixing generated by heating or cooling on the walls are ignored. A two-layer structure will not be destroyed in any case. Wind effect is not combined in this model. Natural convection is assumed on all interior surfaces. Displacement of natural...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Sol. Energy Eng. February 2005, 127(1): 21–28.
Published Online: February 7, 2005
...W. Liu; J. H. Davidson, Fellow of ASME; F. A. Kulacki, Fellow of ASME Natural convection is measured in an enclosure that represents an integral collector storage system (ICS) with an immersed tube-bundle heat exchanger. Heat transfer coefficients for bundles of 240 tubes contained in a thin...
Journal Articles
Publisher: ASME
Article Type: Technical Briefs
J. Sol. Energy Eng. August 2005, 127(3): 421–424.
Published Online: November 1, 2004
... cooling natural convection Polymer materials may offer cost savings as substitutes for metal absorber plates in traditional collector systems or as part of all-polymer systems. In fact, flat-plate collectors that use polymeric absorbers are reaching the market in Europe ( 1 ). It is possible...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Sol. Energy Eng. May 2004, 126(2): 702–709.
Published Online: May 4, 2004
...W. Liu; J. H. Davidson, Fellow of ASME,; F. A. Kulacki, Fellow of ASME, Natural convection heat transfer coefficients for a rectangular array of eight tubes contained in a thin enclosure of aspect ratio 9.3:1 and inclined at 30 deg to the horizontal are measured for a range of transient operating...
Journal Articles
Publisher: ASME
Article Type: Technical Papers
J. Sol. Energy Eng. May 2003, 125(2): 190–194.
Published Online: May 8, 2003
...Pai-Chuan Liu The knowledge of steady-state temperature distribution is known a priori for natural convection stability analysis. The present study determines the temperature profiles in an infinite horizontal layer of fluid filled with saturated porous medium confined between two convective...
Journal Articles