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Keyword: heat losses
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Journal Articles
Article Type: Technical Briefs
J. Sol. Energy Eng. February 2012, 134(1): 014502.
Published Online: November 29, 2011
.... A brief summary of solar energy source and heat transfer equations for the Olympic pools are given. An Olympic swimming pool is assumed to be in different cities, and energy losses are calculated. For our sample Olympic pool, convective heat loss obtained is −3.86 kW and evaporative heat loss...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. February 2012, 134(1): 011012.
Published Online: November 29, 2011
... temperature. The thermal efficiency can be determined by testing the collector under actual operating conditions or by separately measuring these two components. This paper describes how outdoor measurement of the optical efficiency is combined with laboratory measurements of receiver heat loss to obtain the...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. August 2011, 133(3): 031015.
Published Online: July 28, 2011
... vacuum and thereafter suffer from significant convective heat loss. An alternative to this design is to use a vacuum pump to actively maintain low pressure in a long section of absorber with a continuous vacuum jacket. A detailed thermal model of such a configuration is needed to inform design efforts...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. August 2011, 133(3): 031019.
Published Online: July 28, 2011
.... The test results confirm the full functionality of the storage subsystem, the ability to perform cycling at high discharge heat rates and relatively low heat losses, supporting the view that the technology represents a promising basis for up-scaled implementations. Measurement data and simulation...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. August 2010, 132(3): 031006.
Published Online: June 14, 2010
... operating experience it has gained over the last two decades. Recently, researchers found that trough plants that use organic heat transfer fluids (HTFs) such as Therminol VP-1 are experiencing significant heat losses in the receiver tubes. The cause has been traced back to the accumulation of excess...
Journal Articles
Article Type: Research Papers
J. Sol. Energy Eng. May 2008, 130(2): 021007.
Published Online: March 10, 2008
...Eckhard Lüpfert; Klaus-J. Riffelmann; Henry Price; Frank Burkholder; Tim Moss The heat loss of a receiver in a parabolic trough collector plays an important role in collector performance. A number of methods have been used to measure the thermal loss of a receiver tube depending on its operating...
Journal Articles
Article Type: Technical Papers
J. Sol. Energy Eng. February 2005, 127(1): 29–36.
Published Online: February 7, 2005
... the indicated efficiency reduces because of the increase in the heat loss due to water vaporization and condensation processes. Contributed by the Solar Energy Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF SOLAR ENERGY ENGINEERING . Manuscript...
Journal Articles
Article Type: Technical Papers
J. Sol. Energy Eng. November 2004, 126(4): 1101–1104.
Published Online: November 18, 2004
... top of the collector. This is an initial phase of the work and only winds aligned with the solar collector are investigated. In other words no influence of lateral winds is accounted for. The first experimental results proved very encouraging. It was observed a 12% heat-loss reduction in comparison...
Journal Articles
Article Type: Technical Papers
J. Sol. Energy Eng. May 2004, 126(2): 812–818.
Published Online: May 4, 2004
...Viorel Badescu A solar stirling engine based on a horizontal selective flat-plate converter is analyzed in this work. A detailed model for the heat losses towards the atmosphere is presented. The engine’s output power is maximised numerically. The analysis is based on meteorological data measured...
Journal Articles
Article Type: Technical Papers
J. Sol. Energy Eng. May 2004, 126(2): 801–807.
Published Online: May 4, 2004
...T. Taumoefolau; S. Paitoonsurikarn; G. Hughes; K. Lovegrove Natural convection heat loss inevitably occurs in cavity-type receivers in high concentrating solar dishes, downward focusing systems and solar towers. In most applications, it can contribute a significant fraction of total energy loss...
Journal Articles
Article Type: Technical Papers
J. Sol. Energy Eng. February 2003, 125(1): 2–12.
Published Online: January 27, 2003
... May 2002 27 01 2003 thermal energy storage optimal control ice power consumption load forecasting heat losses economics Ice storage is a method of shifting cooling loads from on-peak periods when electrical energy and demand costs are high, to off-peak periods when the cost...
Journal Articles
Article Type: Technical Papers
J. Sol. Energy Eng. August 2002, 124(3): 256–261.
Published Online: August 1, 2002
... anemometer/resistance thermometer measurements, to determine the heat loss to the air stream over the plate as a function of wind speed, suction velocity, and plate geometry. Both attached and separated flow regimes were observed, and the criterion for flow attachment was determined to be Re V 0 , P ⩾ 6.93...
Journal Articles
Article Type: Technical Papers
J. Sol. Energy Eng. August 2002, 124(3): 262–267.
Published Online: August 1, 2002
... approach retains the convenience of the standard analysis while accounting for the unequal front/rear ambient temperatures and permits collector characterization in terms of the conventional parameters: plate efficiency factor, F ′ ; heat removal factor, F R ; overall heat loss coefficient, U L , and...
Journal Articles
Article Type: Technical Papers
J. Sol. Energy Eng. August 2002, 124(3): 311–314.
Published Online: August 1, 2002
... revision, April 2002. Associate Editor: A. Swift. 01 January 2001 01 April 2002 01 08 2002 solar absorber-convertors solar heating distillation thermal analysis flow visualisation convection heat losses The conventional double slope basin solar still is used to...
Journal Articles
Article Type: Technical Papers
J. Sol. Energy Eng. February 2002, 124(1): 51–54.
Published Online: June 1, 2001
... Apr 2001 01 June 2001 solar energy concentrators solar absorber-convertors mirrors heat losses The compound parabolic concentrators (CPC) were invented almost simultaneously by the Soviets V. K. Baranov and Melnikov, the Americans Roland Winston and H. Hinterberger, and the...
Journal Articles
Article Type: Technical Papers
J. Sol. Energy Eng. August 2001, 123(3): 200–210.
Published Online: March 1, 2001
... that the overall heat loss coefficient is constant. In other words, the temperature difference between the panel and the environment is linearly related to the heat flux on the panels (solar irradiance). The heat transfer characteristics of a rack-mounted PV module and a BIPV module can be quite...
Journal Articles
Article Type: Technical Papers
J. Sol. Energy Eng. February 2001, 123(1): 18–29.
Published Online: December 1, 2000
...Pirawas Chuangchid; Moncef Krarti General semi-analytical solutions for the steady-state heat conduction problems for circular and three-dimensional rectangular slab-on-grade floors with uniform insulation are presented. The soil temperature field, and the total slab heat loss are presented and...
Journal Articles
Article Type: Technical Papers
J. Sol. Energy Eng. May 2000, 122(2): 49–55.
Published Online: March 12, 2000
... Technical Editor: M. M. Rahman. 25 Mar 1999 12 Mar 2000 thermoelectric conversion thermoelectric devices space vehicle power plants heat losses solid electrolytes alumina Alkali Metal Thermal to Electric Conversion (AMTEC) technology is rapidly maturing for potential...