ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
In order to utilize low enthalpy geothermal heat sources, a thermosyphon is a gooddevice which can extract heat without using electric power. The heat transfer in the thermosyphonoccurs through the circulation of a working fluid through a sequence of evaporation, vapor transfer,condensation, and liquid return. A two-phase thermosyphon system using carbon dioxide (CO2) as aworking fluid has been investigated both experimentally as well as theoretically. Carbon dioxide isthe only non-flammable and non-toxic fluid that has the potential to offer environmental safety in asystem. A copper tube thermosyphon of total length of 1,000 mm with inside and outside diametersof 9.9 mm and 12.7 mm was developed by consisting of evaporator and condenser sections. Thetemperature distribution along the thermosyphon was monitored and theninput heat to evaporatorsection and output heat from condenser were measured as well. The effects of temperaturedifference between evaporator and condenser section and coolant mass flow rates on theperformance of the thermosyphon were determined. The results indicate that the heat fluxtransferred increased with increasing coolant mass flow rate and temperature difference betweenevaporation and condenser section. The experimental analysis of the thermosyphon system confirmsthat the proposed system must be a reliable and highly efficient as well as environmentally friendlyalternative to common ground-coupled systems
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.569.345.pdf
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