8 results for “Closed-loop oscillating heat-pipe”

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Research ArticleOpen accessPhrase in the titleEffect of Evaporator Lengths and Ratio of Check Valves to Number of Turns on Internal Flow Patterns of a Closed-Loop Oscillating Heat-Pipe With Check ValvesS. Rittidech, P. Meena, P. TerdtoonA visualization study of the internal flow patterns of a closed-loop oscillating heat-pipe with check valves (CLOHP/CV) at normal operating condition for several evaporator lengths (Le), and ratio of check valves to number of turns (Rcv) has been conducted. This article describes the effects of varying Le, and Rcv on flow patterns. The CLOHP/CV used a Pyrex glass tube with … …American Journal of Applied Sciences, Vol. 5, Issue 3 · 31 Mar 2008 · 7,266 accessesView PDF Cite

Research ArticleOpen accessPhrase in the titleApplied a Closed-Loop Oscillating Heat-Pipe Heat Exchanger to Increasing Oil Yield in Pyrolysis ProcessN. Panyoyai, T. Wongsiriamnuay, S. SangsrichanProblem statement: A Closed-Loop Oscillating Heat-Pipe (CLOHP) heat exchanger was a heat exchanger with one of the most promising conductivity capacities because of its higher cooling and condensing potential. Therefore, the aims of this study were to design and fabricate a CLOHP to be applied to increasing oil yield in the pyrolysis process. Approach: Two types of oscillating heat-pipe arrangements-parallel … …Energy Research Journal, Vol. 1, Issue 1 · 30 Jun 2010 · 7,620 accessesView PDF Cite

Research ArticleOpen accessPhrase in the titleEffect of Inner Diameter and Inclination Angles on Operation Limit of Closed-Loop Oscillating Heat-Pipes with Check ValvesP. Meena, S. Rittidech, P. TammasaengThis research was to study the effect of inner diameter and inclination angles on operation limit of a closed loop oscillating heat pipes with check valves (CLOHP/CV). A set of CLOHP/CV was made of copper tubes in combination of following dimension: 1.77 and 2.03 mm inside diameter: 10 turn, with R123 was used as the working fluid. The working fluid … …American Journal of Engineering and Applied Sciences, Vol. 1, Issue 2 · 30 Jun 2008 · 7,145 accessesView PDF Cite

Research ArticleOpen accessEvery word in the titleEffect of Length Ratios on Heat Transfer Characteristics of Closed-Loop Oscillating Heat Pipe with Non-Uniform DiameterP. Sakulchangsatjatai, P. Pathike, P. TerdtoonProblem statement: Closed-loop oscillating heat pipe is a high performance heat exchanger especially as this heat exchanger has one direction flow of working fluid inside tube. Approach: This research studies the effect of length ratios on heat transfer characteristic of Closed Loop Oscillating Heat Pipe with Non-Uniform Diameter (CLOHP/NUD). The 2.03 and 1.06 mm inner diameter of capillary tube were … …Energy Research Journal, Vol. 1, Issue 2 · 31 Oct 2010 · 7,680 accessesView PDF Cite

Research ArticleOpen accessEvery word in the titleEffects of Aspect Ratios and Number of Meandering Turns on Performance Limit of an Inclined Closed-Loop Oscillating Heat PipeN. Panyoyai, P. Terdtoon, P. SakulchangsatjataiProblem statement: The purpose of this research was to determine the effects of aspect ratios and number of meandering turns on performance limit of an inclined closed-loop oscillating heat pipe. Approach: The Closed-Loop Oscillating Heat Pipe (CLOHP) was made of a long copper capillary tube. The geometrical sizes, which were the variable parameters of this study, were as follows; the … …Energy Research Journal, Vol. 1, Issue 2 · 31 Oct 2010 · 8,081 accessesView PDF Cite

Research ArticleOpen accessEvery word in the titleEffect of Evaporator Section Lengths and Working Fluids on Operational Limit of Closed Loop Oscillating Heat Pipes with Check Valves (CLOHP/CV)P. Meena, S. Rittidech, P. TammasaengThis research aims to the effect of evaporator section lengths and working fluids on operational limit of closed loop oscillating heat pipes with check valves (CLOHP/CV) with R123 Ethanol and Water were used as the working fluids. A set of CLOHP/CV was made of copper tubes in combination of following dimension: 1.77 mm inside diameter: 10 turns: 5, 10 and … …American Journal of Applied Sciences, Vol. 6, Issue 1 · 31 Jan 2009 · 7,776 accessesView PDF Cite

Research ArticleOpen accessEvery word in the titleWaste Heat Recovery by Closed-Loop Oscillating Heat Pipe with Check Valve from Pottery Kilns for Energy ThriftP. Meena, S. RittidechThis study aims to design, construct and test the waste heat recovery by closed-loop oscillating heat pipe with check valve from pottery kilns for energy thrift, were used the working fluids with a filling ratio of 50%. The (CLOHO/CV) was made of copper capillary tube with inside diameter of 2.03 mm. The lengths of evaporator and condenser section were 20 … …American Journal of Engineering and Applied Sciences, Vol. 1, Issue 2 · 30 Jun 2008 · 7,490 accessesView PDF Cite

Research ArticleOpen accessIn the keywordsMathematical Model of the Optimum Heat Pipe Heat Exchanger for a Condenser of Vapor-Compression Refrigeration CycleP. Yeunyongkul, P. Sakulchangsatjatai, P. TerdtoonProblem statement: This study theoretically investigated applying heat pipe as a heat exchanger in the condenser of vapor compression refrigeration system for sustainable well-being. Split-type air conditioner for residential propose was considered. To reduce pressure drop and recover heat from the condensing process of the refrigeration cycle, this investigation tried to use Closed Loop Oscillating Heat Pipe (CLOHP) instead of … …Energy Research Journal, Vol. 1, Issue 2 · 31 Oct 2010 · 8,631 accessesView PDF Cite