Self controlling, self pumping heat circulation system study. Final report, August 1, 1977-July 31, 1978

Wachtell, G. P.

doi:10.2172/5322265

Cited by 2 publications

(2 citation statements)

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“…Figure 10 is a plot of average daily energy output of the system, based on heat across the condenser (Qcond• MJ), as a function of solar energy input to the system (Qsolar• MJ). Linear correlations for this data are : Qcond = 0.26{Qsolarl -1.8 (3) with a correlat i on coefficient of 0.8 for the selfpumping system, and Qcond = 0.37{Qsolarl -2.8 (4) with a correlat i on coefficient of 0. 9 for the mechanical-pumping system.…”

Section: Seasonal Perfonnancementioning

confidence: 91%

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Experimental Study of a Self-Pumping Boiling Collector Solar Hot Water System

Davidson

Walker

Löf

1989

Journal of Solar Energy Engineering

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An experimental study of a pilot scale passive solar hot ~ater heating system utilizing a boiling collector is presented.The self-pumping system alternates between two modes of operation. During the run . cycle, vapor pressure drives the evaporated refr1gerant downward from the collector to the condenser.Once a preset quantity of refrigerant is condensed, vapor pressure is again used to force the return of the cond~nsate to t~e collector during the pump cycle .. The pilot .system is optionally configured ~o operate with a mechanical pump . Experimental results i~cl~de measurements of temperatures and pressures withi~ the system a~ well as thermal input and output energ ies. The loss in thermal efficiency due to the use of vapor p~essure to return liquid refrigerant to the collec~or is ~ssessed by comparing self-pumping and mechanical-pumping operation. Performance of the selfpumping system is strongly influenced by transient ~herma~ lo.sse.s..Refinement of the system design, including i.nd1vidual components, is required to reduce losses and 1mprove performance.

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Section: Seasonal Perfonnancementioning

confidence: 91%

“…A comprehensive review of numerous early self-pumping schemes is presented by both Wachtell [3] and Roberts [4].…”

Section: Introductionmentioning

confidence: 99%