Performance of a thermosyphon with a 37-meter-long, horizontal evaporator

Haynes, F. D.; Zarling, John P.; Gooch, Gordon

doi:10.1016/0165-232x(92)90033-q

Cited by 17 publications

(9 citation statements)

References 5 publications

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“…This special CO 2 condenser design consisted of a shell and coil set-up with two parallel heat exchangers inside a pressure vessel [28], ensuring a smooth film at the inner tube wall condenser. A transverse cross sectional view in the condenser of the passive-active thermosiphon patented by Haynes et al [33] is presented in Figure 8. In light of these developments, the GCT-HP appears to offer a very interesting application potential not only for single-family houses, but also for high capacity urban heating systems.…”

Section: Gct-assisted Heat Pump (Gct-hp)mentioning

confidence: 99%

Section: Smart or Reversible Gctmentioning

confidence: 99%

“…Performance has also been experimentally evaluated in terms of the system working period and heating and cooling capability. The main aspects of cooling performance include the rate of ice growth on the evaporator section [154], the thermal stability of the construction foundation, [54,72,89,96,152], the embankment deformations, the thaw settlement, the temperature distribution of the ground beneath the construction, and the effectiveness of thermosiphons [155]. Overall, laboratory and field observations demonstrated the satisfactory performance of thermosiphon techniques applied to applications such as maintaining permafrost in the subgrade layers of highways and railways.…”

Section: Performance Evaluationmentioning

confidence: 99%

“…As mentioned above, laboratory tests on small scale thermosiphons performed by Lee and Bedrossian [175] and Negishi and Sawada [176], showed a significant decrease in the heat transfer conductance with a horizontal evaporator. Laboratory tests were also conducted on a full-size thermosiphon with a horizontal evaporator that was 37-mlong and 7.6 cm in diameter [154]. The performance was evaluated by measuring the rate of ice growth on the evaporator, which provides an indication of the heat transfer conductance of the thermosiphon.…”

Section: Condenser and Evaporator Designmentioning

confidence: 99%

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Ground-Coupled Natural Circulating Devices (Thermosiphons): A Review of Modeling, Experimental and Development Studies

et al. 2019

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Compared to conventional ground heat exchangers that require a separate pump or othermechanical devices to circulate the heat transfer fluid, ground coupled thermosiphons or naturallycirculating ground heat exchangers do not require additional equipment for fluid circulation in theloop. This might lead to a better overall efficiency and much simpler operation. This paper providesa review of the current published literature on the different types of existing ground coupledthermosiphons for use in applications requiring moderate and low temperatures. Effort has beenfocused on their classification according to type, configurations, major designs, and chronologicalyear of apparition. Important technological findings and characteristics are provided in summarytables. Advances are identified in terms of the latest device developments and innovative conceptsof thermosiphon technology used for the heat transfer to and from the soil. Applications arepresented in a novel, well-defined classification in which major ground coupled thermosiphonapplications are categorized in terms of medium and low temperature technologies. Finally,performance evaluation is meticulously discussed in terms of modeling, simulations, parametric,and experimental studies.

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Section: Gct-assisted Heat Pump (Gct-hp)mentioning

confidence: 99%

Section: Smart or Reversible Gctmentioning

confidence: 99%

Section: Performance Evaluationmentioning

confidence: 99%

Section: Condenser and Evaporator Designmentioning

confidence: 99%

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Ground-Coupled Natural Circulating Devices (Thermosiphons): A Review of Modeling, Experimental and Development Studies

et al. 2019

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“…The experimental thermosyphons used in previous studies were from vertical to inclined, from circular, annular to rectangular cross-section, from extra long (Haynes et al 1992) to a very small size. The heating and cooling methods were from constant-heat flux, constant-temperature, forced-convective heating/cooling.…”

Section: Thermodynamic Analysis Of Thermosyphonsmentioning

confidence: 99%

Engineering Design Elements of a Two-Phase Thermosyphon to Trannsfer NGNP Nuclear Thermal Energy to a Hydrogen Plant

Sabharwal¹

2009

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Three hydrogen production processes, powered by a Next Generation Nuclear Plant (NGNP), are currently under investigation at Idaho National Laboratory. The first is high-temperature steam electrolysis, which uses both heat and electricity; the second is thermo-chemical production through the sulfur iodine process primarily using heat; the third is a hybrid sulfur process (not part of this study) which incorporates sulfur acid decomposition and sulfur dioxide depolarized electrolysis, all processes require a high temperature (>850°C) for enhanced efficiency; temperatures indicative of the NGNP. Safety and licensing mandates prudently dictate that the NGNP and the hydrogen production facility be physically isolated, perhaps requiring separation of over 100 m. This research presents useful insights into making decisions regarding the thermosyphon heat transfer system between the nuclear reactor and chemical plant. Developing very high-temperature reactor technologies for producing electricity, hydrogen, and other energy products is a high priority for a successful national energy future.

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Optimum design of thermosyphon evaporators for roadway embankment stabilization in the arctic regions

Kukkapalli

Kim

2021

J Mech Sci Technol

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Performance of a thermosyphon with a 37-meter-long, horizontal evaporator

Cited by 17 publications

References 5 publications

Ground-Coupled Natural Circulating Devices (Thermosiphons): A Review of Modeling, Experimental and Development Studies

Ground-Coupled Natural Circulating Devices (Thermosiphons): A Review of Modeling, Experimental and Development Studies

Engineering Design Elements of a Two-Phase Thermosyphon to Trannsfer NGNP Nuclear Thermal Energy to a Hydrogen Plant

Optimum design of thermosyphon evaporators for roadway embankment stabilization in the arctic regions

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