Dish/Stirling hybrid-heat-pipe-receiver design and test results

Moreno, J.B.; Rawlinson, Scott; Andraka, Charles E.; Cordeiro, Patricia; Mehos, Mark; Bohn, M.; Corey, John

doi:10.1109/iecec.2002.1392105

Cited by 3 publications

(6 citation statements)

References 4 publications

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“…The input heat rate to the evaporator, q in , was irrelevant to the estimation of thermal performance from Equations (1) and (2). Since there would have been considerable heat loss through the insulation due to a large temperature difference across the layer, the heat discharge rate through the condenser surface, q cond served as an effective heat transport, and its value should be reflected in the equations.…”

Section: Performance Characteristics With Natural Convection Cooling mentioning

confidence: 99%

“…However, it was uncertain how much heat discharge rate actually occurred through the condenser and the other parts of the heat pipe. To estimate the effective thermal conductance and the thermal resistance in this case, therefore, the input heat rate q in was used for each q in Equations (1) and (2).…”

Section: Performance Characteristics With An Insulated Condenser Surfacementioning

confidence: 99%

“…In some CSP applications, the thermal energy collected by the solar receiver must be transferred to a direct thermal-to-electricity energy conversion device such as a Stirling engine or alkali-metal thermal to electric converter (AMTEC), which may have to be located a certain distance apart from the receiver, depending on the design of the specific system [1,2]. Such thermal transport systems typically require a small temperature drop, a high heat flux, operational reliability, and the least possible amount of power consumption.…”

Section: Introductionmentioning

confidence: 99%

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An Experimental Study on a Sodium Loop-type Heat Pipe for Thermal Transport from a High-temperature Solar Receiver

2015

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A loop-type heat pipe was fabricated and tested to transport high-temperature thermal energy from a solar receiver in a CSP application. The purpose of the heat pipe in this study was to transport an 800-W thermal load at 1000 K to a specific energy conversion device 0.5 m in distance from the solar receiver. The container wall and transport lines of the loop-type heat pipe were made of stainless steel 304, and the working fluid was sodium. The evaporator and condenser were disk-type containers with diameters of 122 and 216 mm, respectively, though both had a height of 20 mm. The diameters of the vapor and liquid lines were 12.7 and 9.53 mm, respectively. The total length of the loop was approximately 1.4 m. A pillar structure with a diameter of 43 mm and height of 114 mm was installed in the center region of the condenser to interface with an AMTEC device that had a unique geometry. It was desired that the upper surface of the condenser as well as the whole outer surface of the pillar would have temperatures as close as possible during heat discharge. As one of the unique features in this study, the liquid line was located close to the vapor line for a preheating effect to reduce the frozen-startup time. The influence of the fill charge ratio of the working fluid as well as operating conditions such as the thermal load and the cooling condition in the condenser were analyzed with respect to the performance indices of the heat pipe, including the effective thermal conductance, the thermal resistance, and the maximum temperature difference. The optimum fill charge ratio of the heat pipe was 32% based on the evaporator volume.

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Section: Performance Characteristics With Natural Convection Cooling mentioning

confidence: 99%

Section: Performance Characteristics With An Insulated Condenser Surfacementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An Experimental Study on a Sodium Loop-type Heat Pipe for Thermal Transport from a High-temperature Solar Receiver

2015

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“…Duarte Laing developed a hybrid sodium heat pipe receiver [4][5][6] . It is necessary to build an energy storage device that is large enough to cope with a long period of unlit or insufficient sunshine weather when the energy storage subsystem is configured in the solar power generation system.…”

Section: Introductionmentioning

confidence: 99%

Calculation and Performance Analysis of a Solar/Gas Receiver for a Stirling Power Generation System in Gas-Only Mode

Zhou¹,

Yin²,

Yang³

2018

dtetr

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Abstract. A thermal model for solar/gas Stirling power generation system was developed to achieve characteristics of the system in thermal balance. The thermal model was developed by building math models for a heat receiver, an air/gas heat exchanger, a Stirling engine and so on and coupling them. The effects of biogas flow rate, air flow rate, and CH4 concentration of biogas on the heat transfer characteristics of the solar/gas heat receiver (SGHR) was analyzed selectively in this paper. The calculation result shows that, with biogas mass flow rate increasing by 25%, the heat transfer power of the SGHR increases by 19.97% and the heat transfer efficiency of the SGHR decreases by 4.44%. With air mass flow rate increasing by 30%, the heat transfer power and efficiency of the SGHR both decreases by 13.84%. With CH4 concentration of biogas increasing by 18.18%, the heat transfer power of the SGHR increases by 27.14% and the heat transfer efficiency of the SGHR decreases by 2.96%.

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“…However, Stirling system, with a high cycle efficiency equivalent to efficiency of Carnot cycle [4], is not studied on hybrid systems. Although some Stirling engines have been designed to apply to either solar energy or fossil fuels [5,6], study on level of electrical power generating system is still insufficient.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of a Novel Hybrid Solar/Gas Dish Stirling System (HS/GDSS)

Zhan

Quan

et al. 2013

AMM

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In this paper, a 20kW design capacity solar parabolic dish concentrator hybrid solar/gas dish Stirling system (HS/GDSS) is proposed. To ensure a steady operation of an electricity power plant, HS/GDSS uses gas as complement when solar radiation is weak. Thermodynamic models were made to conduct design of system parameters. After detail characteristics were chosen, analysis was carried out to evaluate this system. The results show that within design condition, overall efficiency of the system is 27.58% at daytime and 33.94% at night, which has advantages over single-energy solar dish Stirling electricity power plant.

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Dish/Stirling hybrid-heat-pipe-receiver design and test results

Cited by 3 publications

References 4 publications

An Experimental Study on a Sodium Loop-type Heat Pipe for Thermal Transport from a High-temperature Solar Receiver

An Experimental Study on a Sodium Loop-type Heat Pipe for Thermal Transport from a High-temperature Solar Receiver

Calculation and Performance Analysis of a Solar/Gas Receiver for a Stirling Power Generation System in Gas-Only Mode

Design and Analysis of a Novel Hybrid Solar/Gas Dish Stirling System (HS/GDSS)

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