An experimental investigation of a natural circulation heat pipe system applied to a parabolic trough solar collector steam generation system

Zhang, Liang; Wang, Wujun; Yu, Zi‐Tao; Fan, Li‐Wu; Hu, Ya-Cai; Ni, Yu; Fan, Jianren; Cen, Kefa

doi:10.1016/j.solener.2011.11.020

Cited by 56 publications

(14 citation statements)

References 39 publications

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“…They claimed that it reduces the vacuum loss and hence the reduction of loss from the receiver thereby increasing the efficiency of the PTC system. Zhang et al [18] experimentally investigated the effects of wind, vacuum glass tube, radiation, and structural characteristics of the heat losses. They concluded that the thermal efficiencies of the receiver were found to be 0.791 and 0.472 in calm and windy days, respectively, at a test temperature of about 100 °C.…”

Section: Introductionmentioning

confidence: 99%

Thermal performance analysis of helical coil solar cavity receiver based parabolic trough concentrator

Kumar

Shukla

2019

THERM SCI

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The present paper investigates the performance of helical coil solar cavity receiver based parabolic trough concentrator (PTC) for the conversion of energy received from the Sun into useful heat and finally electricity. The experimental setup has been designed in such a way that it enhances heat transfer coefficient and reduces losses in the PTC. The PTC comprised of a blackened helical coil made up of two concentric borosilicate glass cylinder with vacuum in the annulus, which is kept at a focal line of PTC. The vacuum significantly reduces the losses which are evident from a relatively higher temperature of a 565 K obtained at the surface of the helical coil. Heat loss from helical coil solar cavity receiver has also been investigated and it was found that with the increase in vacuum pressure at annulus by 50%, the losses from the receiver has been increased by 26.67%. The heat loss from receiver has been observed to be proportional to the vacuum pressure within the annulus space.

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Section: Introductionmentioning

confidence: 99%

Thermal performance analysis of helical coil solar cavity receiver based parabolic trough concentrator

Kumar

Shukla

2019

THERM SCI

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“…Lüpfert et al [7] have proposed methods for measuring receiver heat losses including field measurement and laboratory setups both based on energy balances from the hot inside of the receiver tube to the ambient air. Zhang et al [8,9] have presented an experimental study of the heat losses of a double glazing vacuum U-type solar receiver mounted in a parabolic trough collector natural circulation system for generating medium-temperature steam. Kalogirou [10] has a survey of the various types of solar thermal collector and application.…”

Section: Introductionmentioning

confidence: 99%

Sensitive Analysis for the Efficiency of a Parabolic Trough Solar Collector Based on Orthogonal Experiment

Liu

Huang

Mao

2015

International Journal of Photoenergy

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A multitude of the researches focus on the factors of the thermal efficiency of a parabolic trough solar collector, that is, the optical-thermal efficiency. However, it is limited to a single or double factors for available system. The aim of this paper is to investigate the multifactors effect on the system’s efficiency in cold climate region. Taking climatic performance into account, an average outlet temperature of LS-2 collector has been simulated successfully by coupling SolTrace software with CFD software. Effects of different factors on instantaneous efficiency have been determined by orthogonal experiment and single factor experiment. After that, the influence degree of different factors on the collector instantaneous efficiency is obtained clearly. The results show that the order of effect extent for average maximal deviation of each factor is inlet temperature, solar radiation intensity, diameter, flow rate, condensation area, pipe length, and ambient temperature. The encouraging results will provide a reference for the exploitation and utilization of parabolic trough solar collector in cold climate region.

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“…Investigation on performance and energy consumption efficiency of 15 kW solar receivers for hydrogen production has also been studied [13]. AU type heat circulation pipe system has also been designed and studied for generating medium temperature steam [14]. Also, various solar plants have been setup by the government to concentrate the solar energy while arranging large number of concentrating mirrors in different fashions to heat up the fluid at very high temperatures using solar thermal energy.…”

Section: Introductionmentioning

confidence: 99%

An Effective Parabolic Solar Collector for Evaluation and Testing Experimental Model

2015

IJEE

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The present work demonstrates fabrication and scope of the parabolic solar collector setup with significant temperature rise using concentric copper tubes filled with graphite powder. This paper basically focused on application of alternative energy which is convenient to utilize and maintain. The solar collector's efficiency studies aimed to improvement system performance with respect to energy conversion efficiency. The parabolic collector and the entire setup were fabricated on local workshop. The main objective of the research is to obtain very significant changes in the temperature rise of water from the output gate valve of the collector and to provide a cost efficient method to harvest the solar energy in the most effective way. It also includes comparison of the collector's performance by installing copper tubes and concentric copper tubes filled with graphite. Testing of the entire system was carried out during the month of April 2015 at Noida (28° 57' N and 77° 32'E). This setup found applications such as a solar geyser, thermal power units, steam generation systems etc.

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An experimental investigation of a natural circulation heat pipe system applied to a parabolic trough solar collector steam generation system

Cited by 56 publications

References 39 publications

Thermal performance analysis of helical coil solar cavity receiver based parabolic trough concentrator

Thermal performance analysis of helical coil solar cavity receiver based parabolic trough concentrator

Sensitive Analysis for the Efficiency of a Parabolic Trough Solar Collector Based on Orthogonal Experiment

An Effective Parabolic Solar Collector for Evaluation and Testing Experimental Model

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