Experimental Investigation on Performance Comparison of Solar Water Heating-Phase Change Material System and Solar Water Heating System

Sun, Yeali S.; Xiang, Nan; Yuan, Yanping; Cao, Xiaoling

doi:10.3390/en12122347

Cited by 6 publications

(2 citation statements)

References 18 publications

(26 reference statements)

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“…Sun et al [50] investigated experimentally the efficiency of a solar installation for heating water, which included, inter alia, a flat solar collector. As the working liquid, an aqueous paraffin emulsion (paraffin mass 20%) with the addition of graphene was used to improve the thermal conductivity of the fluid.…”

Section: Letant Functional Thermal Fluid As a Working Fluid In Solar ...mentioning

confidence: 99%

Experimental Studies of the Influence of Microencapsulated Phase Change Material on Thermal Parameters of a Flat Liquid Solar Collector

2021

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The article presents the results of preliminary research aimed at determining the possibility of using microencapsulated phase change material (mPCM) slurries as a working fluid in installations with a flat liquid solar collector. In the tests, the following were used as the working fluid: water (reference liquid) and 10% wt. and 20% wt. of an aqueous solution of the product under the trade name MICRONAL® 5428 X. As the product contained 43% mPCM, the mass fraction of mPCM in the working liquid was 4.3% and 8.6%, respectively. The research was carried out in laboratory conditions in the range of irradiance I = 250–950 W/m2. Each of the three working fluids flowed through the collector in the amount of 20 kg/h, 40 kg/h, and 80 kg/h. The working fluid was supplied to the collector with a constant temperature Tin = 20 ± 0.5 °C. It was found that the temperature of the working fluid at the collector outlet increases with the increase in the radiation intensity, but the temperature achieved depended on the type of working fluid. The greater the share of mPCM in the working liquid, the lower the temperature of the liquid leaving the solar collector. It was found that the type of working fluid does not influence the achieved thermal power of the collector. The negative influence of mPCM on the operation of the solar collector was not noticed; the positive aspect of using mPCM in the solar installation should be emphasized—the reduced temperature of the medium allows the reduction in heat losses to the environment from the installation, especially in a low-temperature environment.

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Section: Letant Functional Thermal Fluid As a Working Fluid In Solar ...mentioning

confidence: 99%

Experimental Studies of the Influence of Microencapsulated Phase Change Material on Thermal Parameters of a Flat Liquid Solar Collector

2021

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“…Because of its proper absorption band and low cost, a silicon solar cell is an economic and efficient choice to link the visible output port. For the infrared port, the successive receiver for energy conversion can be either infrared solar cells or high-efficiency thermal modules, such as a solar water heater coupled with a phase-change material [28]. The system efficiencies of several feasible configurations were analyzed, and their details are reported in the following section.…”

Section: Demonstration and Experimentsmentioning

confidence: 99%

A Side-Absorption Concentrated Module with a Diffractive Optical Element as a Spectral-Beam-Splitter for a Hybrid-Collecting Solar System

2020

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In this paper, we propose a side-absorption concentrated module with diffractive grating as a spectral-beam-splitter to divide sunlight into visible and infrared parts. The separate solar energy can be applied to different energy conversion devices or diverse applications, such as hybrid PV/T solar systems and other hybrid-collecting solar systems. Via the optimization of the geometric parameters of the diffractive grating, such as the grating period and height, the visible and the infrared bands can dominate the first and the zeroth diffraction orders, respectively. The designed grating integrated with the lens and the light-guide forms the proposed module, which is able to export visible and infrared light individually. This module is demonstrated in the form of an array consisting of seven units, successfully out-coupling the spectral-split beams by separate planar ports. Considering the whole solar spectrum, the simulated and measured module efficiencies of this module were 45.2% and 34.8%, respectively. Analyses of the efficiency loss indicated that the improvement of the module efficiency lies in the high fill-factor lens array, the high-reflectance coating, and less scattering.

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Emerging PEG/VO2 dual phase change materials for thermal energy storage

Bai

Xie

et al. 2022

Solar Energy Materials and Solar Cells

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Experimental Investigation on Performance Comparison of Solar Water Heating-Phase Change Material System and Solar Water Heating System

Cited by 6 publications

References 18 publications

Experimental Studies of the Influence of Microencapsulated Phase Change Material on Thermal Parameters of a Flat Liquid Solar Collector

Experimental Studies of the Influence of Microencapsulated Phase Change Material on Thermal Parameters of a Flat Liquid Solar Collector

A Side-Absorption Concentrated Module with a Diffractive Optical Element as a Spectral-Beam-Splitter for a Hybrid-Collecting Solar System

Emerging PEG/VO2 dual phase change materials for thermal energy storage

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