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Experimental investigation of a domestic solar water heater with solar collector coupled phase-change energy storage

机译：带有集热器相变储能的家用太阳能热水器的实验研究

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Phase change materials (PCMs) have good properties such as high thermal capacity and constant phase change temperature. Their potential use in solar energy storage is promising. Tests of exposure and constant flow rate are performed to investigate the thermal performance of a domestic solar water heater with solar collector coupled phase-change energy storage (DSWHSCPHES). Due to the low thermal conductivity and high viscosity of PCM, heat transfer in the PCM module is repressed. The thermal performance of the DSWHSCPHES under exposure is inferior to that of traditional water-in-glass evacuated tube solar water heaters (TWGETSWH) with an identical collector area. DSWHSCPHES also performs more efficiently with a constant flow rate than under the condition of exposure. Radiation and initial water temperature have impacts on system performance; with the increase of proportion of diffuse to global radiation and/or initial water temperature, system performance deteriorates and vice versa. (C) 2015 Elsevier Ltd. All rights reserved.
机译：相变材料（PCM）具有良好的性能，例如高热容量和恒定的相变温度。它们在太阳能存储中的潜在用途是有前途的。进行暴露和恒定流量测试以研究带有太阳能收集器耦合相变储能（DSWHSCPHES）的家用太阳能热水器的热性能。由于PCM的低导热性和高粘度，抑制了PCM模块中的热传递。 DSWHSCPHES在暴露条件下的热性能不及具有相同集热面积的传统玻璃内真空管式太阳能热水器（TWGETSWH）。 DSWHSCPHES在恒定流速下也比在暴露条件下更有效地工作。辐射和初始水温会影响系统性能；随着扩散与总辐射的比例和/或初始水温的增加，系统性能下降，反之亦然。 （C）2015 Elsevier Ltd.保留所有权利。

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