Experimental study and analysis of single slope solar still integrated with Phase Change Material

This study is intended to investigate and analyze the operational performances of the Conventional Tubular Solar Still (CTSS), Tubular Solar Still with Phase Change Material (TSS-PCM) and Tubular Solar Still with Nano Phase Change Material (TSS-NPCM). Paraffin wax and graphene plusparaffin wax were used in the CTSS to obtain the modified solar still models. The experimental study was carried out in the three stills to observe the operational parameters at a water depth of 1 cm. The experiment revealed that TSS-NPCM showed the best performance and the highest yield in comparison to other stills. The distillate yield from the CTSS, TSS-PCM and TSS-NPCM was noted to be 4.3, 6.0 and 7.9 kg, respectively, the daily energy efficiency of the stills was observed to be 31%, 46% and 59%, respectively, and the daily exergy efficiency of the stills was recorded to be 1.67%, 2.20% and 3.75%, respectively. As the performance of the TSS-NPCM was enhanced, the cost of freshwater yield obtained was also low in contrast to the other two types of stills.

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Using PCM, an Experimental Study on Solar Stills Coupled with and without a Parabolic Trough Solar Collector

Basrah journal of engineering science ◽

10.33971/bjes.21.2.7 ◽

2021 ◽

Vol 21 (2) ◽

pp. 45-52

Author(s):

Hazim Jassim Jaber ◽

Qais A. Rishak ◽

Qahtan A. Abed

Keyword(s):

Experimental Study ◽

Phase Change ◽

Phase Change Material ◽

Solar Collector ◽

Heat Energy ◽

Solar Still ◽

Parabolic Trough ◽

Parabolic Trough Collector ◽

Parabolic Trough Solar Collector ◽

Change Material

Performance a double slope of the solar still Integrated With or without parabolic trough collector is investigated experimentally. To improve the output of a double slope solar still, a number of initiatives have been undertaken, using wax as a phase change material (PCM) with a parabolic trough collector. A parabolic trough collector (PTC) transfers incident solar energy to the solar still through a water tube connected to a heat exchanger embedded in used microcrystalline wax. Experiments were carried out after orienting the basin to the south and holding the water depth in the basin at 20 mm. According to the results obtained, the solar stills with parabolic trough collector have higher temperatures and productivity than solar stills without parabolic trough collector, as well as the ability to store latent heat energy in solar still, allowing fresh water to condense even after sunset. In addition, the parabolic trough collector with phase change material in the double slope solar improves productivity by 37.3 % and 42 %, respectively.

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Experimental Study on Thermal Characteristics of Finned Coil LHSU Using Paraffin as Phase Change Material

Journal of Heat Transfer ◽

10.1115/1.4035321 ◽

2017 ◽

Vol 139 (4) ◽

Cited By ~ 1

Author(s):

Guansheng Chen ◽

Nanshuo Li ◽

Huanhuan Xiang ◽

Fan Li

Keyword(s):

Heat Transfer ◽

Experimental Study ◽

Phase Change ◽

Phase Change Material ◽

Water Flow ◽

Water Flow Rate ◽

Thermal Characteristics ◽

Heat Transfer Fluid ◽

Latent Heat Storage ◽

Change Material

It is well known that attaching fins on the tubes surfaces can enhance the heat transfer into and out from the phase change materials (PCMs). This paper presents the results of an experimental study on the thermal characteristics of finned coil latent heat storage unit (LHSU) using paraffin as the phase change material (PCM). The paraffin LHSU is a rectangular cube consists of continuous horizontal multibended tubes attached vertical fins at the pitches of 2.5, 5.0, and 7.5 mm that creates the heat transfer surface. The shell side along with the space around the tubes and fins is filled with the material RT54 allocated to store energy of water, which flows inside the tubes as heat transfer fluid (HTF). The measurement is carried out under four different water flow rates: 1.01, 1.30, 1.50, and 1.70 L/min in the charging and discharging process, respectively. The temperature of paraffin and water, charging and discharging wattage, and heat transfer coefficient are plotted in relation to the working time and water flow rate.

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