Correlation Between Collector Performance and Tube Spacing for Various Absorber Plate Materials in a Natural-circulation Solar Water Heater

The work reported here is the performance profile of a thermosyphon solar water heater developed by the National Centre for Energy Research and Development (NCERD), University of Nigeria, Nsukka. The performance evaluation was based on the mathematical models that describe the test system and some measured experimental data. The effect of some of the design and operating parameters that have been shown to affect the system’s performance was investigated. The parameters considered included the number of glazing covers, glazing cover thickness, tube spacing and the nature of absorber plate material. The performance results indicate that the test system has a maximum average daily collector efficiency of 0.658 and a mean system temperature of 81oC. The efficiency of the collector drops to an average seasonal value of 0.54 with a negligible variation across the three climatic seasons was covered in the study. With a tube spacing not exceeding 10 cm, the performance of the system is optimized irrespective of the nature of the absorber plate material. We found that the number of glazing covers affects the top-loss coefficient of the system depending on the type of absorber plate used. Multiple glazing shows a negligible contribution especially for low temperature application. The glazing cover thickness does not affect the performance of the system significantly.

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S056011 Study on a Natural Circulation Solar Water Heater Using Supercritical CO_2 as Working Fluid

The Proceedings of Mechanical Engineering Congress Japan ◽

10.1299/jsmemecj.2011._s056011-1 ◽

2011 ◽

Vol 2011 (0) ◽

pp. _S056011-1-_S056011-5

Author(s):

Shota KAKIUCHI ◽

Hiroshi YAMAGUCHI ◽

Xin-Rong Zhang ◽

Niu Xiaodong

Keyword(s):

Natural Circulation ◽

Working Fluid ◽

Solar Water Heater ◽

Water Heater ◽

Solar Water

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S0520102 Basic phenomenon of Natural Circulation Solar Water Heater using Supercritical CO_2 as a Working Fluid

The Proceedings of Mechanical Engineering Congress Japan ◽

10.1299/jsmemecj.2015._s0520102- ◽

2015 ◽

Vol 2015 (0) ◽

pp. _S0520102--_S0520102-

Author(s):

Akihito IKEUCHI ◽

Chayadit PUMANERATKUL ◽

Haruhiko YAMASAKI ◽

Yuhiro IWAMOTO ◽

Hiroshi YAMAGUCHI

Keyword(s):

Natural Circulation ◽

Working Fluid ◽

Solar Water Heater ◽

Water Heater ◽

Solar Water

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Performance Analysis Of Solar Water Heating System With Plate Collector Integrated Pcm Storage

EPI International Journal of Engineering ◽

10.25042/epi-ije.082020.09 ◽

2021 ◽

Vol 3 (2) ◽

pp. 143-149

Author(s):

Andi Syahrinaldy Syahruddin ◽

Jalaluddin Jalaluddin ◽

Azwar Hayat

Keyword(s):

Solar Energy ◽

Fluid Dynamic ◽

Heating System ◽

Solar Water Heater ◽

Absorber Plate ◽

Water Heater ◽

Solar Water ◽

Fluent Software ◽

Collector Efficiency ◽

Solar Water Heating System

Availability of solar energy as a renewable energy source is very abundant and inexhaustible. Solar water heater is an equipment that utilizes solar energy as a source of energy. The thermal performance of a solar water heater system using absorber plate with phase change material (PCM) as thermal energy storage is presented in this study. Two design of solar water heater collectors with absorber plate variations, i.e. an absorber plate with PCM storage and absorber plate without PCM storage were investigated experimentally and numerically simulation. First, the material properties of paraffin wax as PCM storage was analized analyticaly. Every shape model of solar water heater systems were imported and simulated at three variations of constant solar radiation, i.e. 400 W/m2, 700 W/m2, and 1000 W/m2. The simulation using a computational fluid dynamic (CFD) fluent software. The results showed that the average collector efficiency between absorber plate with and without PCM storage is 70.98 % using experimental study and 67.73 % using numerical simulation study.

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