PreprintArticleVersion 1Preserved in Portico This version is not peer-reviewed
Rectangular Spiral Inward-Outward Alternating- Flow Polymer Thermal Collector for Solar Water Heating System—A Preliminary Investigation under Seri Iskandar, Malaysia Climate
Version 1
: Received: 20 May 2024 / Approved: 21 May 2024 / Online: 21 May 2024 (12:43:16 CEST)
How to cite:
Mohamad, T. I.; Mohd Syaifudeen, M. D. S.; Nasir, A. B. Rectangular Spiral Inward-Outward Alternating- Flow Polymer Thermal Collector for Solar Water Heating System—A Preliminary Investigation under Seri Iskandar, Malaysia Climate. Preprints2024, 2024051370. https://doi.org/10.20944/preprints202405.1370.v1
Mohamad, T. I.; Mohd Syaifudeen, M. D. S.; Nasir, A. B. Rectangular Spiral Inward-Outward Alternating- Flow Polymer Thermal Collector for Solar Water Heating System—A Preliminary Investigation under Seri Iskandar, Malaysia Climate. Preprints 2024, 2024051370. https://doi.org/10.20944/preprints202405.1370.v1
Mohamad, T. I.; Mohd Syaifudeen, M. D. S.; Nasir, A. B. Rectangular Spiral Inward-Outward Alternating- Flow Polymer Thermal Collector for Solar Water Heating System—A Preliminary Investigation under Seri Iskandar, Malaysia Climate. Preprints2024, 2024051370. https://doi.org/10.20944/preprints202405.1370.v1
APA Style
Mohamad, T. I., Mohd Syaifudeen, M. D. S., & Nasir, A. B. (2024). Rectangular Spiral Inward-Outward Alternating- Flow Polymer Thermal Collector for Solar Water Heating System—A Preliminary Investigation under Seri Iskandar, Malaysia Climate. Preprints. https://doi.org/10.20944/preprints202405.1370.v1
Chicago/Turabian Style
Mohamad, T. I., Mohammad Danish Shareeman Mohd Syaifudeen and Abu Bakar Nasir. 2024 "Rectangular Spiral Inward-Outward Alternating- Flow Polymer Thermal Collector for Solar Water Heating System—A Preliminary Investigation under Seri Iskandar, Malaysia Climate" Preprints. https://doi.org/10.20944/preprints202405.1370.v1
Abstract
A flat-plate unglazed solar water heater (SWH) with polymer thermal absorber was developed and tested. Polymer thermal absorber as a viable alternative to metal thermal absorber that is found in most SWH systems. The performance of this polymer SWH system is measured based on inlet and outlet water temperature, water flowrate, ambient air temperature and solar irradiance. The polymer thermal absorbers are hollow Polyvinyl Chloride (PVC) pipes with 20mm external diameter and 3 mm thick, painted in black to enhance radiation absorption. The pipes are arranged in a rectangular spiral inward-outward opposing-flow (RSioof). The collector pipes are placed in a 1 m2 square enclosure with bottom insulation and reflective surface for better radiation capture. Water circulation is a closed loop with a 16-liter uninsulated storage tank, driven by a pump and controlled by valves to maintain a mass flow rate of 0.00031 to 0.00034 kg/s. The test was conducted under partially clouded sky from 9 am to 5 pm, with solar irradiance between 105 and 1003 W/m2 and 27-36oC ambient air temperature. The SHW produced outlet hot water at 65oC by mid-day and maintained the storage temperature at 63oC until the end of test duration. Photo-thermal energy conversion was recorded with 23% maximum value. Results indicate that a flat plate solar water heater with polymer thermal absorber in RSioof design can be an effective alternative to the metal thermal absorber solar water heater and can be further optimized with glazing and tube sizing.
Keywords
Solar water heater; polymer thermal absorber; photothermal conversion; residence time; active system
Subject
Engineering, Energy and Fuel Technology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
