Thermoeconomic analysis of solar water heaters integrating phase change material modules and mounted in football pitches in Tunisia

2021 ◽  
Vol 33 ◽  
pp. 102129
Author(s):  
Ridha Chargui ◽  
Bourhan Tashtoush
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Solar Water ◽  
Water Heaters ◽  
Solar Water Heaters ◽  
Change Material

scholarly journals Pengaruh Penambahan Phase Change Material (PCM) Pada Pemanas Air Kolektor Tabung Dilengkapi Dengan Reflektor Double - U

2019 ◽  
Vol 12 (2) ◽  
pp. 58
Author(s):  
Veni Dwi Sulastri ◽  
Hary Sutjahjono ◽  
Ahmad Syuhri
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Mass Flow ◽  
Radiation Energy ◽  
Heat Energy ◽  
Water Heater ◽  
Solar Water ◽  
Water Heaters ◽  
Flat Plate Collector ◽  
Change Material

Pemanas air energi surya merupakan suatu sistem pemanas air dengan cara kerja menyerap energi radiasi matahari yang kemudian diubah menjadi energi panas dan ditransfer menuju fluida kerja melalui pipa air. Pemanas air ini dibagi menjadi dua yaitu pemanas air kolektor tabung dan pemanas air kolektor plat datar. Dilakukan penelitian dengan menambahkan bahan Phase Change Material (PCM) yaitu sebuah material yang dapat menyimpan energi panas pada pemanas air kolektor tabung dilengkapi dengan reflektor double-U. Variabel pada penelitian ini yaitu pemanas air kolektor tabung tanpa menggunakan PCM dan menggunakan PCM, serta variasi laju aliran massa 0,008 kg/s, 0,010 kg/s, dan 0,030 kg/s. Bahan PCM yang digunakan yaitu campuran parafin 70% dan minyak goreng 30%. Tujuan dari penelitian ini yaitu untuk mengetahui pengaruh penambahan PCM terhadap temperatur air dan efisiensi dari pemanas air kolektor tabung. Hasil dari penelitian menunjukkan bahwa efisiensi tertinggi terjadi pada pemanas air kolektor tabung menggunakan PCM dengan laju aliran massa 0,030 kg/s yaitu sebesar 53,11%.   Solar water heater is a system that can absorb solar radiation energy and converted it into heat energy and transferred to the fluid of water pipe. Solar water heaters are divided into two types, that are tube collector water heater and flat plate collector water heater. The study was conducted by adding Phase Change Material (PCM), a material that can store heat energy in the tube collector water heater equipped with a double-U reflector. The variables in this study were tube collector water heaters without using PCM and tube collector water heaters using PCM, as well as variations in mass flow rates of 0.008 kg / s, 0.010 kg / s, and 0.030 kg / s. The PCM material used is 70% of paraffin and 30% of cooking oil. The purpose of this study is to determine the effect of adding PCM to water temperature and efficiency of tube collector water heaters. The results of the study showed that the highest efficiency occurred in tube collector water heaters using PCM with a mass flow rate of 0.030 kg / s which was equal to 53.11%.

scholarly journals Design, Developing and Construction of an Educational Solar Water Heating System with Phase Change

2015 ◽  
Vol 10 (1) ◽  
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Solar Collector ◽  
Heat Storage ◽  
Heating System ◽  
Storage Unit ◽  
Solar Water Heating ◽  
Solar Water ◽  
Solar Water Heating System ◽  
Change Material

An educational solar water heater with phase change material (PCM) was designed, developed, and constructed for instructional and demonstrative purposes. This interactive solar water heating system experimental apparatus is capable of demonstrating thermal energy storage and heat transfer concepts and principles. The system consists of two simultaneously functioning heat absorbing units. The first is a flat plate solar collector and the other is a heat storage unit consisting of phase change material (paraffin wax). The heat storage unit utilizes small aluminium cylinders (heat exchangers) filled with paraffin wax as the heat storage medium. Water pump is used to circulate the water between the solar collector and the storage unit where the PCM is located. Results indicate that the PCM stored energy, as latent heat, that was absorbed by the solar collector and released to heat the water in the storage tank when half of the hot water was replaced with cold water. Moreover, tests indicated that latent heat storage is more effective than sensible.

Evacuated Tube Solar Collectors Integrated With Phase Change Materials and Silicone Oil

2017 ◽  
Author(s):  
Alexios Papadimitratos ◽  
Sarvenaz Sobhansarbandi ◽  
Vladimir Pozdin ◽  
Anvar Zakhidov ◽  
Fatemeh Hassanipour
Keyword(s):  
Phase Change ◽  
Solar Collector ◽  
Phase Change Materials ◽  
Silicone Oil ◽  
Solar Water Heater ◽  
Water Heater ◽  
Solar Water ◽  
Water Heaters ◽  
Evacuated Tubes ◽  
Solar Water Heaters

This paper presents a novel method of integrating Phase Change Materials (PCMs) and Silicone oil within the Evacuated solar Tube Collectors (ETCs) for application in Solar Water Heaters (SWHs). In this method, heat pipe is immersed inside the phase change material, where heat is effectively accumulated and stored for an extended period of time due to thermal insulation of evacuated tubes. The proposed solar collector utilizes two distinct phase change materials (dual-PCM), namely Tritriacontane paraffin and Erythritol, with melting temperature 72°C and 118°C respectively. The integration of Silicone oil for uniform melting of the PCMs, utilizes the convective heat transfer inside the evacuated tubes, as this liquid polymerized material is well known for its temperature-stability and an excellent heat transfer medium. The operation of solar water heater with the proposed solar collector is investigated during both normal and stagnation (on-demand) operation. The feasibility of this technology is tested via small scale and large scale commercial solar water heaters. Beyond the improved functionality for solar water heater systems, the results from this study show show efficiency improvement of 26% for the normal operation and 66% for the stagnation mode compared with standard solar water heaters that lack phase change materials and silicone oil. The benefit of this method includes improved functionality by delayed release of heat, thus providing hot water during the hours of high demand or when solar intensity is insufficient such in a cloudy day and during night time.

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