scholarly journals Validated mathematical models of a solar water heater system with thermosyphon evacuated tube collectors

2018 ◽  
Vol 12 ◽  
pp. 528-536 ◽  
Author(s):  
C. Wannagosit ◽  
P. Sakulchangsatjatai ◽  
N. Kammuang-lue ◽  
P. Terdtoon
Keyword(s):  
Mathematical Models ◽  
Solar Water Heater ◽  
Water Heater ◽  
Solar Water ◽  
Evacuated Tube Collectors ◽  
Evacuated Tube

Measurement and simulation of flow rate in a water-in-glass evacuated tube solar water heater

Solar Energy ◽  
2005 ◽  
Vol 78 (2) ◽  
pp. 257-267 ◽  
Author(s):  
G.L. Morrison ◽  
I. Budihardjo ◽  
M. Behnia
Keyword(s):  
Flow Rate ◽  
Solar Water Heater ◽  
Water Heater ◽  
Solar Water ◽  
Evacuated Tube

scholarly journals Theoretical and experimental investigation of the evacuated tube solar water heater system

2020 ◽  
Vol 24 (2 Part A) ◽  
pp. 795-808 ◽  
Author(s):  
Phrut Sakulchangsatjatai ◽  
Chaiwat Wannagosit ◽  
Niti Kammuang-Lue ◽  
Pradit Terdtoon
Keyword(s):  
Thermal Efficiency ◽  
Experimental Results ◽  
Experimental Result ◽  
Maximum Temperature ◽  
Solar Water Heater ◽  
Water Heater ◽  
Solar Water ◽  
Evacuated Tubes ◽  
Evacuated Tube ◽  
Theoretical Results

In this study, the evacuated tube solar water heater system using thermosyphon has been investigated experimentally as well as theoretically. Solar radiation and ambient temperature data from Chiang Mai province were used for the modelling system by explicit finite difference method. The effects of thermosyphon diameters and number of evacuated tubes on the net saving of solar water heater system were analyzed. The mathematical results showed that the optimal number of evacuated tubes and thermosyphon diameter occurs at eight evacuated tubes, which are 15.88 mm of evaporator diameter and 22.22 mm of condenser diameter under personal hygiene conditions. The solar water heater system at optimal parameters was constructed and tested for the system prototype. The theoretical results were validated by the experimental results. It was found that the theoretical results can be used to predict temperature, heat transfer rate, and thermal efficiency to show good agreement with the experimental results as well as previous research. The experimental and theoretical results showed that the maximum temperature for hot water was 65.25?C and 71.66?C, respectively. Moreover, the thermal efficiency of the system based on the theoretical result was 60.11%, with relative error being about 3.04% of the experimental result.

scholarly journals Performance of Water in Glass Evacuated Tube Solar Water Heater under Kenya Climatic Condition

2021 ◽  
Vol 10 (02) ◽  
pp. 37-48
Author(s):  
Ernest Kyekyere ◽  
Hiram Ndiritu ◽  
Meshack Hawi ◽  
Polline Mwambe
Keyword(s):  
Climatic Condition ◽  
Solar Water Heater ◽  
Water Heater ◽  
Solar Water ◽  
Evacuated Tube

scholarly journals PERBANDINGAN PERFORMANSI KOLEKTOR SURYA TIPE EVACUATED TUBE MENGGUNAKAN FLUIDA KERJA ETANOL DENGAN TIPE PELAT DATAR

2020 ◽  
Vol 4 (1) ◽  
pp. 275-279
Author(s):  
Rusmana ◽  
Kurnia Chandra
Keyword(s):  
Flat Plate ◽  
Solar Water Heater ◽  
Water Heater ◽  
Solar Water ◽  
Evacuated Tube Collector ◽  
Flat Plate Collector ◽  
Evacuated Tube

Mengingat wilayah Indonesia yang letaknya berada di garis khatulistiwa, sumber energi surya yang diterima Indonesia sangat melimpah. Pemanfaatan yang paling sederhana adalah menjadikan energi surya sebagai sumber panas pada proses pemanasan air. Teknologi kolektor surya merupakan salah satu sarana untuk mengambil panas matahari. Aneka jenis kolektor surya memiliki kinerja yang bervariasi. Kemampuan penyerapan panas yang tinggi dapat diperoleh dari kolektor surya berjenis evacuated tube collector yang mempunyai waktu pemanasan air awal lebih cepat dibandingkan dengan jenis flat plate collector. Penelitian ini bertujuan untuk mengetahui perbandingan efisiensi kolektor surya tabung vakum terhadap solar water heater sederhana. Metode pengujian dilakukan dengan cara memasukan debit air yang sama pada setiap pengujian. Hasil pengujian menunjukkan bahwa solar water heater tabung vakum dengan fluida kerja etanol memberikan efisiensi tertinggi sebesar 44.5% dan efisiensi terendah sebesar 26.4%. Temperatur air output tertinggi mencapai 35,4°C.

scholarly journals Comparative Analysis of Exergy and Efficiency for Stratified Thermal Storage Tank with Solar Flat Plate and Evacuated Tube Collectors

2016 ◽  
Vol 855 ◽  
pp. 114-118 ◽  
Author(s):  
Sukruedee Sukchai ◽  
Yodthong Mensin ◽  
Wikarn Wansungnern
Keyword(s):  
Flat Plate ◽  
Solar Collector ◽  
Storage Tank ◽  
Water Heating ◽  
Water Heater ◽  
Solar Water ◽  
Water Heaters ◽  
Evacuated Tube Solar Collector ◽  
Evacuated Tube Collectors ◽  
Evacuated Tube

In recent years, solar water heating technology has got the major importance in water heating applications. For the efficient and effective working of solar water heaters, storage of the hot water is the main issue in this water heating technologies. This paper mainly presents the exergy and efficiency comparison between the solar flat plate water heater and evacuated tube water heater. A five level stratified thermal storage tank is designed and developed for this analysis. At each level of the tank, temperature of the water is collected for each one hour interval from 9:00 to 16:00 hours in both cases and the overall exergy and efficiency of the two water heaters were calculated. The average efficiency of all the levels for flat plate and evacuated tube collectors are 7.91% and 8.20% respectively. The overall system efficiency is obtained as 39.54% for flat plate and 41.00% for evacuated tube solar collector. At each level exergy is calculate for both systems and the average exergy of all the levels for flat plate collector is 4.243 kW and for evacuated tube solar collector is 4.371 kW.

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