scholarly journals Optimization and Forecasting the Efficiency of Solar Water Heater by Mathematical Regression

2019 ◽  
Vol 8 (4) ◽  
pp. 8912-8915
Keyword(s):  
Statistical Analysis ◽  
Process Parameters ◽  
Solar Collector ◽  
Solar Water Heater ◽  
Water Heater ◽  
Solar Water ◽  
Helical Twist

The performance of the solar collector was experimentally studied under the different twist conditions namely helical twist, helical with left right twist and screw twist, L/D ratio (i.e., 0, 3 and 6) and time. Based on the standard relationship, efficiency of the collector was calculated for the different experimental combinations. Further, the significance of solar collector process parameters was identified by statistical analysis. Also the optimal solar collector process parameters to achieve the maximum the efficiency was identified and a mathematical regression was generated to forecast the efficiency of the solar collector

Application of Supercritical Carbon Dioxide for Solar Water Heater

2017 ◽  
pp. 215-234
Author(s):  
Yuhiro Iwamoto ◽  
Hiroshi Yamaguchi
Keyword(s):  
Heat Exchanger ◽  
Solar Collector ◽  
Supercritical Co2 ◽  
Large Change ◽  
Solar Water Heater ◽  
Water Heater ◽  
Solar Water ◽  
Small Change ◽  
And Performance ◽  
Main Components

For supercritical CO2, a small change in temperature or pressure can result in large change in density, especially in the state close to the critical point. The large change in density can easily induce the natural convective flow. In this chapter, a solar water heater using supercritical CO2 which is originally designed and constructed will be introduced. The solar water heater is a closed loop system with main components of an evacuated solar collector and a heat exchanger. The working fluid of CO2 is naturally driven by the large change in density with absorbing and transporting heat in the solar collector. And the heat energy (hot water) is produced by exchanging the transferred heat with water in the heat exchanger. This chapter will describe the typical system operation and performance at different season and climates.

scholarly journals Pengaruh Kolektor Pelat Gelombang Dengan Dua Kaca Penutup Terhadap Penambahan Panas Untuk Meningkatkan Kinerja Solar Water Heater

2019 ◽  
Vol 3 (2) ◽  
Author(s):  
Dian Kusuma ◽  
Mustafa . ◽  
Sudarno .
Keyword(s):  
Solar Radiation ◽  
Solar Collector ◽  
Thermal Processes ◽  
Solar Water Heater ◽  
Water Heater ◽  
Cover Glass ◽  
Solar Water ◽  
Solar Engineering ◽  
C 50 ◽  
Initial Heat

The worked principle of solar collector wave absorber plate was to transfer solar radiation to the worked fluid. The solar radiation that falls on the first glass was partially reflected, then on the second glass partially absorbed by the absorbent plate. The heat absorbed by the absorbent plate will be used to heat the worked fluid (water) between the absorbent plate and the storage plate. The purpose of this research was to design and make solar collector used wave plate with two cover glass. The addition of incomed water heat used temperatures of 30 ° C, 40 ° C, 50 ° C. The method used was used an expriment by analyzed the effect of initial heat addition on efficiency. From the results of test data obtained collector performance of solar water heater the greater the addition of heat used then the smaller the efficiency. Each of the average heat additions efficiency at 30 ° C was 19.66%, the temperature of 40 ° C was 17.75%, and the temperature of 50 ° C was 12.23%.Keywords : wave absorbent plate, added heat, solar water heaterAnonim, 2017: wibe site: unmermadiun.ac.id, tanggal 26 Agustus 2017.Anonim. Bab II Landasan Teori Prinsip Kerja Kolektor suryaPelatPenyerap. 809b5f3ff5dc603fbc474afe006faef2,Tanggal 16 Mei 2017.Anggraini, Ekadewi Handoyo, 2002: Jurnal Teknik Mesin Universitas PETRA, Surabaya.Arismunandar, W. 1995. Teknologi Rekayasa Surya. edisi pertama. PT Pradnya Paramita. Jakarta.Burhanuddin, A. 2006. Karakteristik kolektor surya pelat datar dengan variasi jarak kaca penutup dan sudut kemiringan kolektor. Skripsi. Fakultas Matematika dan Ilmu Pengetahuan Alam  Universitas Sebelas Maret, Surakarta.Beizer, 1981, Konsep Fisika Modern. Jilid 3. Terjemahan The Houw Liong Ph.D, Penerbit Erlangga, Jakarta.Culp, 1991, Prinsip-prinsip Konversi Energi, Penerbit Erlangga, Jakarta.Duffie, dan Beckman. , 1991: Solar Engineering of Thermal Processes, John Willey and Sons Inc, Wisconsin.Giancoli, 1998: Fisika edisi kelima (Terjemahan Yuhilza Hanum), Erlangga, Jakarta.Jasjfi, 1995: Perpindahan kalor, Erlangga, Jakarta.Lunde, 1980, jbptitbpp-gdl-rahadianef-30837—2008ta-2.pdf, Bab II, Teori dasar 8.Maftukhil Murot, dkk., 2016. Pengaruh Penambahan Tekanan Diatas Pelat Penyerap Terhadap Kinerja Solar Water Heater Sederhana, Widya Teknika, Vol. 24, N0. 2: 20-32.Mustofa, 2008, Studi Eksperimen Pengaruh pelat penyerap ganda model gelombang dengan penambahan reflektor terhadap kinerja Solar Water Heater sederhana, Dosen Teknik Mesin, Universitas Merdeka Madiun.Mustofa, Ismail N. R., 2013, International Jurnal of Research in Engineering and Technologi, volume.02, Issue.09, September 2013.Prijono, 1986, Prinsip-prinsip Perpindahan Panas, Penerbit Erlangga, Jakarta.Rahadian, 2008 : Jurnal Teknik Mesin Universitas Sumatra Utara.Sijabat, Andri M. 2014. Rancang Bangun dan Analisa Kolektor Surya Tipe Pelat Datar Bersirip Untuk Penghasil Panas Pada Pengering Hasil Pertanian dan Perkebunan. Skripsi. Fakultas Teknik Universitas Sumatra Utara, Medan.Subur Edi S., Irfan Santoso. 2014. Jurnal Teknologi: Perancangan Solar Water Heater Jenis Pelat Datar Temperatur Medium Untuk Aplikasi Penghangat Air Mandi. Volume 7 Nomor 2: 118-127.Tirtoatmodjo, R., Ekadewi, A. H, 1999: Jurnal Teknik Mesin Universitas Kristen Petra

scholarly journals A small parabolic trough collector as a solar water heater: an experimental study in Ouargla region, Algeria

2020 ◽  
Vol 5 (2) ◽  
Author(s):  
Djamel Benmenine ◽  
Mokhtar Ghodbane
Keyword(s):  
Thermal Performance ◽  
Solar Collector ◽  
Hot Water ◽  
Solar Water Heater ◽  
Parabolic Trough ◽  
Water Heater ◽  
Parabolic Trough Collector ◽  
Solar Water ◽  
Knowing That ◽  
Average Consumption

This study aims to conduct an experimental thermal examination of a parabolic trough collector in Ouargla region at Algeria, which will be used as a solar water heater. The solar collector was manufactured and then experimentally tested, as its theoretical optical performance was estimated at 75.06%, while the values of its true thermal performance are 10.61, 10.68 and 8.85 % for 13 May, 14 May and 15 May. Although its thermal performance is somewhat low, the studied PTC is effective in heating the water, whereas, using a volumetric flow of 0.011 l/s, about 317 liters of water can be heated daily at 42°C, knowing that the daily average consumption of hot water in a typical house is 250 liters because the Ouargla region is strategically located that receives huge amounts of solar irradiance

scholarly journals Development of Low-Cost Solar Water Heater Using Recycled Solid Waste for Domestic Hot Water Supply

2018 ◽  
Vol 150 ◽  
pp. 04010
Author(s):  
Abdul Talib Din ◽  
Khairul Azri Azlan
Keyword(s):  
Flat Plate ◽  
Solid Waste ◽  
Solar Collector ◽  
Low Cost ◽  
Maximum Efficiency ◽  
Solar Water Heater ◽  
Water Heater ◽  
Solar Water ◽  
Heat Absorber ◽  
Heat Collector

This research is focused on the development of a low-cost solar water heater (SWH) system by utilizing solid waste material as part of system elements. Available technologies of the solar water heater systems, heat collectors and its components were reviewed and the best system combinations for low cost design were chosen. The passive-thermosiphon system have been chosen due to its simplicity and independency on external power as well as conventional pump. For the heat collector, flat plate type was identified as the most suitable collector for low cost design and suits with Malaysia climate. Detail study on the flat plate collector components found that the heat absorber is the main component that can significantly reduce the solar collector price if it is replaced with recycled solid waste material. Review on common solid wastes concluded that crushed glass is a non-metal material that has potential to either enhance or become the main heat absorber in solar collector. A collector prototype were then designed and fabricated based on crashed glass heat collector media. Thermal performance test were conducted for three configurations where configuration A (black painted aluminum absorber) used as benchmark, configuration B (crushed glass added partially) that use glass for improvement, and lastly configuration C (black colored crushed glass) that use colored glass as main absorber. Result for configuration B have shown a negative effect where the maximum collector efficiency is 26.8% lower than configuration A. Nevertheless, configuration C which use black crushed glass as main heat absorber shown a comparable maximum efficiency which is at 82.5% of the maximum efficiency for configuration A and furthermore have shown quite impressive increment of efficiency at the end of the experiment. Hence, black colored crushed glass is said to have quite a good potential as the heat absorber material and therefore turn out to be a new contender to other non-metal heat absorber such as plastic and rubber.

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.

Application of Supercritical Carbon Dioxide for Solar Water Heater

2021 ◽  
pp. 370-387
Author(s):  
Yuhiro Iwamoto ◽  
Hiroshi Yamaguchi
Keyword(s):  
Heat Exchanger ◽  
Solar Collector ◽  
Supercritical Co2 ◽  
Large Change ◽  
Solar Water Heater ◽  
Water Heater ◽  
Solar Water ◽  
Small Change ◽  
And Performance ◽  
Main Components

For supercritical CO2, a small change in temperature or pressure can result in large change in density, especially in the state close to the critical point. The large change in density can easily induce the natural convective flow. In this chapter, a solar water heater using supercritical CO2 which is originally designed and constructed will be introduced. The solar water heater is a closed loop system with main components of an evacuated solar collector and a heat exchanger. The working fluid of CO2 is naturally driven by the large change in density with absorbing and transporting heat in the solar collector. And the heat energy (hot water) is produced by exchanging the transferred heat with water in the heat exchanger. This chapter will describe the typical system operation and performance at different season and climates.

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