Combined Convective-Radiative Thermal Analysis of a Solar Flat-Plate Collector

2015 ◽  
Author(s):  
Aaron P. Eicoff ◽  
Mohammad H. Naraghi
Keyword(s):  
Heat Transfer ◽  
Flat Plate ◽  
Heat Fluxes ◽  
Heat Transfer Analysis ◽  
Water Heater ◽  
Solar Water ◽  
Water Heaters ◽  
Flat Plate Solar Collector ◽  
Flat Plate Collector ◽  
Solar Water Heaters

A model for the combined spectral radiative, conductive and convective heat transfer analysis of solar water heaters is presented. The radiation aspect of this model is based on the spectral distribution of the solar irradiance and spectrally selective properties of the system components. The convective equations that were used are based on well-established empirical models. The heat transfer characteristics of the solar water heater are determined by simultaneously solving a nonlinear system of energy balance equations for the various physical components using an iterative approach. The model is used to predict temperatures and heat fluxes for a typical flat-plate solar collector for various geometries and conditions i.e. flow rates, solar irradiances and spectral properties.

scholarly journals Experimental Evaluation of a Flat Plate Solar Collector Under Hail City Climate

2018 ◽  
Vol 8 (2) ◽  
pp. 2750-2754
Author(s):  
N. Ben Khedher
Keyword(s):  
Flat Plate ◽  
Flow Rate ◽  
Solar Collector ◽  
Weather Conditions ◽  
Water Heater ◽  
Optimum Flow Rate ◽  
Water Heaters ◽  
Flat Plate Solar Collector ◽  
Flat Plate Collector ◽  
Solar Water Heaters

Flat plate solar water heaters are widely used for water heating in low-temperature residential applications. In this paper the thermal performance of a solar flat plate water heater under Hail weather conditions (latitude 27°52΄N longitude ‎41°69΄E) was experimentally investigated. Fluid was circulated through the imbedded copper tubes in the flat plate collector and inlet and outlet temperatures of the fluid were noted at five minute intervals. The experimental-time was between 9:00AM-15:00PM. A study was carried out experimentally to present the efficiency curves of a flat plate solar collector at different flow rates. ASHRAE standard 93-2003 was followed for calculation of instantaneous efficiency of solar collector. Result shows that the flow rate of the circulating fluid highly influence the thermal efficiency of the solar collector. Optimum flow rate of 2.5L/min leads to maximum collector efficiency.

scholarly journals Assessment of Uncertainties in Energetic and Exergetic Performances of a Flat Plate Solar Water Heater

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Intissar Harrabi ◽  
Mohamed Hamdi ◽  
Majdi Hazami
Keyword(s):  
Flat Plate ◽  
Multiwall Carbon Nanotubes ◽  
Operating Conditions ◽  
Working Fluid ◽  
Water Heater ◽  
Solar Water ◽  
Water Heaters ◽  
Proposed Model ◽  
Energy And Exergy ◽  
Solar Water Heaters

This paper aims to quantify sensitivities of energy and exergy performances of Flat Plate Solar Water Heaters (FPSWHs) with respect to measurement parameters. For that purpose, a computational tool is developed and validated by using outdoor conditions according to the test standard EN 12975. First of all, numerical simulations are compared with experimental results and available data in the literature, and the comparison shows a good agreement. Then, we apply the proposed model to the quantification of uncertainties associated with transient simulation. Results show that ambient temperature is the main relevant factor in operating conditions, and its effect reaches 13.7% and 3.89% on energy and exergy efficiencies, respectively, when the deviation in the sensor measurement is about ±1°C. When 0.15 v% multiwall carbon nanotubes (MWCNT)-Ethylene-Glycol (E-G) (30 : 70) nanofluid is used as working fluid, results show that a suitable choice of nanofluid properties achieves 84.7% of the thermal efficiency during the zero reduced temperature conditions compared to 75.4% when the collector works with E-G. Using common empirical correlations affects substantially the accuracy of the fitting parameters, and the deviation in exergy efficiency reaches 1.18%.

scholarly journals Assessment and Modeling of Household-Scale Solar Water Heater Application in Zambia: Technical, Environmental, and Energy Analysis

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Mehdi Jahangiri ◽  
Esther T. Akinlabi ◽  
Sam M. Sichilalu
Keyword(s):  
Fossil Fuels ◽  
Hot Water ◽  
Climate Data ◽  
Ghg Emission ◽  
Water Heater ◽  
Ghg Mitigation ◽  
Solar Water ◽  
Water Heaters ◽  
Industrial Sectors ◽  
Solar Water Heaters

Solar water heaters (SWHs) are one of the most effective plans for general and easy use of solar energy to supply hot water in domestic and industrial sectors. This paper gives the first-ever attempts to assess the optimal localization of SWHs across 22 major cities in Zambia, as well as determine the possibility of hot water generation and model the greenhouse gas (GHG) emission saving. The climate data used is extracted by using the MeteoSyn software which is modeled in TSOL™. Results show the high potential of GHG emission reduction due to nonconsumption of fossil fuels owing to the deployment of SWHs, and three cities Kabwe, Chipata, and Mbala had the highest GHG mitigation by 1552.97 kg/y, 1394.8 kg/y, and 1321.39 kg/y, respectively. On average, SWHs provide 62.47% of space heating and 96.05% of the sanitary hot water requirement of consumers. The findings have shown the potential for the deployment of SWHs in Zambia. The techno-enviro study in this paper can be used by the policymakers of Zambia and countries with similar climates.

Electrodeposition of selective coatings based on black nickel for flat-plate solar water heaters

Solar Energy ◽  
2019 ◽  
Vol 194 ◽  
pp. 302-310 ◽  
Author(s):  
F.I. Lizama-Tzec ◽  
D.M. Herrera-Zamora ◽  
O. Arés-Muzio ◽  
V.H. Gómez-Espinoza ◽  
I. Santos-González ◽  
...  
Keyword(s):  
Flat Plate ◽  
Solar Water ◽  
Water Heaters ◽  
Solar Water Heaters ◽  
Black Nickel

Thermal Properties Study of a Solar Water Heater Tank with a Mantle Exchanger

2014 ◽  
Vol 3 (1) ◽  
pp. 92-100 ◽  
Author(s):  
Mourad Chikhi ◽  
Rabah Sellami ◽  
Nachida Kasbadji Merzouk
Keyword(s):  
Heat Exchanger ◽  
Renewable Energy Sources ◽  
Supply And Demand ◽  
Research Work ◽  
Solar Water Heater ◽  
Water Heater ◽  
Solar Water ◽  
Incentive Programs ◽  
Water Heaters ◽  
Solar Water Heaters

The development and use of renewable energy sources and technologies are becoming vital for the management of energy supply and demand. For development solar water heaters, the incentive programs are supported by the Algerian government to generalize the using of this kind of energy especially in Sahara. This study is a part of program to develop a new solar water heater in UDES (Algeria). In this research work, the thermal performance of a solar water heater with a mantle heat exchanger is investigated numerically using Comsol Multyphysics software. The objective is to investigate the influence of the mantle heat exchanger thickness on the performance of solar water heaters. The results show, for 160 liters capacity of the solar water heaters tank, the 13mm of the heat exchanger thickness leads to improve the efficiency of the solar water heater.

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%.

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