Design of Solar Water Heater Using Collector Cylindric Parabolic and Coil Heater as Absorber at Focus Point (original) (raw)
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International Journal for Research in Applied Science and Engineering Technology (IJRASET), 2022
This project is focused on carrying out a study of the absorber geometry of the parabolic solar collector compound for heating water for sanitary use, to evaluate the temperature gradient between the inlet and outlet of the water of this concentraDDDtor collector, and the efficiency achieved according to the absorber configuration to later compare it with collectors with a conventional flat absorber surface. The parabola of the reflector of the composite parabolic solar collector was obtained considering the circular absorber, with a concentration ratio of 4 plus 10% of this, to consider a truncation of the reflector, the circular absorber was configured with a small absorber plate of aluminum which has a thermal conductivity of 401 W /mK The values obtained experimentally in the collector were based on the data collected in the field files. It was considered to experience the heating of water on different days with the climatic conditions, cloudy, partially cloudy and sunny, with a totally clear sky. The water heating tests were carried out with two types of geometric configuration of the absorber of the composite parabolic solar collector; circular absorber and configured circular absorber, with which a water outlet temperature of 61 ° C and 76 ° C and a thermal efficiency of 60% respectively were obtained, these results were presented taking into account a climatic condition (sunny day) approximately the same for the two absorber configurations, and with average values of wind speed, ambient temperature and solar radiation.
Analysis of the Performance of a Solar Water Heating System with Flat Collector
International Journal of Energy and Power Engineering, 2015
The thermal performance of a solar water heating with 1.00 m2 flat plate collectors in Cascavel-PR, is which presented in this article, paper presents the solution to leverage the marketing of solar heating systems through detailed constituent materials of the solar collector studies, these abundant materials in construction, such as expanded polyethylene, PVC, aluminum and glass tubes, mixing them with new materials to minimize loss of efficiency while decreasing its cost. The system was tested during months and the collector obtained maximum recorded temperature of outlet fluid of 55°C, while the maximum temperature of the water at the bottom of the hot water tank was 35°C. The average daily energy collected was 19.6 MJ/d; the energy supplied by the solar plate was 16.2 MJ/d; the loss in the feed pipe was 3.2 MJ/d; the solar fraction was 32.2%, the efficiency of the collector was 45.6% and the efficiency of the system was 37.8%.
Experimental Study on a Line-Axis Concentrating Solar Energy Collector for Water Heating
International Journal of Fluid Mechanics & Thermal Sciences
This paper examines the experimental study on a line axis concentrating solar energy collector for water heating. The system considered consists of cylindrical solar radiation concentrator with a black coated tubular absorber positioned along its axis. A cold water tank is placed above the collector and a hot water tank positioned below it such that fluid flows in and out of the set up. Solar radiation absorber inlet header is connected to the cold water tank while its outlet header is connected to the hot water tank. These major components are supported by angle iron raised at a distance from the ground that depends on the location and function. Valves are used at strategic points on the connecting pipe lines to isolate the flow of water. When water is poured into the cold water chamber, and the control valve turned on, the water flows under gravity into the receiver/absorber tube. At the absorber section, heat is transferred from the steel tube to the circulating water and is consequently heated. The heated water, then flows into the returning tube against gravity, thereby restricting the heated water from flowing into the storage tank. At this stage, thermo-siphoning effect comes into play. As the temperature of the water increases, its density reduces while the mass remains constant in order to balance the effect of the reduction in density. Thus, there is a resultant increase in volume which consequently pushes the water level further along the returning pipe. Further increase in temperature reduces the water density and increases the volume of the water, thereby causing the heated water to flow into the insulated tank. Several experimental tests were carried out under meteorological condition at the Federal University of Technology Owerri, Nigeria at three different mass flow rates of 0.001kg/s, 0.002kg/s and 0.003kg/s. The solar water heater was tested while oriented in the East-West and North-South directions in order to determine the effects of orientation on the performance. Results obtained showed that a maximum temperature of 69.5°C, corresponding to 34.5°C increase in water temperature and a maximum instantaneous efficiency of 51.01% is possible. The aim of the study is to design a cheaper solar energy system capable of reducing energy bill within the developing countries of the world.
Design, Fabrication and Performance Test of an Improved Solar Water Heater
International Conference on Mechanical, Industrial and Materials Engineering 2013 (ICMIME2013) 1-3 November, 2013, RUET, Rajshahi, Bangladesh. , 2013
Solar water heater is a device or combination of equipment which works to heat water and this project of solar water heater have no requirement of utilizing other energy. Many works have been done on this topics but the major intension of the authors are to construct an improved version of the existing one (in case of performance efficiency, size and so on). In the way of this the design and construction materials have changed for the improved version. In case of design-alignment, spacing of the absorber pipe, absorbing surface analysis has emphasized more. And in case of material-heat absorption capacity, insulation nature, radiation capability etc. has emphasized more. As a result performance efficiency has increases. In case of achieving same performance, its size also reduces than previous collectors. Because of its less size it also required less material and cost reduces in that case also (though the materials used in this project are more expensive).
“Experimental Analysis of Solar Water Heater, with Heat Exchanger”
IOSR Journal of Mechanical and Civil Engineering, 2017
Solar energy is a very large, inexhaustible source of energy. The power from the sun which is intercepted by the earth is tremendously larger than the present consumption rate on the earth of all the commercial energy sources. Therefore the fabrication of such a solar water heater is done which can utilize this energy in a better way. Square shaped aluminium tube coated with a black paint constitutes the solar absorber on the above collector. The copper heat exchanger is placed between solar collector and water tank. To improve its efficiency distilled water is made to flow through the collector and then its testing is carried out and some desirable results were acquired.
Experimental analysis of solar water heater with compound parabolic concentrator
EAI Endorsed Trans. Energy Web, 2021
Among all the non-conventional energy sources, solar energy is one of the most promising and renewable alternative source. Solar water heater can be one of the medium to make best use of this renewable energy for human betterment. The current work is targeted to examine the performance of solar water heater with different absorber plates viz flat plate, VTrough and compound parabolic concentrator. The developed system is intended to supply hot water for a family at a low cost. This is regional study and illustrates how selecting a proper concentrator can increase the thermal efficiency of this solar based system. It was experimentally found that, the solar water heater with compound parabolic concentrator profile as absorber outshines over other two models giving 20.58% more efficient results than V Trough whereas V Trough gives us 20.37% more efficient results than Flat plate. Also, it is found that, less mass flow rate is required for obtaining higher degree of temperature in case...
Experimental Investigation of a Semi Circular trough Solar Water Heater1
Abstract—This paper studies the experimental analysis of a semi circular trough absorber solar water heater with baffles for improving the outlet water temperature. To increase the contact time of water with solar radi ation and decreasing the flow rate of water baffles are kept in the absorber at a distance of 0.1 m. Studies are conducted for different flow rates of water in the absorber and flow rates increased by 2, 4, 8 and 16 times the minimum mass flow (mf = 0.133 kg/min). Results show that there is an increase in the outlet water tempera ture by 75 and 65% with respect to inlet temperature during summer and winter with an average inlet temper ature of 34°C at minimum mass flow. The maximum water temperature during summer and winter conditions are found as 65 and 60°C respectively. Also, results show that the percentage increase in temperature of outlet water and average water temperature depends on solar intensity.
Design and Analysis of Parabolic Trough Solar Water Heating System
Journal of Architectural Environment & Structural Engineering Research
Renewable energy technology is one of the prospective sources which can meet the energy demand and can contribute to achieve sustainable development goals. Concentrated collectors are widely used in solar thermal power generation and water heating system also. It is very popular due to its high thermal efficiency, simple construction requirements and low manufacturing cost. This paper is concerned with an experimental study of parabolic trough collector for water heating technology. It focuses on the performance of concentrating solar collector by changing the reflector materials (aluminum sheet, aluminum foil and mirror film). In Bangladesh, it is possible to use low cost solar concentrating technologies for domestic as well as industrial process heat applications. The line focusing parabolic trough collectors have been designed, developed and evaluated its performance by collecting solar radiation, inlet and outlet water temperature, flow rate, efficiency etc.
Sustainability
Buildings represent approximately two-thirds of the overall energy needs, mainly due to the growing energy consumption of air conditioning and water heating loads. Hence, it is necessary to minimize energy usage in buildings. Numerous research studies have been carried out on evacuated tube solar collectors, but to our knowledge, no previous study has mentioned the combination of an evacuated tube solar collector with a parabolic trough collector and a helical coil heat exchanger. The objective of this paper is to evaluate the thermal behavior of an innovative evacuated tube solar collector (ETSC) incorporated with a helical coil heat exchanger and equipped with a parabolic trough collector (PTC) used as a domestic water heater. To design the parabolic solar collector, the Parabola Calculator 2.0 software was used, and the Soltrace software was used to determine the optical behavior of a PTC. Moreover, an analytical model was created in order to enhance the performance of the new mo...
Performance Analysis of Active Solar Water Heating System
Iconic Research And Engineering Journals, 2018
The objective of this thesis is to investigate the temperature distribution in a flat-plate solar collector tube by experimentally and numerically. Experimental study is performed on a small scale flat-plate solar collector in December at Mandalay 21.98˚latitude and 96.1˚longitude. The cover and absorber plate are made of glass (0.9144m length×0.6096m width) and steel (0.762m length×0.5558m width). The riser tubes are made of steel with 0.014m diameter and 0.762m length respectively. The back cover is insulated with foam of 0.0254m thickness. The absorber plate transfers heat energy to water flowing in the tubes. The flow can takes place due to thermosyphon effect. However, certain energy absorbed by temperature of the plate which in turn is dependent on the nature of flow of water inside the tube, solar insolation, collector inclination angle, number of riser tube, ambient temperature and material. According to the experimental results, the highest water outlet temperature is 50˚C at 31th December with collector efficiency 35% while the ambient temperature is 29˚C. Then, the water outlet temperature from experiment is compared with numerical analysis. From this research, useful factors can be provided to apply for industrial water heating.