Modeling and simulation of a vertical multi-effect diffusion solar still coupled with a tracking solar system and a PV/T-SWH system

2021 ◽  
pp. 1-29
Author(s):  
Mahmoud Boubekri ◽  
Abla Chaker ◽  
Souad Saadi
Keyword(s):  
Tracking System ◽  
Continuous Production ◽  
Climatic Conditions ◽  
Hot Water ◽  
Percentage Increase ◽  
Solar Water Heater ◽  
Solar Still ◽  
Water Heater ◽  
Solar Tracking ◽  
Production Growth

Abstract This paper aims to study the productivity of a vertical multi-effect diffusion solar still (VMEDSS) coupled with a solar tracking system and a photovoltaic/thermal solar water heater system (PV/T-SWH). The studied system can run continuously over 24 h to have a continuous production. The experimental climatic conditions of Ksar Challala (35° 13' 12.835" N, 2° 19' 2.035" E, Altitude: 800 m) in Algeria are used in this study, for two days: one in summer and one in winter. The obtained results were compared with those of the vertical still oriented southward. The results show clearly the effect of the solar tracking system on the increase of the still production during summer and winter. The production percentage increase has reached: 293.01 % in summer and 15.1 % in winter. Feeding the still equipped with a tracking system with hot water produced by the PV/T-SWH system gives good productivities during summer and winter where the increase in production reaches respectively: 733.76 % and 415.55 %. The percentage production growth of the vertical still oriented southward fed with hot water is 376.38% and 394.78% of the days of summer and winter respectively.

scholarly journals Evaluation of a High-Performance Solar Home in Loveland, Colorado

2006 ◽  
Vol 129 (2) ◽  
pp. 226-234
Author(s):  
Robert Hendron ◽  
Mark Eastment ◽  
Ed Hancock ◽  
Greg Barker ◽  
Paul Reeves
Keyword(s):  
High Performance ◽  
Energy Savings ◽  
High Efficiency ◽  
Building Envelope ◽  
Operating Conditions ◽  
Hot Water ◽  
Space Heating ◽  
Solar Water Heater ◽  
Water Heater ◽  
Solar Water

Building America (BA) partner McStain Neighborhoods built the Discovery House in Loveland, CO, with an extensive package of energy-efficient features, including a high-performance envelope, efficient mechanical systems, a solar water heater integrated with the space-heating system, a heat-recovery ventilator (HRV), and ENERGY STAR appliances. The National Renewable Energy Laboratory (NREL) and Building Science Consortium conducted short-term field-testing and building energy simulations to evaluate the performance of the house. These evaluations are utilized by BA to improve future prototype designs and to identify critical research needs. The Discovery House building envelope and ducts were very tight under normal operating conditions. The HRV provided fresh air at a rate of about 35L∕s(75cfm), consistent with the recommendations of ASHRAE Standard 62.2. The solar hot water system is expected to meet the bulk of the domestic hot water (DHW) load (>83%), but only about 12% of the space-heating load. DOE-2.2 simulations predict whole-house source energy savings of 54% compared to the BA Benchmark (Hendron, R., 2005 NREL Report No. 37529, NREL, Golden, CO). The largest contributors to energy savings beyond McStain’s standard practice are the solar water heater, HRV, improved air distribution, high-efficiency boiler, and compact fluorescent lighting package.

A new hybrid desalination system using wicks/solar still and evacuated solar water heater

Desalination ◽  
2013 ◽  
Vol 325 ◽  
pp. 56-64 ◽  
Author(s):  
Z.M. Omara ◽  
Mohamed A. Eltawil ◽  
ElSayed A. ElNashar
Keyword(s):  
Solar Water Heater ◽  
Solar Still ◽  
Water Heater ◽  
Solar Water

scholarly journals Experimental Study of Solar Water Heater under the Libyan Climate Conditions

2020 ◽  
Vol 14 (9) ◽  
pp. 28
Author(s):  
Ali. J. S. Alrafad ◽  
Abdihg S. Alrafad ◽  
Tarek. Hamad ◽  
Ahmed. Nassar
Keyword(s):  
Fossil Fuel ◽  
Hot Water ◽  
Solar Water Heater ◽  
Way Of Life ◽  
Water Heater ◽  
Climate Conditions ◽  
Solar Water ◽  
Solar Heater ◽  
Glass Surfaces ◽  
Local Materials

In our modern societies, One of the main and simplest signature traits is hot water as a convenient and efficient way of life either for industrial and domestic purposes, however, obtaining hot water in most cases will be through fossil fuel either by direct burning for the fuel for heating or indirectly by using electricity that generated by fossil fuel. Using solar heaters will limit the in some extent the usage of fossil fuel. A flat solar water heater of (165 to 175) cm3 has been constructed to be used as a model for educational purposes. The solar heater is made of local materials consist of galvanized iron pipes, glass surfaces, wool insulation, aluminum frame, and fixed iron base. Moreover, Thermocouples, pyranometer, and an anemometer were used to test the performance of the heater in four days in May for the angle of inclination of the complex 320 is on the horizontal. In conclusion, the daily average efficiency was around 57%. The temperature in the tank is about  62 0C at noon, which is sufficient for home use throughout the day.

scholarly journals Evaluation of a High-Performance Solar Home in Loveland, Colorado

Solar Energy ◽  
2005 ◽  
Author(s):  
Robert Hendron ◽  
Mark Eastment ◽  
Ed Hancock ◽  
Greg Barker ◽  
Paul Reeves
Keyword(s):  
High Performance ◽  
Energy Savings ◽  
High Efficiency ◽  
Building Envelope ◽  
Operating Conditions ◽  
Hot Water ◽  
Space Heating ◽  
Solar Water Heater ◽  
Water Heater ◽  
Solar Water

Building America (BA) partner McStain Neighborhoods built the Discovery House in Loveland, Colorado, with an extensive package of energy-efficient features, including a high-performance envelope, efficient mechanical systems, a solar water heater integrated with the space-heating system, a heat-recovery ventilator (HRV), and ENERGY STAR™ appliances. The National Renewable Energy Laboratory (NREL) and Building Science Consortium (BSC) conducted short-term field-testing and building energy simulations to evaluate the performance of the house. These evaluations are utilized by BA to improve future prototype designs and to identify critical research needs. The Discovery House building envelope and ducts were very tight under normal operating conditions. The HRV provided fresh air at a rate of about 75 cfm (35 l/s), consistent with the recommendations of ASHRAE Standard 62.2. The solar hot water system is expected to meet the bulk of the domestic hot water (DHW) load (>83%), but only about 12% of the space-heating load. DOE-2.2 simulations predict whole-house source energy savings of 54% compared to the BA Benchmark [1]. The largest contributors to energy savings beyond McStain’s standard practice are the solar water heater, HRV, improved air distribution, high-efficiency boiler, and compact fluorescent lighting package.

scholarly journals Design and Implementation of a Parabolic Cylinder Collector with Solar Tracking to obtain hot water

2018 ◽  
Vol 57 ◽  
pp. 02003 ◽  
Author(s):  
Wilson E. Sánchez ◽  
Mario P. Jiménez ◽  
Carlos A. Mantilla ◽  
José M. Toro ◽  
Miguel A. Villa ◽  
...  
Keyword(s):  
Heat Pipe ◽  
Tracking System ◽  
Heating System ◽  
Hot Water ◽  
Parabolic Cylinder ◽  
Charging System ◽  
Design And Implementation ◽  
Solar Tracking ◽  
Deflection Analysis ◽  
Solar Tracker

This investigation describes the design and implementation of a parabolic trough solar collector (PCC) with solar tracking to obtain hot water. The solar radiation available at the installation site is analyzed, followed by the design and construction of the mechanical system, making a series of calculations for the dimensioning of the reflective base, and a stress and deflection analysis of the structure is performed to verify the feasibility of the design in the ANSYS software. An analysis of the solar tracking system is performed, which is dimensioned from the PCC structure to determine the type of solar tracker to implement; The charging system, consisting of a solar panel and a battery, is dimensioned for the power supply of the tracking system; as a last point, for the heating system is determined the amount of water that is able to heat the system from the energy analysis at the installation site, the heating system is based on placing a Heat Pipe, in the focus of the parabola to receive the solar rays reflected by the collector and heat exchange to the water from a thermowell where the heat pipe condenser enters, finally tests are carried out in the PCC implemented obtaining a global efficiency of 16.37%.

The Device of the Automatic Backflow in Solar Water Heater-Temperature Control and Backflow for Pipe of Water Heater

2013 ◽  
Vol 827 ◽  
pp. 99-104
Author(s):  
Bin Li ◽  
Xi Chen ◽  
Xin Hao Li ◽  
Lu Kuan Ma ◽  
Wen Bo Lu ◽  
...  
Keyword(s):  
Water Resources ◽  
Cold Water ◽  
Hot Water ◽  
Water Tank ◽  
Solar Water Heater ◽  
Recycle Water ◽  
Delay Effect ◽  
Water Heater ◽  
Domestic Water ◽  
Solar Water

Now in general use in solar water heater, there is a long pipeline between water heater and tap, we have to empty the stored cold water before we use the hot water; and usually the water cannot meet required temperature due to the heating delay effect, thus the water also should be emptied, which leads to a waste of water resources. In order to solve this water wastage, we propose a device which can help to control the temperature and backflow of the water in water heater. The device accomplishes backflow of cold water automatically under the effect of gravity, and refluxed water will be stored in the recycle-water tank, thus ensuring the result that the water temperature satisfies the requirement. After the recycle-water tank is full, it will trigger the buoy to control the relay switch, then the water pump start to work to force the water into the water heater tank. Thus, realizing the recycling of water. This device can significantly save water resources in domestic water, and it has a broad market prospect.

Second-Law Analysis of a Two-Phase Self-Pumping Solar Water Heater

1992 ◽  
Vol 114 (3) ◽  
pp. 188-193 ◽  
Author(s):  
H. A. Walker ◽  
J. H. Davidson
Keyword(s):  
Heat Transfer ◽  
Entropy Generation ◽  
Hot Water ◽  
Solar Water Heater ◽  
Total Entropy ◽  
Water Heating ◽  
Water Heater ◽  
Two Phase ◽  
Solar Water ◽  
Order Of Magnitude

Entropy generated by operation of a two-phase self-pumping solar water heater under Solar Rating and Certification Corporation rating conditions is computed numerically in a methodology based on an exergy cascade. An order of magnitude analysis shows that entropy generation is dominated by heat transfer across temperature differences. Conversion of radiant solar energy incident on the collector to thermal energy within the collector accounts for 87.1 percent of total entropy generation. Thermal losses are responsible for 9.9 percent of total entropy generation, and heat transfer across the condenser accounts for 2.4 percent of the total entropy generation. Mixing in the tempering valve is responsible for 0.7 percent of the total entropy generation. Approximately one half of the entropy generated by thermal losses is attributable to the self-pumping process. The procedure to determine total entropy generation can be used in a parametric study to evaluate the performance of two-phase hot water heating systems relative to other solar water heating options.

Numerical Simulation, Design, and Construction of a Double Glazed Compound Parabolic Concentrators-Type Integrated Collector Storage Water Heater

2015 ◽  
Vol 138 (1) ◽  
Author(s):  
Hamdi Kessentini ◽  
Chiheb Bouden
Keyword(s):  
Numerical Simulation ◽  
Climatic Conditions ◽  
Solar Water Heater ◽  
Simulation Design ◽  
Water Heater ◽  
Reference Case ◽  
Balance Energy ◽  
Energy Equations ◽  
Numerical Program ◽  
Design And Construction

The numerical simulation, design, and construction of a double glazed integrated collector storage (ICS) with compound parabolic concentrators (CPC) reflectors are presented. The design of the double glazing is optimized by means of numerical simulations under Tunisian climatic conditions. The numerical program used for the simulation consists on the transient resolution of the balance energy equations of each component of the solar water heater. Different proposed models of a double glazing are studied and compared with a reference case of a single glass ICS model. The simulation results have shown that the use of double glazing with argon layer and low-e coated lower glass instead of one glass cover significantly improves the thermal behavior of the ICS heater and visibly reduces its thermal losses during night. Taking into account these numerical results, a double-glazing ICS prototype-collector is constructed. The details of the construction, geometry, optical properties, and dimensions of the prototype are presented.

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