Modified Hottel-Whillier-Bliss Equation for Active Solar Distillation System for Higher Yield and Thermal Efficiency

2021 ◽  
pp. 1-26
Author(s):  
G N Tiwari ◽  
Md Meraj ◽  
M.E. Khan ◽  
Md Azhar
Keyword(s):  
Flat Plate ◽  
Characteristic Curve ◽  
New Delhi ◽  
Packing Factor ◽  
System A ◽  
Solar Distillation ◽  
Distillation System ◽  
Significant Difference ◽  
Typical Day ◽  
Flat Plate Collector

Abstract Based on energy balance equations for a photo-voltaic thermal (PVT) active solar distillation system, a modified Hottel-Whillier-Bliss (HWB) analytical characteristic equation as a function of design and climatic parameters has been derived in the present manuscript. It has been found that there is significant difference between characteristic equations for PVT based active solar distillation and conventional flat plate collector (FPC). It is due to (i) opposite nature of loss factor from inside surface to ambient through glass cover and (ii) temperature dependence of evaporative heat transfer coefficient between water surface and condensing cover in solar distillation system. Numerical computations have been obtained for characteristic curve of the proposed active solar distillation system and flat plate collector under the condition of a typical day of New Delhi, India. Further, effect of performance parameters such as packing factor, electrical efficiency of individual PVT collectors, water mass etc. have also been studied for the proposed active PVT solar distillation system. Moreover, daily yield of portable water has been found 7.34 kg m−2 at n = 5 and βc = 0.25 which is 100.5 % higher than the daily yield of 3.66 kg m−2 obtained at n = 1, βc = 0.89.

Exergoeconomic and enviroeconomic analyses of partially covered photovoltaic flat plate collector active solar distillation system

Desalination ◽  
2015 ◽  
Vol 367 ◽  
pp. 186-196 ◽  
Author(s):  
G.N. Tiwari ◽  
J.K. Yadav ◽  
D.B. Singh ◽  
I.M. Al-Helal ◽  
Ahmed Mahmod Abdel-Ghany
Keyword(s):  
Flat Plate ◽  
Solar Distillation ◽  
Distillation System ◽  
Flat Plate Collector

First and Second Law Analysis of a Flat Plate Collector Working With Nanofluids

2018 ◽  
Author(s):  
M. T. Nitsas ◽  
I. P. Koronaki ◽  
L. Prentza
Keyword(s):  
Flat Plate ◽  
Second Law Of Thermodynamics ◽  
Climatic Conditions ◽  
Working Fluid ◽  
Second Law ◽  
Inlet Temperature ◽  
Water Tank ◽  
Systems Quality ◽  
Typical Day ◽  
Flat Plate Collector

The utilization of solar energy in thermal energy systems was and always be one of the most effective alternative to conventional energy resources. Energy efficiency is widely used as one of the most important parameters in order to evaluate and compare thermal systems including solar collectors. Nevertheless, the first law of thermodynamics is not solely capable of describing the quantitative and qualitative performance of such systems and thus exergy efficiency is used so as to introduce the systems’ quality. In this work, the performance of a flat plate solar collector using water based nanofluids of different nanoparticle types as a working fluid is analyzed theoretically under the climatic conditions in Greece based on the First and Second Law of Thermodynamics. A mathematical model is built and the model equations are solved iteratively in a MATLAB code. The energy and exergy efficiencies as well as the collector losses coefficient for various parameters such as the inlet temperature, the particles concentration and type are determined. Moreover, a dynamic model is built so as to determine the performance of a flat plate collector working with nanofluids and the useful energy that can be stored in a water tank. The exergy destruction and exergy leakage are determined for a typical day in summer during which high temperatures and solar intensity values are common for the Greek climate.

Experimental Analysis of a Flat Plate Solar Collector System for Small-Scale Desalination Applications

2014 ◽  
Vol 984-985 ◽  
pp. 800-806
Author(s):  
G. Jims John Wessley ◽  
P. Koshy Mathews
Keyword(s):  
Solar Radiation ◽  
Flat Plate ◽  
Heating System ◽  
Maximum Temperature ◽  
Small Scale ◽  
Collector System ◽  
Typical Day ◽  
Flat Plate Solar Collector ◽  
Solar Water Heating System ◽  
Flat Plate Collector

This paper presents the results of the experimental investigation on a solar flat plate collector carried out at Coimbatore, India (11°N Latitude and 74°E Longitude). The collector tubes allowed the water to flow twice across the flat plate collector using a circulating pump during which the water gets heated by the solar radiation received by the absorber. The maximum temperature of water obtained on a typical day in the month of April was 64°C with a solar radiation of 932.2651 W/m2. The available solar radiation strongly influences the temperature gain of the system while the wind velocity plays a considerable role in influencing the heat lost by the system. It is observed that the two-pass flow of water across the absorber plate results in a maximum temperature gain with an overall collector efficiency of 43.7 %. This solar water heating system using flat plate collector can be used for small-scale desalination applications.

Enhancement of Productivity on Double Slope Single Basin Solar still by Flat Plate Collector and Sponge

2015 ◽  
Vol 813-814 ◽  
pp. 690-694
Author(s):  
J. Prabahar ◽  
Thangavel Balusamy ◽  
Varghese M. John
Keyword(s):  
Solar Radiation ◽  
Flat Plate ◽  
Natural Resource ◽  
Pure Water ◽  
Hard Water ◽  
Solar Still ◽  
Living Thing ◽  
Solar Distillation ◽  
Flat Plate Collector

One of the essential needs of a living thing on earth is the pure water and nowadays this valuable natural resource is facing severe scarcity problems. Solar distillation is a better choice to minimize this problem by harvesting solar radiation in solar still and thereby producing pure water from hard water or brine. In this work, an attempt was made to enhance the productivity of still by flat plate collector, sponge, the combination. Finally, the productivity of the simple still was compared with that of a flat-plate collector, sponge, the combination. Use of flat plate collector and sponge increases the overall temperature of the still water and enhance the evaporation respectively thereby this will improve the condensate production of the solar still. It was observed that productivity increased by 14% in case of still with a collector, 10% for still with a sponge and 17% for still with collector sponge combination when compared with simple still.

scholarly journals DESIGN, FABRICATION AND EXPERIMENTAL STUDY OF A FLAT PLATE COLLECTOR SIMULATOR

2016 ◽  
Vol 15 (1) ◽  
pp. 50
Author(s):  
O. R. S. Rodríguez ◽  
R. N. N. Koury ◽  
A. A. T. Maia
Keyword(s):  
Power Systems ◽  
Flat Plate ◽  
Heat Pumps ◽  
Operating Characteristics ◽  
Electrical Systems ◽  
System A ◽  
Auxiliary Power ◽  
Real Behavior ◽  
Flat Plate Collector ◽  
Simulation Parameters

In this article, a flat plate collector simulator was designed and developed based on the use of electric heaters and a power control system. A computational algorithm aimed at determining the relationship between the incident solar energy on the collector absorber plate and the corresponding amount of power that must be supplied by the electrical resistance was developed. The variation in power is obtained by regulating the voltage fed through the assembly. With such regulation, simulating typical profiles of insolation over a day was possible. In the assessment of the average solar radiation data obtained by satellite imagery analysis (SWERA Project), the results showed that the thermal behavior of the simulator collector was close with a real behavior. Therefore, it can be used to determine the operating characteristics of auxiliary power systems as heat pumps, electrical systems or water heating systems. Different thermodynamic processes to determine the main losses of a collector evaluated the simulation parameters.

scholarly journals Mathematical modelling of heat and mass transfer in a roof type solar distillation system

2021 ◽  
Vol 40 (2) ◽  
pp. 261-268
Author(s):  
F. Onoroh ◽  
S.S. Folorunsho ◽  
M. Ogbonnaya ◽  
U.P. Onochie
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Practical Significance ◽  
System A ◽  
Solar Distillation ◽  
Proposed Model ◽  
Distillation System ◽  
Perform Sensitivity Analysis ◽  
The Heat Transfer Coefficient

This research examined the performance of a roof type solar distillation system. A model was developed that captured the influence of the cover angle on still performance in terms of evaluating the heat transfer coefficient, yield and efficiency. The previous models of evaluating these matric has been shown to be unsatisfactory due to over prediction. The objectives are to clarify the misconception on the efficiency, to validate the derived expression for the Nusselt’s number of condensation under an inclined surface and to perform sensitivity analysis on the dimensionless parameters with derived models. The derived model has a practical significance because it provides much information on the dependence of the heat transfer coefficient on the cover angle. The model was solved with MATLAB, and results show a well correlated trends with the established work of literature and the proposed model having the lest efficiency as the model is without the over prediction inherent in other models due to non-inclusion of evaporation in the analysis of free convection of air. The peak yield of all the models occurs at about 11:00 AM, with the proposed model having a peak yield of about 0.045kg.

ENHANCEMENT OF THERMAL PERFORMANCE OF SOLAR FLAT PLATE COLLECTOR USING SiO2 NANOFLUID

2017 ◽  
Vol 12 (4) ◽  
pp. 33 ◽  
Author(s):  
DALWADI M.D. ◽  
NAIK H.K. ◽  
PADHIAR R.D. ◽  
RANA S.S. ◽  
CHAVDA N.K. ◽  
...  
Keyword(s):  
Flat Plate ◽  
Thermal Performance ◽  
Flat Plate Collector
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