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Thermal Modeling and Performance Evaluation of Solar Greenhouse for Nursery Raising

KrishiKosh

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Title Thermal Modeling and Performance Evaluation of Solar Greenhouse for Nursery Raising
 
Creator Sengar, S.H.
 
Contributor Kothari, Surendra
 
Subject null
 
Description Thermal Modeling and Performance Evaluation of Solar Greenhouse for Nursery Raising
A mathematical model has been developed by considering various heat and mass transfer process at different component of greenhouse, for the prediction of its thermal performance. The complete analysis has been done in study for prediction of floor, crop, greenhouse air and cover temperatures.
To see the effect of temperature and solar radiation separately parametric studies have been done. It was found that the maximum increase in greenhouse air temperature is 13.92 oC for a solar radiation of 500 W/m2.
An hourly value of soil temperature, plant temperature, greenhouse temperature and cover temperatures has been calculated by finite difference method for typical days of different months for Udaipur region. The developed model has been validated with experimental values. Experimental and predicted values of greenhouse air temperature were found almost same with a variation of 2 0C to 5 0C. Therefore it may be inferred from these results that theoretical values are in reasonably good agreement with experimental results. Three microclimatic parameters namely, maximum-minimum temperature, maximum-minimum relative humidity and soil temperature at different depths were observed during the experimental period and found suitable for raising nursery even during off-season.Experimental results indicates that the survival percentage of sprouted cuttings in Champa, Golden duranta, Bougainvillea, Croton, Hibiscus, Rose and Papaya were 90 per cent, 70 per cent, 77 per cent, 75 per cent, 63 per cent, 65 per cent and 75 per cent respectively.
The results of the economic analysis reveals that NPW of investment made on greenhouse when plants Champa, Golden duranta, Bougainvillea, Croton, Hibiscus, Rose and Papaya were grown inside the greenhouse is Rs. 354822 /-, Rs. 248167.9 /-, Rs. 285310 /-, Rs. 273077 /-, Rs. 343823 /-, Rs. 453221 /- and Rs. 220919 /- respectively where as internal rate of return for two years was 37 per cent, 19 per cent, 26 per cent, 24 per cent, 35 per cent, 53 per cent, 14 per cent respectively as well as benefit cost ratio was 3.8, 3.0, 3.3, 3.2, 3.8, 4.5 and 2.8 respectively and payback period comes out to be 3.7, 3.5, 3.03, 3.2, 2.7 and 4 years respectively.
 
Date 2017-06-02T05:56:15Z
2017-06-02T05:56:15Z
2007
 
Type Thesis
 
Identifier Sengar and Kothari, 2007
http://krishikosh.egranth.ac.in/handle/1/5810013886
 
Language en
 
Format application/pdf
 
Publisher MPUAT, Udaipur