Subhra Das

Subhra Das
Amity University | AU · Department of Applied Sciences

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19
Publications
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115
Citations

Publications

Publications (19)
Article
Full-text available
Greenhouses are inflated structures with transparent covering that are used to grow crops under controlled climatic conditions. Crops are protected from extreme climate-related events by being enclosed. Furthermore, the greenhouse design ratio impacts the temperature and humidity distribution profile uniformity as well as the greenhouse. As a resul...
Chapter
Fixed charge transportation problem with interval parameters is studied in this paper. The total cost of transportation comprises of a fixed charge and transportation cost per unit of commodity transported from origin to destinations. Thus, unlike classical transportation problem, the objective function of fixed charge transportation problem is a n...
Conference Paper
Full-text available
Plants need air, and sunlight in adequate quantity for proper growth. In northern Himalayan Regions, during the winter months temperature goes down to below 0 ⁰C and maintaining the right temper-Ture for the growth of plants becomes a challenge for farmers. Greenhouse provides a solution to this problem by artificially creating a controlled climati...
Article
Thermal analysis of a house situated in Gulmarg made of composite walls comprising a solar photovoltaic (PV) panel and an epoxy/Al polymer has been performed analytically for a day. The PV panels absorb solar radiation; a part of it is used to produce electricity and the rest is converted to heat, which increases the temperature of the panel. The p...
Article
Full-text available
Parabolic trough collectors are used for concentrating solar radiation along the focal line. These collectors are commercially used for power generation. Approximately thirty-seven percent of the total cost is attributed to the solar field. In order to increase the economic viability of solar thermal power plants, there is a need to reduce the cost...
Chapter
Prediction of long-term performance of solar collectors is required for optimum solar system design. Availability of solar radiation above critical level ascertains utilization of solar radiation for useful energy gain by the systems. F chart method or the utilizability methods developed by Klein, Collares-Pereira, and Rabl are mainly used to simul...
Article
Full-text available
The escalation of energy demand in both developed and developing countries has prompted people to search and utilize clean and sustainable energy resources. Omshanti Retreat Centre (ORC) situated in Gurugram, Haryana, India utilizes solar energy to meet most of its energy demand. It has installed Scheffler dish type solar thermal cooking system hav...
Chapter
Metal oxide nano particles are potentially useful for heat transfer applications because of their chemical and physical properties. In this present study an attempt has been made to synthesize Fe2O3–Al2O3–CuO nano-composites by Co-precipitation method. The chemical, physical and thermal properties of the synthesized nano-particles were examined by...
Article
Short term forecasting of solar radiation is useful for power plant operations, grid balancing, real-time unit dispatching, automatic generation control and trading. Solar forecasting is an essential tool in solar PV power plant to improve quality of energy delivery to the grid and to reduce weather dependent ancillary costs. In this paper short te...
Article
Full-text available
Today supplier selection is a critical and demanding process for the industry, which provides the company with the accurate product/raw material and/or services at the right price at the right time and in the required quantities. Consequently, supplier selection become very important for maintaining planned association. The objective of this paper...
Article
Full-text available
The BIS test procedure for performance of solar flat plate collectors allows a certain limit of deviation for the control parameters to define the steady state condition. During actual performance studies, sometimes these limits are exceeded. In this paper an attempt has been made to find out the effect on the performance curve of the collector as...
Article
Full-text available
Detailed information about solar radiation availability at any location is essential for the design and economic evaluation of solar energy systems. Satellite data is used by researchers to estimate solar radiation where long term measured data are not available. This paper reviews the HELIOSTAT method, the DLR method for direct normal irradiance a...

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