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Desai, N. B.
- A1 MW National Solar Thermal Research Cum Demonstration Facility at Gwalpahari, Haryana, India
Authors
1 Department of Energy Science and Engineering, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, IN
Source
Current Science, Vol 109, No 8 (2015), Pagination: 1445-1457Abstract
Concentrated solar power (CSP) plants have invited wide attention in various sunlight-rich regions around the world, including India. Under sponsorship of the Ministry of New and Renewable Energy, Government of India, the Indian Institute of Technology Bombay, Mumbai has conceptualized and carried out the basic engineering design, installation, commissioning and operation of a 1 MW(e) CSP plant in the campus of the National Institute of Solar Energy at Gwalpahari, near Gurgaon, Haryana, India. This is a unique facility integrating two different solar collector fields; direct steam-generating linear Fresnel reflector (LFR) field and conventional heat transfer fluid-based parabolic trough collector (PTC) field. It is a researchcum- demonstration facility intended to enable the development of future cost-effective CSP plants in the country. The design basis, brief description of the power plant, learning experiences during commissioning and operation of the plant, as well as preliminary performance results are presented here. The plant is grid-connected and operational. The preliminary results show low performance due to the lower optical efficiencies of both the collector fields, tracking error, loop imbalance of PTC field, and improper receiver size of LFR field.Keywords
Concentrating Solar Power Plants, Linear Fresnel Reflector, Parabolic Trough Collector, Researchcum-Demonstration Facility.Full Text
References
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- Effect of Gamma Radiation on Magnetic Properties of Magnesium Zinc Ferrite
Authors
1 Department of Physics, Kuvempu University, Shankarghatta, Karnataka, IN
Source
International Journal of Innovative Research and Development, Vol 5, No 11Sp (2016), Pagination: 28-31Abstract
The Magnesium-Zinc Ferrite with a composition of Mg(1-x)ZnxFe2O4(X=0.2,0.4,0.6 and 0.8). Ferrite powders have been successfully prepared by solid state reaction. The structural, morphological and composition studies were done by using by X-ray diffraction, high resolution scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The prepared samples are irradiated to high energy gamma radiation of 60Co source of energy 6.972 k Gy per hour (dose: 300 k Gy and 500 k Gy). The XRD spectra are obtained for the irradiated samples and compared with that of the pristine samples to study the changes in the structure. The increase in crystallite size with of radiation dose is observed. The Hysteresis curves were measured using vibrating sample magneto meter (VSM) for both irradiated and un irradiated samples, the results showed a considerable change in saturation magnetization with radiation dose. This may be due to ion induced disorder, cat ion distribution.
Keywords
Gamma Radiation, Mg Zn Ferrite, Magnetic Materials, Magnetic Properties.Full Text