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| Title: | Partial Replacement of Conventional Heat Energy by Solar Energy in the Production of Gypsum Plaster |
| Authors: | Kumar, Narendra
Saini, S K |
| Keywords: | Gypsum
Calcination
Decompose
Solar radiation
Thermic oil |
| Issue Date: | 28-Dec-2012 |
| Abstract: | Gypsum is one of the important industrial minerals. It is hydrous calcium sulphate (CaSO4.2H2O) having a composition of 79% calcium sulphate and 21% water. Gypsum in its natural form finds applications in the manufacture of hydraulic cements, ammonium sulphate fertilizer, sulphuric acid and soil reclamation for agriculture purposes. When calcined into the form of plaster of Paris and enriched with additives like accelerators, retarders, fillers and binders, the use of gypsum are varied and extensive. The calcined gypsum or plaster of Paris is used in building, pottery, ceramic and surgical according to its grade plaster.
A batch type energy efficient gypsum calcinator has developed few years back in Central Building Research Institute with the primary aim of replacing the traditional open pan method with an energy efficient system using fossil fuel. The primary source of energy is the fossils fuels and mostly being used for the energy consumption today. The reserves of fossils fuels are limited and they will not sustain for a long time. The widespread use of fossil fuels increasing the environmental degradation day by day particularly global warming, urban air pollution etc. Hence the need was felt to explore the use of renewable energy sources to meet the growing demand of energy. For calcining the gypsum, the temperature required is around 160oC inside the shell and this can be achieved by Solar energy. Solar energy is the most appropriate renewable energy that is collected from the radiations of Sun with the help of Solar thermal system. India is a sunny country with most parts receiving about 4 to 7 kilowatt hours of solar radiation per square meter per day with 250 - 300 sunny days in a year. This makes solar energy a very attractive option for generating both power and heat.
An experimental set-up of capacity 40 kg per batch for the calcination of gypsum has been designed and installed. The trials of the experimental set-up have been carried out using thermic oil heated by an alternate heating method. |
| Description: | National Conference Emerging trends of energy conservation in buildings Nov.01-03, 2012
CSIR-Central Building Research Institute Roorkee-247667, Uttrakhand, India. |
| URI: | http://hdl.handle.net/123456789/1250 |
| Appears in Collections: | Published Articles
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