This IEEE Seminar Topic on Biomass Supported Solar Thermal Hybrid Power Plant discuss about the use of non-renewable energy cause environmental pollution and also they gets depleted. Pollution free, freely available renewable sources are best alternative. Solar power plants are widely used but its main problem is variability. Biomass plants are also used but its fuel availability in large amount is difficult. To overcome the disadvantages of both power plants they are combined. By shared use of some of the equipments effective cost is less than simple addition. Effective operating hours and therefore overall energy generation is higher. Hence this can be considered as technology for future.
Need of solar thermal power plant is increasing due to increased fuel cost and environmental pollution. Working similar to conventional thermal power plant. Steam is generated through solar thermal energy instead of fossil fuel.
- Parabolic Trough Collector System
- Parabolic Dish Focus System
- Central Receiver System
In the above diagram we can see that how a parabolic collector focuses sunlight in to focal point. It is the most cost effective and reliable among the three. It is constructed as a long parabolic trough-shaped mirror, generally made of polished metal. Heat transfer fluid (usually oil) runs through the tube to absorb the concentrated sunlight.
Tracks the sun by rotating about two axes and rays are brought to a point focus. Receiver is placed at the focus. Working fluid in the receiver gets heated. Using this heat steam is produced. Steam drives a prime mover to generate electricity.
Solar radiation reflected from arrays of large mirrors which are called heliostats is concentrated on a receiver situated at the top of a supporting tower. A molten salt is used as working fluid and medium of thermal storage. It Collects thermal energy from sunrise. When obtained energy is insufficient stored energy is used. Hence constant electrical output is obtained. Stored energy will be depleted sooner and thereafter no energy production.
Proposed Biomass Supported STPP for Stable and Continuous Operation should have Large amount of budget will be required for building of large storage system. Biomass supported plant can contribute to generate electrical energy continuously. An auxiliary boiler is used to heat water whose fuel is provided from the biomass plant. Solar thermal power plant with an auxiliary boiler in addition an auxiliary boiler is placed. Fuel to boiler is provided from the biomass plant. Steam from the boiler is given to the turbine in case of insufficient solar radiation. Storage energy of STHPP remain almost constant throughout the day. So the electrical energy produced is stable and continuous.