Biomass Supported Solar Thermal Hybrid Power Plant

This IEEE Seminar Topic on Biomass Supported Solar Thermal Hybrid Power Plant

discusses 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.

Methodologies Used

Parabolic Trough Collector System

Parabolic Dish Focus System

Central Receiver System

Parabolic Trough

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.

Parabolic Dish

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.

 

Central Receiver System

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 Solution

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.