Developing solar power plant

purpose• A 1 MW solar power plant generates 8000 KWH unit of electricity per day

which can be sold at Rs 15 / unit giving an income of Rs 1.20 lakhs per day.• Additional income could come from carbon credit trading. A 1 MW plant

by generating 8000 KWH x 300 sunny days = 24,00,000 KWH which if traded for Rs 1 to another polluting steel or coal power generating company could fetch Rs 24 lakhs per annum as surplus income.

• The Government of India not only offers to purchase the electricity generated at a higher tariff but institutions like IREDA can fund up to 80% of the project cost.

• The plant has a virtually zero running cost as all it needs is sunlight. The solar panels, inverters and trackers can be expected to last between 25-35 years. Solar panel cleaning could be done either manually or with the help of automated solar panel cleaners. Some investments for plant security may be needed.

solution1)Solar panel trackers are not manufactured in India and they are at the moment being imported from China. Since we need a fairly large quantity of solar panel trackers for this 1 MW plant and other MW scale solar plants we wish to build in India a tracker manufacturing plant is needed. To create a tracker manufacturing infrastructure here in India we need funds worth Rs 25 lakhs.2) Combined solar thermal & PV development - Solar energy is converted into electricity via 2 methods : photovoltaic's & thermal. In photovoltaic's certain semiconductors when exposed to light produce an electric current. The efficiency of solar photovoltaic (PV)systems range from 14% - 36%. In solar thermal, the heat from the sun is used to heat large amounts of water which is then used to drive turbines. Efficiency of solar thermal system is around 22%. We wish to combine solar thermal & PV systems to take efficiencies to over 50%...Also, solar thermal power generation techniques are labor intensive, so more important for India which is capital scarce and labour surplus..This R&D development will need funds worth Rs 1 crore.In India, no bank funds any R&D project and since mine is a small company, despite various efforts we have been denied access to the funds.

Introduction

• A Solar Power plant produces electricity by reflecting sunlight on to the central receiver

• A solar thermal plant consists of mirror reflectors called heliostats

•

Heliostats• They direct and concentrate the

solar radiation onto a central receiver.

• Many parameters must be optimized, in the design of a solar thermal plant

• The parameters are– Location– Shading and– Blocking

•

Shading and Blocking

Shading occurs when a heliostat casts its shadow on another heliostat located behind it

• Blocking occurs when a heliostat in front of another heliostat, blocks the reflected suns energy on its way to the receiver

Components & its working•Parabolic tough shaped mirrors are the sunlight receivers, they absorb the heat and is collected in special collectors.•This heat is transferred to the central receiver through these collectors.•These parabolic receivers are in the particular angle ,which reflect towards central receiver .

Continued..

•Collectors contain panels which have thermal transfer fluid which gets heated. Almost till (400°c to 750°c ).•This liquid is pumped through a series of heat exchangers to produce super heated steam.•This stem is used to rotate turbines to produce electricity.

Implementation

Structure of 1 mw solar plant

Working of a turbine generator

Cost break upThe cost break up of the solar plant is as under -Single sun solar cells of 1 MW or 1000 KW - Rs 12.50 croreDouble axis trackers costing approx - Rs 5.00 croreGrid feed Inverters (MPPT) 250 Kw x 4 - Rs 2.00 croreSpecial UV / IR Filter cover glass - Rs 3.75 crore - helps prevent solar cell heating & ageingLand around 10-15 acres - Rs 2.50 crore - Varies greatlyPlant site development & erection - Rs 1.00 croreTotal : Rs 26.75 crore.

Thank you