The installation time for a gas turbine power plant is

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Option A: Comparatively less than thermal power plant

Explanation & Concepts:
Gas turbine power plants require significantly less installation time compared to thermal (coal-fired) power plants because they consist of compact, modular components. Thermal power plants require large-scale civil works, massive steam generators, and complex boiler setups that lead to much longer construction and commissioning periods.

Working Principle: The principle relies on the Brayton Cycle where air is compressed, heated, and expanded through a turbine. Because there is no need for large steam boilers, cooling towers, or extensive coal handling units, the site preparation and installation are modular and rapid.

Key Formulas: $W_{net} = W_{turbine} - W_{compressor}$ — Net work output of a gas turbine; $\eta_{th} = 1 - \frac{1}{(r_p)^{\frac{\gamma-1}{\gamma}}}$ — Thermal efficiency based on pressure ratio

Key Points: Gas turbine plants are ideal for peak load duty.; Thermal plants are typically used for base load duty due to their large size and slow startup.; Civil engineering requirements for gas turbines are minimal compared to the elaborate foundations required for heavy thermal power equipment.

Advantages: Lower capital investment; Quick start-up and shutdown time; Low maintenance cost; Small floor area required

Disadvantages: Lower overall thermal efficiency; High running cost due to expensive fuel (natural gas/distillate oil); Short life span of turbine blades due to high operating temperatures

Applications: Peak load power generation; Standby power units; Industrial captive power plants

Additional Info: Thermal power plants involve complex logistics including coal transport networks and water supply systems.. Option B, C, and D are incorrect because they ignore the compact and modular nature of gas turbine systems compared to the massive scale of steam-based thermal plants.

Answer: A is correct — The modular design of gas turbine plants allows for much faster installation and commissioning than large-scale coal-fired thermal power plants.

Exam Tip: Always relate plant installation time to the complexity of the heat source; coal-fired thermal plants are complex because they require extensive boilers and steam-cycle infrastructure.

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Option B: Comparatively more than thermal power plant

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Option C: Equal to thermal power plant

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Option D: Very much longer than thermal power plant

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