Why thermal power plant are not suitable for supplying fluctuating loads?

Main 2018 Question Answer – ELECTRICAL ENGINEERING – Thermal Plants Are Not Suitable For Supplying Fluctuating Loads. If you add more heat it takes some time for the thermal mass of the plant and the water to respond. Try boiling a small and a large pot of water to see how slow it responds.

What are two reasons why hydroelectric power is a good source of energy?

Science Center Objects

• Hydroelectricity is a renewable energy source.
• Hydroelectricity makes it feasible to utilize other renewable sources.
• Hydroelectricity promotes guaranteed energy and price stability.
• Hydroelectricity contributes to the storage of drinking water.

What are the advantages and disadvantages of hydroelectric power plant?

Hydroelectric energy is the most commonly used renewable energy source in the world….Disadvantages of Hydroelectric Energy

• Impact on Fish. To create a hydro plant, a running water source must be dammed.
• Limited Plant Locations.
• Higher initial Costs.
• Carbon and Methane Emissions.
• Susceptible to Droughts.
• Flood Risk.

What is meant by cogeneration system?

Cogeneration systems refer to energy systems that have the ability to produce two useful commodities simultaneously. A good example of cogeneration systems are combined heat and power plants, where electricity and useful heat are both produced from one plant.

On which criteria water turbines are selected for different hydro power plants?

The type of turbine selected for any given hydropower project is based on the height and speed of the incoming water – known as the hydraulic head – and the volume of water that flows known as the hydroelectric discharge. Efficiency and cost are also factors to be considered.

How effective is hydroelectric power?

Hydroelectric powerplants are the most efficient means of producing electric energy. The efficiency of today’s hydroelectric plant is about 90 percent.

What are advantages of hydroelectricity?

Advantages of Hydroelectricity: It is a clean and non-polluting source of energy. No fuel is required. Water is the source of energy, and it does not consume water.

How does hydroelectricity help the environment?

Hydropower is better for the environment than other major sources of electrical power, which use fossil fuels. Hydropower plants do not emit the waste heat and gases—common with fossil-fuel driven facilities—which are major contributors to air pollution, global warming and acid rain.

How does a cogeneration power plant work?

A fossil fuel such as oil, coal, or natural gas is burned in a giant furnace to release heat energy. The heat is used to boil water and make steam, the steam drives a turbine, the turbine drives a generator, and the generator makes electricity.

Which element of hydroelectric power plant prevents the penstock from water hammer phenomenon?

Surge tank
Surge tank is a tank at sufficient height , connected to penstock through riser pipe. It takes the rejected water and relives the penstock from excessive water hammer pressure.

How do hydroelectric power plants work?

Hydroelectric power is produced with moving water At hydropower plants water flows through a pipe, or penstock, then pushes against and turns blades in a turbine to spin a generator to produce electricity. Run-of-the-river systems, where the force of the river’s current applies pressure on a turbine.

Which turbine is used in hydroelectric power plant?

Turbines convert the energy of rushing water, steam or wind into mechanical energy to drive a generator. The generator then converts the mechanical energy into electrical energy. In hydroelectric facilities, this combination is called a generating unit….Turbines.

Propeller	up to 15 metres
Pelton	300 metres and over

How does a hydropower plant work?

The hydropower plant or hydroelectric power plant is used to convert the kinetic energy of water into electrical energy. The kinetic energy developed in the water flow due to the gravity of falling water from higher to lower head.

Why hydroelectric power plant is not suitable for constant steady load?

This type of hydroelectric power plant ,water is not available all the time. So this type of power station is not suitable for constant steady load. There is no pondage or storage facility available in such type of power plant. Plant is placed in such a area,where water is coming directly from the river or pond.

What are the different types of hydro electric power plant?

As per height of water or water head,hydro electric power plant can be divided three categories: a. Low Head b. Medium Head

What is a forebay in hydroelectric power plant?

The forebay is an optional component of a hydroelectric power plant. The reservoir is used to store water across the river. In some hydroelectric power plants, the reservoir behaves as a forebay. And the water from the reservoir leads to the turbine.