Table of Contents
- 1 Why is water considered to be a good coolant?
- 2 Why is water used as a coolant in nuclear reactor?
- 3 Why does water have a high heat capacity?
- 4 Why water is not used as a coolant in fast breeder reactor?
- 5 Why is water having a higher specific heat capacity than sand?
- 6 What is specific heat capacity of water?
- 7 Which is used as coolant in fast breeder reactor?
- 8 Why does water have a high specific heat capacity?
- 9 How is heat pollution classified as a water pollutant?
- 10 What is specific heat?
Why is water considered to be a good coolant?
Water is the most common coolant. Its high heat capacity and low cost makes it a suitable heat-transfer medium. It is usually used with additives, like corrosion inhibitors and antifreeze.
Why is water used as a coolant in nuclear reactor?
The most common types of nuclear power plants use water for cooling in two ways: To convey heat from the reactor core to the steam turbines. To remove and dump surplus heat from this steam circuit.
Why does water have a higher specific heat than metal?
Water has a higher specific heat capacity because it has less of a tendency to change in temperature. What this signifies is that more energy is required to increase the temperature of the water.
Why does water have a high heat capacity?
Water’s high heat capacity is a property caused by hydrogen bonding among water molecules. When heat is absorbed, hydrogen bonds are broken and water molecules can move freely. When the temperature of water decreases, the hydrogen bonds are formed and release a considerable amount of energy.
Why water is not used as a coolant in fast breeder reactor?
This makes it difficult to use water as a coolant for a fast reactor because the water tends to slow (moderate) the fast neutrons into thermal neutrons (although concepts for reduced moderation water reactors exist).
Why water is not used as coolant in fast breeder?
At this concentration of U-235, the cross-section for fission with fast neutrons is sufficient to sustain the chain-reaction. Using water as coolant would slow down the neutrons, but the use of liquid sodium avoids that moderation and provides a very efficient heat transfer medium.
Why is water having a higher specific heat capacity than sand?
Because water has a high heat capacity, it requires more energy to raise the temperature by one degree. The sun puts out a more or less constant rate of energy, which heats up sand more quickly and water more slowly. Sand has a much lower specific heat than water—that’s why it gets hot so fast!
What is specific heat capacity of water?
The SI unit of specific heat capacity is joule per kelvin per kilogram, J⋅kg−1⋅K−1. For example, the heat required to raise the temperature of 1 kg of water by 1 K is 4184 joules, so the specific heat capacity of water is 4184 J⋅kg−1⋅K−1. …
What is a fast breeder reactor explain?
A Fast Breeder Reactor (FBR) is a nuclear reactor that uses fast neutron to generate more nuclear fuels than they consume while generating power, dramatically enhancing the efficiency of the use of resources. Nuclear fission by fast neutron causes the increase in neutrons generated.
Which is used as coolant in fast breeder reactor?
A liquid metal fast breeder reactor is so named because during conversion of the fertile material into fissile material use is made of high-energy (“fast”) neutrons and the coolant employed is sodium, which remains in the liquid state (“liquid metal”) at the prevailing high working temperatures.
Why does water have a high specific heat capacity?
Some substances heat up quickly, while other substances heat up slowly. Water is one of the latter—it has a high specific heat capacity because it requires more energy to raise the temperature. Water has a specific heat capacity of 4182 J/kg°C.
What does a high heat capacity mean in chemistry?
A high heat capacity means that a substance can absorb a lot of heat before registering a change in temperature—think about how long it takes for a pot to get warm to the touch on the stove versus how long it takes the water inside to get warm. That means that water has a higher heat capacity—it can store more heat before changing in temperature.
How is heat pollution classified as a water pollutant?
Heat is classified as a water pollutant when it is caused by heated industrial effluents or from anthropogenic (human) alterations of stream bank vegetation that increase the water system temperatures due to solar radiation. A common cause of thermal pollution is the use of water as a coolant by power plants and industrial manufacturers.
What is specific heat?
Specific heat is a measure of heat capacity, or how much heat a material can store when changing temperature.