The working fluid in ocean thermal power plant is volatile liquid like ammonia.
Ammonia is used as the working fluid in ocean thermal power plants due to its favorable thermodynamic properties. Here are the reasons why ammonia is used:
1. High latent heat of vaporization: Ammonia has a high heat of vaporization, which means it can absorb a significant amount of heat when it evaporates. This property is essential for efficient heat transfer in ocean thermal power plants.
2. Low boiling point: Ammonia has a relatively low boiling point (-33.34°C or -28°F), which allows it to evaporate at low temperatures. This is beneficial in ocean thermal power plants, where the temperature difference between warm surface water and cold deep water is not significant.
3. Non-toxic and non-flammable: Ammonia is a non-toxic and non-flammable substance, making it safe to use in power plant applications. It does not pose a risk to the environment or human health.
4. Abundant and cost-effective: Ammonia is readily available and cost-effective compared to other working fluids. Its production is well-established and widely used in various industries.
5. Environmental friendliness: Ammonia is considered an environmentally friendly option as it does not contribute to ozone depletion or global warming. It has a low global warming potential and does not contain chlorine or fluorine, which are harmful to the environment.
In conclusion, ammonia is the preferred working fluid in ocean thermal power plants due to its advantageous thermodynamic properties, safety, cost-effectiveness, and environmental friendliness.