Lobamba High Temperature Solar System

The operating temperature reached using this concentration technique is above 500 degrees Celsius —this amount of energy heat transfer fluid to produce steam using heat exchangers. The energy source in a high-temperature solar power plant is solar radiation. Meanwhile, a conventional thermal power plant uses fossil fuels such as coal or gas.

Thermal analyses of high-temperature solar thermal systems typically combine aspects of conduction, convection and radiation heat transfer modes. The systems rely on heat transfer media selected to match the operating temperature and heat flux ranges for specific applications. Such media serve a multi-purpose role.

Hence,high-temperature LHS can make extensive use of high-grade energy (spillage of energy from PV and wind power, Solar energy using CRS) to generate both power and heat simultaneously. The power can be generated directly from thermal energy using thermo-photovoltaic diode and can be treated as a standalone thermal battery.

It is the world's largest solar thermal plant, occupying an area of 13 square kilometers just 60 kilometers south of Las Vegas. Its three 139-meter-high towers and more than 300,000 mirrors can produce 392 MW, a clean supply equivalent to reducing 400,000 tons of CO2 annually.

There are experimental results available for melting/solidification of low or medium temperature PCM ( Motahar et al., 2017 ), ( Mehta et al., 2019 ).However, experiments are yet to be performed for high-temperature PCM like silicon. Hence, numerical study is the most preferred method to analyze high-temperature LHS system ( Kant et al., 2018 ).

The challenges faced during numerical prediction of high-temperature LHS are as follows: To model thermal stress developed due to volume change during phase transition To consider radiation heat losses due to high operating temperature Implementation of Stefan condition at phase change interface