Waste Heat Recovery

WHRS on Gas Turbine

TESPL offers Waste Heat Recovery Power Plants (WHRPP) and Waste Heat Recovery Systems (WHRS) on Gas Turbine exhaust gases. Waste heat from exhaust gases is recovered to generate steam/Hot oil which in turn is used to generate electric power. The options available for power generation include Steam Rankine Cycle and Organic Rankine Cycle (ORC) depending on the temperature of the heat source. Apart from WHRPP for generating power, TESPL also has experience in designing customized solutions of WHRS on Gas Turbine to generate other forms of energy for process applications, such as steam, thermal oil, hot water, refrigeration etc..

Applications

Large amount of heat energy is rejected to the atmosphere through exhaust gases. The heat energy rejected to the atmosphere is to the tune of 60% of the fuel combusted in the gas turbine. Therefore, the WHRPP and WHRS on Gas Turbine exhaust gases becomes economically viable.

This waste heat can be converted in to following useful forms by installing WHRS:-

• Steam / Thermic fluid (hot oil)/ Hot water for process use
• Generation of electricity through Steam Rankine Cycle power plant
• Generation of electricity through Organic Rankine Cycle power plant
• Chilling up to +6 °C
• Refrigeration up to -60 °C
• Waste water Recycling
• Different Drying applications in Process

Reference installations

TESPL has had many successful installations in operation for many years. One of the pioneering and path breaking projects of WHRS on Gas Turbines executed by TESPL is a quintuple generation plant using the gas turbine in cogeneration cycle. This WHRS on Gas Turbine is a process integrated cogeneration project generating five different forms of energy from single heat source i.e. Electricity, Thermal Oil for process, Chilling, Steam for waste water recycling (including Spray drying for Zero liquid discharge).

Salient Features

• Customized Process integrated systems
• WHRS on Gas Turbine reduces energy cost and improves productivity.
• Modularized construction to reduce installation time.
• Fully automatic bypass system ensures safety of GT in case of abrupt shutdowns.
• State-of-the-art instrumentation and controls for easy operation and maintenance.
• Reduces Energy cost and improves productivity.
• Waste heat from multiple GTs can be combined to install a common WHRPP.
• Air cooled systems could be offered to save water.
• Reduces CO2 Emission and earns Carbon Credits.
• Supports sustainable development initiatives.
• Lowest payback periods & highest life cycle earnings.
• No adverse effect on GT operation as the WHRS operates much below back pressure allowance on the exhaust side.