Raser heat recovery projects use technology developed by power solution providers such as Pratt & Whitney and Kalina. These companies design and build some of the most respected power systems in the world. Pratt & Whitney provides skid-mounted modular  organic Rankine cycle (ORC) systems to Raser which can be implemented very quickly. In many cases, the power island is the exact modular power systems that Raser uses in its geothermal power plants.

Raser’s ambitions are justified by the competitive advantage it derives from utilizing modular skid mounted systems. The time to market is drastically reduced as compared to designing and building one-off organic Rankine cycle or steam cycle systems. All of the Raser power solutions provide zero-emissions electricity. In addition to zero emissions, the heat recovery plants utilizing Raser’s power solutions can be operated remotely. There is no requirement for steam operators and engineers.

UTC Pure-Cycle 250 kW

Pratt & Whitney

The Pratt & Whitney UTC Pure-Cycle power system is the system that Raser has employed in its first geothermal power plant known as Thermo 1. It is an organic Rankine cycle (ORC) machine using R245fa refrigerant as the working fluid. This is a skid-mounted modular system currently configured to produce a net 250 kW.

Kalina 5 MW Heat Recovery System

Kalina

Kalina is a patented thermal energy conversion technology. Based on well-established binary transfer principles, Kalina turns heat into power. It does this through employing a unique ability to control its specialized working fluid, a mixture of industrial grade ammonia and water.  Thermodynamically the Kalina technology provides efficiency gains over other technologies because the ammonia water composition can be optimized to the heat source.

The Kalina technology is currently employed in waste heat plants that use hot water from the steel manufacturing process and heat off a refractory tower in an oil refinery.