Process Diagram with Summary below
PSG Process Summary
Direct Steam Generation directly from water offers a simple cycle design with fewer parasitic, heat exchanger and pumping loses and easily integrated with existing or planned solar hybrid power stations without the 400C temperature limitations of heat transfer fluid.
The PSG Technology relies on "Direct Evaporation" without the two-phase water/steam flow or boiling water in a tube. The Process utilizes thermal energy in superheated steam to create additional steam at saturation temperature which is then restored to superheat by Solar.
Conventional CSP trough solar power stations use a synthetic Heat Transfer Fluid to transfer heat from the solar field to heat exchangers in the power block to produce steam. The US Department of Energy notes on their web site poses the risks of hazardous spills, difficulty with VOC emissions permitting and requires proper handling and disposal.
The process eliminates Heat Transfer Fluid, Ledinegg Instability and results in considerable Capital and Operations savings.