... it could be the pressure of steam, electricity, coal, oil, natural gas, LPG and other combustible materials.6. ... steam, or steam + electricity, or any kinds of fuel (diesel, natural gas, liquefied petroleum gas or ... specification equipment, the thermal efficiency of our design is normally around 37 - 50%, i.e., around 2. ... 0-2.7kg of steam to evaporate 1 ...