An evaporative-cooling condensation type ammonia refrigeration unit with leaked ammonia gas removing means is provided. Recovery of a leaked ammonia gas is conducted taking advantage of a high solubility of ammonia in water, wherein the leaked ammonia gas is dissolved in a cooling water used for an evaporative condenser. The construction of the unit is characterized by including an ammonia absorptive structure in a gas/liquid countercurrent mode provided in a space on the lower side of the evaporative condenser accommodated in an upper chamber.
An integrated steam-ammonia power cycle is disclosed which achieves a close match to a glide heat source such as exhaust from a gas turbine, and which also eliminates sub-atmospheric pressure operation. With reference to FIG. 1, the exhaust heats in sequence steam superheater 107; steam boiler 105; feedwater preheater 104 plus ammonia superheater 103; and ammonia preheater 102. Steam is expanded to at least 17 psia in turbine 108, then condensed to boil ammonia in boiler 110. Superheated ammonia is expanded in turbine 112, and condensed in condenser 114. Feed ammonia is preheated in at least two parallel preheaters.
A closed circuit cooling tower for evaporative fluid cooler applications such as water-cooled residential and commercial air conditioning, geothermal cooling supplementation, and process cooling applications. Corrugated metal tubes are used for heat transfer to permit mechanical de-fouling, such as flexing the tubes. The cooling tower may operate at high dissolved solids, or gray water may be used in order to reduce water consumption. The cooling tower is lightweight and modular to permit retrofitting of existing rooftop air conditioning systems so that efficient evaporative cooling may be used to lower energy costs.
