Electric power generator Closed-cycle system Ammonia vapor. Turbi Warm water Evaporator outlet Condenser a water water outlet 25℃ mp Ammonia liquid Cold intake 5'C Figure 5.9 An OTEC heat engine using ammonia as a working fluid. The turbine is driven by the ammonia vapor and is connected to a generator to produce electricity The warm water is drawn from the ocean surface the cold water from a depth of 1000 meters.(Source: Figure supplied by the National Renewable Energy Laboratory) 复旦大学环境科学与工程系 Department of Environmental Science and Engineering, Fudan UniversityFigure 5.9 An OTEC heat engine using ammonia as a working fluid. The turbine is driven by the ammonia vapor and is connected to a generator to produce electricity. The warm water is drawn from the ocean surface; the cold water from a depth of 1000 meters. (Source: Figure supplied by the National Renewable Energy Laboratory.) Closed-cycle system