Question

Calculate h1,h2,h3,h4 & Work turbine & Wpump from Rankine Cycle T1=5 Celisius & T2= 26.9 Celisius. ( Ammonia) is the fluid

However, Lockheed Martin a company that has paired up with The Reignwood Group to build a commercial 10 MW OTEC system which will be the largest OTEC system in operation to date [4). This will be a floating platform constructed off the coast of China where conditions are prime for an OTEC plant, which means a warm surface water temperature and a low water temperature at 1000 meters deep (4) III THEORY The closed cycle OTEC system uses Ammonia as a working fluid Ammonia has a much lower boiling point than that of water. The water on the surface of the ocean is warm enough to heat the working fluid and cause a thermodynamic cycle of a heat engine to occur [7] The condenser will also consist of deep water from the ocean. This water will be pumped from the sea floor approximately 1000 meters deep The schematic of the cycle is presented in Figure 1. Data from a buoy off the coast of Hawaii has been selected for the target OTEC plant location with optimal conditions. The average surface water temp is 26.9°C [5]. The depth at this location is 4,919 meters Water from 1000 meters deep will be approximately 5 °C. This is just above freezing and will be enough to condense the working fluid so that it can go through another cycle. Figures 2 and 3 show a better depiction of this temperature fluctuation This location and these parameters will be evaluated and mathematically analyzed. It will then be determined if the OTEC plant can produce enough power to sustain itself and provide power output. The efficiency will be examined in comparison to the Carnot efficiency and work of the pump and turbine will be examined at as well Warm Water Boile Pump Turbine Calel Water 1000m Figure 1. Schematic of OTEC System

Answer 1