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3. RESUL TS 22nd International Congress of Mechanical Engineering (COBEM 2013) November 3-7, 2013, Ribeirão Preto, SP, Brazil After the implementation of the mathematical model for each working fluid in the ESS to the considerations mentioned previously, it was the change in pressure in the boiler and condenser in order to obtain maximum specific power output from the OTEC plant for each working fluid. The boiler pressure oscillated between 500 kPa to 700 kPa at intervals of 10 kPa and the condenser pressure oscillated from 390 kPa to 590 kPa also at intervals of 10 kPa. Using the obtained results, was generated a table with the values of specific power for each pair of pressures. In order to facilitate the visualization of the results obtained, the data were exported to Excel to obtain a surface graph. Thus, were obtained four graphs relating the boiler pressure, the condenser pressure and the specific power. The Fig. (2) represents the surface graph for the working fluid R-12. To the conditions imposed, the maximum 2 specific power output was 137,8 W/m with the operating pressure system of 700 kPa in the boiler and 440 kPa in the condenser. ISSN 2176-5480 Figure 2. Behavior of specific power for the working fluid R-12. The Fig. (3) represents the surface graph for the working fluid R-134a. For the conditions imposed, the maximum 2 specific power output was 134,1 W/m with the operating pressure system of 700 kPa in the boiler and 440 kPa in the condenser. Figure 3. Behavior of specific power for the working fluid R134a. 604PDF Image | PERFORMANCE ANALYSIS OF FLUIDS R12, R152A, R134A AND R500 FOR AN ORGANIC RANKINE CYCLE USED IN AN OTEC POWER PLANT
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