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Table 2 Solar Collector Design Specification Advances in Engineering Research, volume 190 Tube length Box length Box Width Box Height Distance Between Tubes Inside Diameter Outside Diameter Solar Collector 9,4 m 1128 mm 1000 mm 115 mm 110 mm 8,525 mm 9,525 mm Experiment Design Organic Rankine cycle system with solar collector as source energy is show in figure 5. Figure 5. Organic rankine cycle system with solar collector Inside Solar Collector the initial temperature of the water on the evaporator is 27 ̊C then the water pump is turned on and then silenced, the data is taken from 11 am – 1 pm based on the test data the water temperature increases and has the highest temperature at 52.3 ̊C, this temperature does not reach the desired temperature of 95 ̊C, because at the time of designing, the weather conditions were normal, but at the time of the experiment the weather conditions were not very supportive, therefore, to reach the desired temperature a heater was used during the experiment. this heater will later be connected to the control temperature to be able to control the desired temperature. It is known from the calculation that at a temperature of 95oC, the solar collector is able to contribute an energy of 37.13% of the total energy needed, so that the energy that can be saved or renewable energy sources is 37.13% of the total heat available in the heat source. Table 3 Comparison of Energy Analysis between Design and Experiment Figure 6. Comparison of Experiment and Design It can be seen in table 3 and figure 6 the difference between the results of design and experiment. The efficiency obtained in the experiment is 4.3% and this is different from the efficiency of the ORC system that is designed at 6.65%, this is due to the difference in temperature between design and experiment. The evaporation temperature in the evaporator in the design is higher than the evaporation temperature in the evaporator in the experiment, it causes the efficiency in the design results is higher than the efficiency in the experiment. This is because the turbine operating conditions in the design are higher than the turbine operating conditions in the experiment, this is also in accordance with research conducted by Wei Liu in which if the temperature is lower in the pump area and the higher temperature in the turbine area will improve the performance of the ORC system [13]. VII. CONCLUSION Design and manufacturing of Organic Rankine Cycle (ORC) with solar collector as energy source, has been carried out and resulted in the length of the evaporator tube is 14.5 m, length of condenser is 13.9 m and the length of solar collector tube is 9.4 m. The helical Diameter of evaporator and condenser are 250 mm, and the high of helical evaporator 290 mm and condenser 280 mm. Organic Rankine cycle system is designed to produced 534.4 Watt, but when the experiment is carried out the system generates energy of 305 Watt with the efficiency of 4.30%. ACKNOWLEDGMENT The author is very grateful for the financial support provided by University of Riau Under “SKIM Unggulan Universitas Tahun Anggaran 2019 (No.955/UN. 19.5.1.3/PT.01.03/2019)” with a title “Design And Manufacturing Of Organic Rankine Cycle (ORC) System Using R-134a As Working Fluid And Solar Collector As Source Energy”. REFERENCES [1] Aboelwafa, Omar, Seif-Eddeen K.Fateen, Ahmed Soliman, Ibrahim M.Ismail. 2017. “A Review On Solar Rankine Cycles: Working fluids, Applications, And Cycle Modifications”. Renewable and Sustainable Energy Reviews. 82 (2018) 868–885. [2] IEA (2014), Energy Technology Perspectives 2014, IEA, Paris, [3] Kabir, Ehsanul, Pawan Kumar, Sandeep Kumar, Adedeji A. Adelodun, Ki-Hyun Kim. 2018. “Solar Energy: Potential And Future Mass Flow Rate Turbine Power Pump Power Heat in Net Work System Efficiency Design 0,034 kg/s 0,560 kJ/s 0,027 kJ/s 236,1 kJ/kg 0,5344 kJ/s 6,65 % Experiment 0,035 kg/s 0,578 kJ/s 0,273 kJ/s 202 kJ/kg 0,305 kJ/s 4,30 % There is a difference between design and experiment because in the design all conditions are stable, little energy loss, little flow loss, stable working temperature, but when the experiment is very difficult to keep the working temperature stable due to a fairly large loss of energy. 42PDF Image | Solar R134A ORC organic rankine cycle
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