Arya Khairullah Akbar, . (2024) EXERGY DAN EFISIENSI TERMAL PADA SISTEM KAPAL HZ LNG CARRIER TERHADAP VARIASI SUHU DAN TEKANAN FLUIDA KERJA KARBON DIOKSIDA, R290, DAN R717. Skripsi thesis, Universitas Pembangunan Nasional Veteran Jakarta.
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Abstract
Combined gas turbine cycle and carbon dioxide cascade technology is a system used to produce propulsion and electricity on ships with high efficiency and good performance. It involves the use of two main stages, namely a gas turbine and a steam turbine, to meet the power requirements of the ship. The combined gas turbine cycle and carbon dioxide cascade technology is predicted to be able to overcome the environmental impacts resulting from the use of fossil fuels, fluctuations in fuel oil prices, and the relatively low level of efficiency in the use of fuel oil. This research focuses on 2 objectives, namely thermal efficiency and exergy efficiency of this system. In this research, there are 4 working loops, but it focuses on calculations in only 3 loops, namely loops 1, 2, and 3. Variations in the research include temperature variations, pressure variations, and working fluid variations. There are 5 different variations for temperature and pressure depending on the engine components in each loop. The working fluid has 3 variations, namely CO2, R290, and R717. The research results reveal that for loop 1 the highest turbine work value is 43 kJ/kg at a temperature of 403K, the turbine work in loop 2 is highest at 124 kJ/kg at a temperature of 360K on R717 fluid, in loop 3, the highest turbine work value is 48.4 kJ/kg at a temperature of 340K in R717 fluid. For the heat inlet value in loop 1, the highest heat inlet value is 85 kJ/kg at a temperature of 403K, the highest heat inlet value in loop 2 is 133.3 kJ/kg at a temperature of 360K in R717 fluid. In loop 3 the highest heat inlet value is 95.6 kJ/kg at a temperature of 340K in R717 fluid. The highest thermal efficiency value for loop 1 is 39% at a temperature of 403K, the highest thermal efficiency for loop 2 is 64% at a temperature of 360K on R290 fluid and R717 fluid, for loop 3 the highest value is 43% at a temperature of 329K on CO2 fluid, the overall thermal efficiency results show the largest figure, namely 45% at a temperature of 403K for R717 fluid. Exergy efficiency has the highest value at 56% at a temperature of 403K which is at the highest temperature for the R290 fluid. It can be concluded that R717 fluid is the producer of the highest thermal efficiency value in the entire loop and R290 fluid is the producer of the highest exergy efficiency value. Thus, this research can provide an understanding of the effects of using combined gas turbine cycle and carbon dioxide cascade technology coupled with variations in temperature, pressure and working fluid in a system on a ship. It is hoped that this research can contribute to the development of alternative technology to reduce the use of fossil fuels. Keywords: combined gas turbine cycle; cascade; efficiency
| Item Type: | Thesis (Skripsi) |
|---|---|
| Additional Information: | [No. Panggil: 2010313036] [Pembimbing: Fathin M. Mahdhudhu] [Penguji 1: Fakhri Akbar Ayub,] [Penguji 2: Purwo Joko Suranto] |
| Uncontrolled Keywords: | combined gas turbine cycle; cascade; efficiency |
| Subjects: | T Technology > TC Hydraulic engineering. Ocean engineering T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Fakultas Teknik > Program Studi Teknik Perkapalan (S1) |
| Depositing User: | ARYA KHAIRULLAH AKBAR |
| Date Deposited: | 30 Jul 2024 06:56 |
| Last Modified: | 30 Jul 2024 06:56 |
| URI: | http://repository.upnvj.ac.id/id/eprint/31502 |
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