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Yoonseok Jang - One of the best experts on this subject based on the ideXlab platform.
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cloud point and bubble point measurement for the poly 2 butoxyethyl acrylate cosolvent mixture and 2 butoxyethyl acrylate in supercritical fluid solvents
Journal of Chemical & Engineering Data, 2014Co-Authors: Yoonseok JangAbstract:High pressure cloud-point data were reported for poly(2-butoxyethyl acrylate) [P(2-BEA)] in Propane (c3h8), propylene (C3H6), butane (C4H10), 1-butene (C4H8), and dimethyl ether (DME) (CH3OCH3), as well as for the P(2-BEA) + 2-butoxyethyl acrylate (2-BEA) (or DME) system in supercritical CO2. Cloud-point pressures for the P(2-BEA) + C3 hydrocarbons curves were ca. 22 MPa higher than those for P(2-BEA) + C4 hydrocarbons, at a constant temperature of ca. 393 K. The cloud-point pressure for the P(2-BEA) + DME system was located between C3 and C4 hydrocarbons at pressures below ca. 20.0 MPa. The P(2-BEA) + CO2 + 0.649 and 0.680 2-BEA phase behavior curves intersect a one phase (fluid) → two phases (liquid + vapor) curve at temperatures of 353.6 K (at 24.5 MPa) and 413.4 K (at 32.3 MPa). The location of the P(2-BEA) + CO2 cloud-point curve shifts to lower temperatures and pressures upon the addition of 2-BEA or DME. Vapor–liquid phase equilibrium data at high pressures were presented for the CO2 + 2-BEA system...
Kaihua Guo - One of the best experts on this subject based on the ideXlab platform.
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vapor liquid equilibrium measurements for a tetrafluoromethane Propane system over a temperature range from 142 96 to 293 23 k
Journal of Chemical & Engineering Data, 2012Co-Authors: Yanni Liu, Kaihua GuoAbstract:The isothermal vapor–liquid equilibrium (VLE) for tetrafluoromethane (CF4) + Propane (c3h8) system was measured and P, T, and y data were collected at temperatures of (142.96, 163.07, 183.10, 203.26, 223.17, 243.12, 263.15, 283.01, and 293.23) K. A vapor recirculation method was employed to drive the mixing of the two components in the system and to quicken the equilibrium process. The experimental results were correlated with Peng–Robinson equation of state and the van der Waals two-parameters mixing rule. The mean deviations between the correlated and measured vapor compositions were found to be satisfactory within 0.01 and the data showed a good accuracy and consistency.
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a novel cryogenic power cycle for lng cold energy recovery
Energy, 2011Co-Authors: Yanni Liu, Kaihua GuoAbstract:A novel cryogenic cycle by using a binary mixture as working fluids and combined with a vapor absorption process was proposed to improve the energy recovery efficiency of an LNG (liquefied natural gas) cold power generation. The cycle was simulated with seawater as the heat source and LNG as the heat sink, and the optimization of the power generated per unit LNG was performed. Tetrafluoromethane (CF4) and Propane (c3h8) were employed as the working fluids. The effects of the working fluid composition, the recirculation rate of the c3h8-rich solution and the turbine intermediate pressure were investigated. In the cryogenic absorber, the c3h8-rich liquid absorbs the CF4-rich vapor so that the mixture exhausting from the turbine can be fully condensed at a reduced pressure. This reduction of turbine back pressure can considerably improve the cycle efficiency. The presented cycle was compared with the c3h8 ORC (organic Rankine cycle), to show such performance improvement. It is found that the novel cycle is considerably superior to the ORC. The efficiency is increased by 66.3% and the optimized LNG recovery temperature is around −60 °C.
Dimas, Ageng K - One of the best experts on this subject based on the ideXlab platform.
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OPTIMALISASI PROSES BONGKAR MUAT Propane(c3h8) DAN BUTANE(C4H10) DIKAPAL JENIS FULLY PRESSURES LPG/C GAS KALIMANTAN
2019Co-Authors: Dimas, Ageng KAbstract:ABSTRAKSI DIMAS AGENG K , 2019, NIT : 51145146 N “Optimalisasi Proses Bongkar Muat Propane(c3h8) Dan Butane(C4H10) Dikapal Jenis Fully Pressures LPG/C GAS KALIMANTAN”Program DVI, Politeknik Ilmu Pelayaran Semarang, Pembimbing : (I) Capt.I Kadek Laju, SH, MM (II) Darul Prayoga, M.Pd Muatan LPG berupa Propane (c3h8) dan Butane (C4H10) sebagai muatan yang mempunyai karakteristik khusus karena sifatnya yang sangat mudah terbakar. Penanganan muatan inipun sangat berbeda dengan muatan yang lain karena harus disimpan pada suhu yang sangat dekat dengan titik didihnya yang mana sekitar -50o C. Penulis mengangkat rumusan masalah sebagai berikut: 1) Faktor-faktor apakah yang menyebabkan keterlambatan proses bongkar muat Propane (c3h8) dan Butane (C4H10) dikapal LPG/C GAS KALIMANTAN . 2) Upaya yang dilakukan untuk mengatasi proses bongkar muat. Penulisan skripsi ini menjabarkan tentang proses bongkar muat LPG yang digunakan dalam pembuatan laporan penelitian dan sebagai landasan untuk memecahkan masalah yang ada dalam proses penelitian utamanya terkait dengan hal-hal yang menyebabkan keterlambatan proses bongkar muat, pengertian cooling down, pengertian reliquefaction plant dan pentingnya menjaga tekanan tangki saat pemuatan LPG. Metode penelitian yang digunakan oleh penulis di dalam menyampaikan masalah adalah deskriptif kualitatif untuk menggambarkan dan menguraikan objek yang diteliti. Berdasarkan cara memperolehnya, data yang diperoleh selama penelitian sebagai pendukung tersusunnya penulisan skripsi ini adalah menggunakan data primer dan sekunder. Berdasarkan hasil penelitian yang dilakukan penulis selama praktek laut di kapal LPG/C GAS KALIMANTAN mengenai proses bongkar muat LPG berupa Propane (c3h8) dan butane (C4H10) di kapal LPG/C GAS KALIMANTAN ditemukan adanya masalah-masalah dalam kegiatan pemuatan LPG dan pembongkaran LPG yaitu terdapat kru kapal yang kurang paham mengenai prosedur bongkar muat, tingginya tekanan tangki saat akan memuat, dan kesalahan koordinasi dengan port control saat bongkar muat. Pentingnya menjaga tekanan di tangki selama proses pemuatan untuk menghindari kehilanagn muatan dan bahaya ledakan. Dalam hal ini disimpulkan bahwa kurangnya pemahaman kru kapal tentang proses bongkar muat, terbatasnya waktu untuk persiapan tangki muat, dan kurangnya koordinasi dengan port control adalah penyebab masih terjadinya keterlambatan proses bongkar muat di kapal LPG/C GAS KALIMANTAN serta peningkatan tekanan tangki saat pemuatan dapat menyebabkan kehilangan muatan dan bahaya ledakan kapal. ABSTRACT DIMAS AGENG K , 2019 , NIT : 51145146 N " Optimization of Propane (c3h8) And Butane (C4H10) Loading and Unloading Process in Type of Fully Pressures LPG / C GAS KALIMANTAN”, D IV progame, Merchant Marine Polytechnic Semarang.Advisor: ( I) Capt. I Kadek Laju, SH , M.M ( II ) Mr. Darul Prayoga , M.Pd LPG cargo in the form Propane ( c3h8 ) and Butane ( C4H10 ) as a charge that has special characteristics because it is highly flammable. Cargo handling charge even this is very different from the others because it must be stored at temperatures close to the boiling point where about -50º C. The authors raised the formulation of the problem as follows : 1 ). Factors that cause delays in the loading and unloading process of Propane (c3h8) and Butane (C4H10) in shipments of LPG / C GAS KALIMANTAN. 2 ). Efforts are made to overcome the loading and unloading process. This thesis describes the process of loading and unloading of LPG used in the manufacture of the research report and as a basis for solving the existing problems in the research process mainly related to the things that cause delays in the process of loading and unloading, the sense of cooling down, the sense reliquefaction plant and the importance of maintaining the pressure when loading LPG tank. The method used by the author in delivering qualitative descriptive matter is to illustrate and describe the object under study. Based on how to obtain it, the data obtained during the study as supporting the drafting of this paper is to use primary and secondary data. Based on the results of research by the author during the practice of the sea in ships LPG/C GAS KALIMANTAN about the process of loading and unloading of LPG in the form of Propane (c3h8) and butane (C4H10) in the vessel LPG/C GAS KALIMANTAN find any problems in the activities of loading LPG and LPG demolition ie there is a crew who do not understand about the procedure of loading and unloading, high pressure when the tank will load , and coordination with port control errors when loading and unloading. The importance of maintaining the pressure in the tank during the loading process to avoid kehilanagn charge and explosion hazard. In this case concluded that the lack of understanding of the crew of the loading and unloading process, lack of time for preparation and unloading tank, and a lack of coordination with the port control is still the cause of the delay in the process of loading and unloading in the vessel LPG/C GAS KALIMANTAN as well as an increase in the pressure tank when loading can cause loss of cargo and ship explosion hazard
Ageng K Dimas - One of the best experts on this subject based on the ideXlab platform.
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optimalisasi proses bongkar muat Propane c3h8 dan butane c4h10 dikapal jenis fully pressures lpg c gas kalimantan
2019Co-Authors: Ageng K DimasAbstract:ABSTRAKSI DIMAS AGENG K , 2019, NIT : 51145146 N “Optimalisasi Proses Bongkar Muat Propane(c3h8) Dan Butane(C4H10) Dikapal Jenis Fully Pressures LPG/C GAS KALIMANTAN”Program DVI, Politeknik Ilmu Pelayaran Semarang, Pembimbing : (I) Capt.I Kadek Laju, SH, MM (II) Darul Prayoga, M.Pd Muatan LPG berupa Propane (c3h8) dan Butane (C4H10) sebagai muatan yang mempunyai karakteristik khusus karena sifatnya yang sangat mudah terbakar. Penanganan muatan inipun sangat berbeda dengan muatan yang lain karena harus disimpan pada suhu yang sangat dekat dengan titik didihnya yang mana sekitar -50o C. Penulis mengangkat rumusan masalah sebagai berikut: 1) Faktor-faktor apakah yang menyebabkan keterlambatan proses bongkar muat Propane (c3h8) dan Butane (C4H10) dikapal LPG/C GAS KALIMANTAN . 2) Upaya yang dilakukan untuk mengatasi proses bongkar muat. Penulisan skripsi ini menjabarkan tentang proses bongkar muat LPG yang digunakan dalam pembuatan laporan penelitian dan sebagai landasan untuk memecahkan masalah yang ada dalam proses penelitian utamanya terkait dengan hal-hal yang menyebabkan keterlambatan proses bongkar muat, pengertian cooling down, pengertian reliquefaction plant dan pentingnya menjaga tekanan tangki saat pemuatan LPG. Metode penelitian yang digunakan oleh penulis di dalam menyampaikan masalah adalah deskriptif kualitatif untuk menggambarkan dan menguraikan objek yang diteliti. Berdasarkan cara memperolehnya, data yang diperoleh selama penelitian sebagai pendukung tersusunnya penulisan skripsi ini adalah menggunakan data primer dan sekunder. Berdasarkan hasil penelitian yang dilakukan penulis selama praktek laut di kapal LPG/C GAS KALIMANTAN mengenai proses bongkar muat LPG berupa Propane (c3h8) dan butane (C4H10) di kapal LPG/C GAS KALIMANTAN ditemukan adanya masalah-masalah dalam kegiatan pemuatan LPG dan pembongkaran LPG yaitu terdapat kru kapal yang kurang paham mengenai prosedur bongkar muat, tingginya tekanan tangki saat akan memuat, dan kesalahan koordinasi dengan port control saat bongkar muat. Pentingnya menjaga tekanan di tangki selama proses pemuatan untuk menghindari kehilanagn muatan dan bahaya ledakan. Dalam hal ini disimpulkan bahwa kurangnya pemahaman kru kapal tentang proses bongkar muat, terbatasnya waktu untuk persiapan tangki muat, dan kurangnya koordinasi dengan port control adalah penyebab masih terjadinya keterlambatan proses bongkar muat di kapal LPG/C GAS KALIMANTAN serta peningkatan tekanan tangki saat pemuatan dapat menyebabkan kehilangan muatan dan bahaya ledakan kapal. ABSTRACT DIMAS AGENG K , 2019 , NIT : 51145146 N " Optimization of Propane (c3h8) And Butane (C4H10) Loading and Unloading Process in Type of Fully Pressures LPG / C GAS KALIMANTAN”, D IV progame, Merchant Marine Polytechnic Semarang.Advisor: ( I) Capt. I Kadek Laju, SH , M.M ( II ) Mr. Darul Prayoga , M.Pd LPG cargo in the form Propane ( c3h8 ) and Butane ( C4H10 ) as a charge that has special characteristics because it is highly flammable. Cargo handling charge even this is very different from the others because it must be stored at temperatures close to the boiling point where about -50o C. The authors raised the formulation of the problem as follows : 1 ). Factors that cause delays in the loading and unloading process of Propane (c3h8) and Butane (C4H10) in shipments of LPG / C GAS KALIMANTAN. 2 ). Efforts are made to overcome the loading and unloading process. This thesis describes the process of loading and unloading of LPG used in the manufacture of the research report and as a basis for solving the existing problems in the research process mainly related to the things that cause delays in the process of loading and unloading, the sense of cooling down, the sense reliquefaction plant and the importance of maintaining the pressure when loading LPG tank. The method used by the author in delivering qualitative descriptive matter is to illustrate and describe the object under study. Based on how to obtain it, the data obtained during the study as supporting the drafting of this paper is to use primary and secondary data. Based on the results of research by the author during the practice of the sea in ships LPG/C GAS KALIMANTAN about the process of loading and unloading of LPG in the form of Propane (c3h8) and butane (C4H10) in the vessel LPG/C GAS KALIMANTAN find any problems in the activities of loading LPG and LPG demolition ie there is a crew who do not understand about the procedure of loading and unloading, high pressure when the tank will load , and coordination with port control errors when loading and unloading. The importance of maintaining the pressure in the tank during the loading process to avoid kehilanagn charge and explosion hazard. In this case concluded that the lack of understanding of the crew of the loading and unloading process, lack of time for preparation and unloading tank, and a lack of coordination with the port control is still the cause of the delay in the process of loading and unloading in the vessel LPG/C GAS KALIMANTAN as well as an increase in the pressure tank when loading can cause loss of cargo and ship explosion hazard.
Yanni Liu - One of the best experts on this subject based on the ideXlab platform.
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vapor liquid equilibrium measurements for a tetrafluoromethane Propane system over a temperature range from 142 96 to 293 23 k
Journal of Chemical & Engineering Data, 2012Co-Authors: Yanni Liu, Kaihua GuoAbstract:The isothermal vapor–liquid equilibrium (VLE) for tetrafluoromethane (CF4) + Propane (c3h8) system was measured and P, T, and y data were collected at temperatures of (142.96, 163.07, 183.10, 203.26, 223.17, 243.12, 263.15, 283.01, and 293.23) K. A vapor recirculation method was employed to drive the mixing of the two components in the system and to quicken the equilibrium process. The experimental results were correlated with Peng–Robinson equation of state and the van der Waals two-parameters mixing rule. The mean deviations between the correlated and measured vapor compositions were found to be satisfactory within 0.01 and the data showed a good accuracy and consistency.
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a novel cryogenic power cycle for lng cold energy recovery
Energy, 2011Co-Authors: Yanni Liu, Kaihua GuoAbstract:A novel cryogenic cycle by using a binary mixture as working fluids and combined with a vapor absorption process was proposed to improve the energy recovery efficiency of an LNG (liquefied natural gas) cold power generation. The cycle was simulated with seawater as the heat source and LNG as the heat sink, and the optimization of the power generated per unit LNG was performed. Tetrafluoromethane (CF4) and Propane (c3h8) were employed as the working fluids. The effects of the working fluid composition, the recirculation rate of the c3h8-rich solution and the turbine intermediate pressure were investigated. In the cryogenic absorber, the c3h8-rich liquid absorbs the CF4-rich vapor so that the mixture exhausting from the turbine can be fully condensed at a reduced pressure. This reduction of turbine back pressure can considerably improve the cycle efficiency. The presented cycle was compared with the c3h8 ORC (organic Rankine cycle), to show such performance improvement. It is found that the novel cycle is considerably superior to the ORC. The efficiency is increased by 66.3% and the optimized LNG recovery temperature is around −60 °C.
