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Ditemukan 18 dokumen yang sesuai dengan query
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Boyen, John L.,
New York: Wiley, 1980
621.402 BOY t (1)
Buku Teks  Universitas Indonesia Library
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Kresnandar
Abstrak :
[ABSTRAK
Penelitian ini membahas tentang model konfigurasi HRSG (Heat Recovery Steam Generation) pada PLTGU (Pembangkit Listrik Tenaga Gas Uap). Dari model konfigurasi HRSG, diperoleh perbandingan nilai efisiensi termal, kapasitas daya, LCOE (Levelized Cost of Electricity) dan nilai keekonomian dengan pendekatan NPV (Net Present Value), IRR (Internal Rate of Return), PBP (Pay Back Period) dan sensitivitas keekonomian dari setiap model konfigurasi HRSG. Pengaruh tingkat tekanan HRSG 1P (one pressure), 2P (two pressure), dan 3P (three pressure) terhadap temperatur keluar turbin gas, analisi ekonomi dari perbandingan HRSG 2P, 3P, dan 3PHR (three pressure with reheater), dan analisis irrevesibel untuk tiga tekanan HRSG dengan pemanasan kembali dan pendinginan udara turbin gas pada PLTGU sudah diteliti. Pada penelitian ini, model konfigurasi HRSG yang dibandingkan antara lain; model konfigurasi HRSG, 1PRH, 2PRH, dan 3PRH. Model konfigurasi HRSG pada PLTGU disimulasikan dengan GateCycle Ver 6.0.0.2 dengan menggunakan turbin gas siemen V94.2. Hasil penelitian yang diperoleh antara lain; model konfigurasi HRSG 3PRH memiliki nilai efisiensi termal 5,59% lebih besar daripada model konfigurasi HRSG 1PRH dan 0,66% lebih besar daripada model konfigurasi HRSG 2PRH, model konfigurasi HRSG mempengaruhi nilai NPV, semakin besar nilai efisiensi termal dan kapasitas daya pembangkit listrik maka nilai NPV akan semakin besar, model konfigurasi HRSG 1PRH dengan interest rate 8.4% mempunyai PBP selama 8 tahun, sedangkan model konfigurasi HRSG 2PRH dan 3PRH mempunyai PBP selama 7 tahun, dan nilai tukar mata uang dan harga bahan bakar memiliki nilai sensitivitas yang tinggi terhadap nilai keekonomian apabila dibandingkan dengan nilai suku bunga bank dan biaya investasi.
ABSTRACT This paper presents HRSG (heat recovery steam generation) configuration models on CCGT (Combined Cycle Power Generation). In order to get the comparison of thermal efficiency, power capacity, LCOE (Levelized Cost of Electricity) and the economic value with approach NPV (Net Present Value), IRR (Internal Rate of Return), PBP (Pay Back Period), and economic sensitivity of each HRSG configuration models. The influence of the HRSG 1P (one pressure), 2P (two pressure) and 3P (three pressure) with the exit turbine gas temperature, the economic analysis of the comparison HRSG 2P, 3P, and 3PHR (three pressure with reheater), and irrevesibel analysis of the three-pressure HRSG with reheating and cooling air to the gas turbine on CCGT have been investigated. In this paper, HRSG configuration models which is compared such as; configuration of HRSG 1PRH, 2PRH, and 3PRH. HRSG configuration models on CCGT simulated GateCycle Ver 6.0.0.2 with gas turbine siemen V94.2. The results of this paper obtained, such as; the configuration of HRSG 3PRH has thermal efficiency 5.59% greater than HRSG 1PRH and 0.66% greater than the HRSG 2PRH, HRSG configuration models have influence NPV, high thermal efficiency dan high power capacity shall have NPV higher than low thermal efficiency dan low power capacity, the configuration of HRSG 1PRH with interest rate of 8,4% has PBP for 8 years, while the HRSG 2PRH and 3PRH has PBP for 7 years, and the sensitivity factor for currency exchange rates and fuel prices have a high sensitivity to the economic value when compared with the interest rate and the investment cost.;This paper presents HRSG (heat recovery steam generation) configuration models on CCGT (Combined Cycle Power Generation). In order to get the comparison of thermal efficiency, power capacity, LCOE (Levelized Cost of Electricity) and the economic value with approach NPV (Net Present Value), IRR (Internal Rate of Return), PBP (Pay Back Period), and economic sensitivity of each HRSG configuration models. The influence of the HRSG 1P (one pressure), 2P (two pressure) and 3P (three pressure) with the exit turbine gas temperature, the economic analysis of the comparison HRSG 2P, 3P, and 3PHR (three pressure with reheater), and irrevesibel analysis of the three-pressure HRSG with reheating and cooling air to the gas turbine on CCGT have been investigated. In this paper, HRSG configuration models which is compared such as; configuration of HRSG 1PRH, 2PRH, and 3PRH. HRSG configuration models on CCGT simulated GateCycle Ver 6.0.0.2 with gas turbine siemen V94.2. The results of this paper obtained, such as; the configuration of HRSG 3PRH has thermal efficiency 5.59% greater than HRSG 1PRH and 0.66% greater than the HRSG 2PRH, HRSG configuration models have influence NPV, high thermal efficiency dan high power capacity shall have NPV higher than low thermal efficiency dan low power capacity, the configuration of HRSG 1PRH with interest rate of 8,4% has PBP for 8 years, while the HRSG 2PRH and 3PRH has PBP for 7 years, and the sensitivity factor for currency exchange rates and fuel prices have a high sensitivity to the economic value when compared with the interest rate and the investment cost.;This paper presents HRSG (heat recovery steam generation) configuration models on CCGT (Combined Cycle Power Generation). In order to get the comparison of thermal efficiency, power capacity, LCOE (Levelized Cost of Electricity) and the economic value with approach NPV (Net Present Value), IRR (Internal Rate of Return), PBP (Pay Back Period), and economic sensitivity of each HRSG configuration models. The influence of the HRSG 1P (one pressure), 2P (two pressure) and 3P (three pressure) with the exit turbine gas temperature, the economic analysis of the comparison HRSG 2P, 3P, and 3PHR (three pressure with reheater), and irrevesibel analysis of the three-pressure HRSG with reheating and cooling air to the gas turbine on CCGT have been investigated. In this paper, HRSG configuration models which is compared such as; configuration of HRSG 1PRH, 2PRH, and 3PRH. HRSG configuration models on CCGT simulated GateCycle Ver 6.0.0.2 with gas turbine siemen V94.2. The results of this paper obtained, such as; the configuration of HRSG 3PRH has thermal efficiency 5.59% greater than HRSG 1PRH and 0.66% greater than the HRSG 2PRH, HRSG configuration models have influence NPV, high thermal efficiency dan high power capacity shall have NPV higher than low thermal efficiency dan low power capacity, the configuration of HRSG 1PRH with interest rate of 8,4% has PBP for 8 years, while the HRSG 2PRH and 3PRH has PBP for 7 years, and the sensitivity factor for currency exchange rates and fuel prices have a high sensitivity to the economic value when compared with the interest rate and the investment cost.;This paper presents HRSG (heat recovery steam generation) configuration models on CCGT (Combined Cycle Power Generation). In order to get the comparison of thermal efficiency, power capacity, LCOE (Levelized Cost of Electricity) and the economic value with approach NPV (Net Present Value), IRR (Internal Rate of Return), PBP (Pay Back Period), and economic sensitivity of each HRSG configuration models. The influence of the HRSG 1P (one pressure), 2P (two pressure) and 3P (three pressure) with the exit turbine gas temperature, the economic analysis of the comparison HRSG 2P, 3P, and 3PHR (three pressure with reheater), and irrevesibel analysis of the three-pressure HRSG with reheating and cooling air to the gas turbine on CCGT have been investigated. In this paper, HRSG configuration models which is compared such as; configuration of HRSG 1PRH, 2PRH, and 3PRH. HRSG configuration models on CCGT simulated GateCycle Ver 6.0.0.2 with gas turbine siemen V94.2. The results of this paper obtained, such as; the configuration of HRSG 3PRH has thermal efficiency 5.59% greater than HRSG 1PRH and 0.66% greater than the HRSG 2PRH, HRSG configuration models have influence NPV, high thermal efficiency dan high power capacity shall have NPV higher than low thermal efficiency dan low power capacity, the configuration of HRSG 1PRH with interest rate of 8,4% has PBP for 8 years, while the HRSG 2PRH and 3PRH has PBP for 7 years, and the sensitivity factor for currency exchange rates and fuel prices have a high sensitivity to the economic value when compared with the interest rate and the investment cost., This paper presents HRSG (heat recovery steam generation) configuration models on CCGT (Combined Cycle Power Generation). In order to get the comparison of thermal efficiency, power capacity, LCOE (Levelized Cost of Electricity) and the economic value with approach NPV (Net Present Value), IRR (Internal Rate of Return), PBP (Pay Back Period), and economic sensitivity of each HRSG configuration models. The influence of the HRSG 1P (one pressure), 2P (two pressure) and 3P (three pressure) with the exit turbine gas temperature, the economic analysis of the comparison HRSG 2P, 3P, and 3PHR (three pressure with reheater), and irrevesibel analysis of the three-pressure HRSG with reheating and cooling air to the gas turbine on CCGT have been investigated. In this paper, HRSG configuration models which is compared such as; configuration of HRSG 1PRH, 2PRH, and 3PRH. HRSG configuration models on CCGT simulated GateCycle Ver 6.0.0.2 with gas turbine siemen V94.2. The results of this paper obtained, such as; the configuration of HRSG 3PRH has thermal efficiency 5.59% greater than HRSG 1PRH and 0.66% greater than the HRSG 2PRH, HRSG configuration models have influence NPV, high thermal efficiency dan high power capacity shall have NPV higher than low thermal efficiency dan low power capacity, the configuration of HRSG 1PRH with interest rate of 8,4% has PBP for 8 years, while the HRSG 2PRH and 3PRH has PBP for 7 years, and the sensitivity factor for currency exchange rates and fuel prices have a high sensitivity to the economic value when compared with the interest rate and the investment cost.]
2015
T45321
UI - Tesis Membership  Universitas Indonesia Library
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Syahrul Muhammaddiyah
Abstrak :
Heat Pipe Exchanger telah banyak diaplikasikan di berbagai bidang, Salah satu bidang aplikasinya pada sistem Heating Ventilating Air Conditioning HVAC ruang operasi. Sistem HVAC ruang operasi rumah sakit memiliki parameter : temperatur, kelembaban relatif, kebersihan dan pergantian udara perjam. Parameter merupakan syarat mutlak untuk menjaga kualitas udara dalam ruangan indoor air quality dan kenyamanan termal ruang operasi. Rentang temperatur ruang operasi adalah 20-24 °C dan kelembaban relatif pada 30-60 RH. Nilai pergantian udara dalam ruangan operasi minimal 20 kali. Tujuan penelitian untuk mendapatkan nilai efektifitas dan nilai heat recovery dari Heat Pipe Heat Exchanger HPHE yang diuji pada sistem tata udara. HPHE adalah piranti pasif yang mampu memberikan fungsi penghematan energi pada sistem tata udara. HPHE didisain terdiri dari 42 batang heat pipe tubular dilengkapi 120 wavy fin pada evaporator dan kondenser. HPHE dengan konfigurasi 3, 2, dan 1 baris, tiap konfigurasi diuji pada sistem tata udara dengan variasi temperatur aliran udara inlet evaporator : 28, 30, 35, 40, dan 45°C dan variasi kecepatan udara inlet pada 1, 1.5, dan 2 m/detik. Hasil pengujian dari 3 konfigurasi HPHE didapatkan nilai ?T evaporator sebesar 3,24-10,99°C dan nilai efektifitas HPHE dalam rentang 48,3 - 55. Nilai efektifitas tertinggi 55 didapatkan pada kecepatan udara inlet 1 m/detik dan temperatur 45°C pada konfigurasi HPHE 3 Baris. Nilai heat recovery tertinggi dari pengujian terhadap HPHE adalah 6.614 kJ/Jam dihasilkan pada setting kecepatan udara inlet 2 m/detik dengan konfigurasi HPHE 3 Baris. ......Heat Pipe Heat Exchanger has been widely applied in various fields. One area of application is on the operating room Heating Ventilating Air Conditioning HVAC system. The hospital operating room HVAC system has parameters temperature, relative humidity, cleanliness and air change per hour. Parameters are an absolute requirement to maintain indoor air quality indoor air quality and thermal comfort of the operating room. The operating room temperature range is 20-24°Celcius and relative humidity at 30-60 RH. The value of indoor air change at least 20 times per hour. The objective of the study was to obtain the efficiency and heat recovery values of Heat Pipe Heat Exchangers HPHE tested on the air system. HPHE is a passive device that provides energy saving function in the HVAC system. The HPHE is designed to consist of 42 tubular heat pipe tubes equipped with 120 wavy fins on evaporator and condenser. HPHE with 3, 2, and 1 row configurations, each configuration tested on an air system with variations of evaporator inlet airflow temperature 28, 30, 35, 40, and 45°C and variations in air velocity at 1, 1.5, and 2 m seconds. Test results from 3 HPHE configurations obtained T evaporator value of 3.24 10.99°C and HPHE effectiveness value in the range of 48.3 55. The highest effectiveness value of 55 was obtained at air velocity of inlet 1 m sec and temperature 45°C in HPHE 3 row configuration.The highest HPHE heat recovery value of 6,614 kJ hour was obtained at air velocity of 2 m sec inlet with HPHE 3 row configuration.
Depok: Fakultas Teknik Universitas Indonesia, 2017
T47780
UI - Tesis Membership  Universitas Indonesia Library
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Muhammad Rafif Diyartazhar
Abstrak :
Konsumsi energi dari sistem pengkondisian udara pada gedung perkantoran menempati urutan tertinggi pada konsumsi energi keseluruhan dari gedung tersebut. Penelitian ini bertujuan untuk mengetahui pengaruh penggunaan heat pipe heat exchanger (HPHE) pada sistem heating, ventilation and air conditioning (HVAC) office building dan menganalisis penggunaan korelasi Sp number. HPHE yang digunakan pada penelitian ini merupakan straight HPHE yang terdiri dai 6 baris yang terdiri dari empat heat pipe pada tiap baris. Temperatur fresh air divariasikan pada temperatur 30, 35, 40 dan 45  °C dengan kecepatan udara masuk pada sisi evaporator (ve,in) sebesar 1,0; 1,5 dan 2,0 m/s. Penelitian dilakukan pada model sistem HVAC office building dengan beban ruangan pada chamber pengujian divariasikan pada nilai 200 dan 300 W. Hasil eksperimen menunjukkan Nilai efektifitas terbesar 40,324% pada kecepatan udara inlet (vin) 1,0 m/s dengan temperatur fresh air 45 °C dan beban ruangan sebesar 200 W. Heat recovery HPHE terbesar mencapai 398,72 W pada variasi kecepatan udara inlet 2,0 m/s dengan temperatur fresh air 45 °C dan beban ruangan 200 W. Nilai absolute error terkecil dari penggunaan korelasi Sp number terdapat pada variasi kecepatan udara inlet 2,0 m/s dengan beban ruangan 300 W, yaitu sebesar 11% dan absolute error terbesar pada variasi kecepatan udara inlet 1,0 m/s dengan beban ruangan 200 W, yaitu sebesar 51,17%.

 


The energy consumption of the air conditioning system in an office building ranks highest in the overall energy consumption of the building. This study aims to determine the effect of using a heat pipe heat exchanger (HPHE) on the heating, ventilation and air conditioning (HVAC) office building system and analyze the use of Sp number correlation. The HPHE used in this study is a straight HPHE consisting of 6 lines consisting of four heat pipes in each row. The temperature of fresh air was varied at temperatures of 30, 35, 40 and 45 °C with the air velocity entering the evaporator side (ve, in) of 1.0; 1.5 and 2.0 m/s. The research was conducted on an office building HVAC system model with room loads in the testing chamber varied at values of 200 and 300 W. The experimental results show the greatest effectiveness value is 40.324% at the inlet air velocity (vin) 1.0 m/s with a fresh air temperature of 45 °C. and room load of 200 W. The largest HPHE heat recovery reached 398.72 W at a variation of the inlet air velocity 2.0 m/s with a fresh air temperature of 45 °C and a room load of 200 W. The smallest absolute error value from the use of the Sp number correlation was found in the variation of the inlet air velocity of 2.0 m/s with a room load of 300 W, which is 11% and the largest absolute error in the variation of the inlet air velocity of 1.0 m/s with a room load of 200 W, which is 51.17%.

 

Depok: Fakultas Teknik Universitas Indonesia, 2022
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UI - Skripsi Membership  Universitas Indonesia Library
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Farhan Aditya Wibowo
Abstrak :
Sistem HVAC pada office building berperan penting untuk menyediakan kenyamanan yang ideal bagi pengguna di dalamnya. Hal ini menyebabkan besarnya konsumsi energi di sektor perkantoran. Penelitian ini bertujuan untuk mengetahui efektifitas dan heat recovery dari penggunaan heat pipe heat exchanger dan return air. Volume return air yang digunakan dalam penelitian ini sebesar 30% dan HPHE yang digunakan berjumlah dua modul yang terdiri dari 3 baris heat pipe per modul. Pada inlet evaporator dialiri udara dengan variasi temperatur: 30, 35, 40, dan 45°C, serta dengan kecepatan 1,0; 1,5; dan 2,0 m/s. Beban pada ruangan bervariasi 200 dan 300W. Hasil dari percobaan ini mendapatkan nilai efektifitas HPHE terbesar pada percobaan temperature udara masuk 45oC; vin 1m/s; vout 2m/s; dan beban ruangan 200W yaitu sebesar 0,403 atau 40,3%. Heat recovery HPHE terbesar didapatkan pada percobaan temperature udara masuk 45oC; vin 2m/s; vout 2m/s; dan beban ruangan 200W yaitu sebesar 398,720W. Hasil dari penelitian menunjukkan bahwa penggunaan return air memengaruhi temperatur inlet evaporator. ......HVAC systems in office buildings play an important role in providing ideal comfort for users in the building. This causes a large amount of energy consumption in the office sector. This study aims to determine the effectiveness and heat recovery from the use of heat pipe heat exchangers and return air. The return air volume used in this study was 30% and the HPHE used was two modules consisting of 3 lines of heat pipe per module. At the inlet of the evaporator, air flows with variations in temperature: 30, 35, 40, and 45°C, and with a speed of 1.0; 1.5; and 2.0 m/s. The load on the room varies between 200 and 300W. The results of this experiment get the greatest HPHE effectiveness value at the 45oC intake air temperature experiment; vin 1m/s; vout 2m/s; and 200W room load that is equal to 0.403 or 40.3%. The largest HPHE heat recovery was found in the 45oC intake air temperature experiment; vin 2m/s; vout 2m/s; and the room load is 200W, which is 398,720W. The results of the study indicate that the use of return water affects the inlet temperature of the evaporator.
Depok: Fakultas Teknik Universitas Indonesia, 2022
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UI - Skripsi Membership  Universitas Indonesia Library
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Hamdzan
Abstrak :
Floating Production Unit (FPU) Jangkrik mengolah gas dari Lapangan Kompleks Jangkrik dan potensi lapangan baru lain di sekitarnya. Evaluasi debottlenecking diperlukan sebagai upaya untuk peningkatan produksi, disertai kompleksitas tekanan inlet yang semakin rendah, dan tambahan dari sumber lapangan lain. Sehingga perlu dilakukan beberapa modifikasi pada unit pengolahan FPU, salah satunya MEG Regenerasi Unit (MRU). MEG dalam jumlah yang lebih besar harus diinjeksikan ke sumur bawah laut dan unit pengontrol titik embun untuk menekan pembentukan hidrat. Hal ini mengharuskan MRU untuk lebih banyak meregenerasi MEG yang ramping dari MEG yang kaya. Untuk mencapainya diperlukan nilai tukar panas yang lebih tinggi pada Reclaimer Loop Heaters. Persyaratan ini dapat dipenuhi dengan meningkatkan suhu atau laju aliran sumber panas yang berasal dari air panas. Unit Pemulihan Panas Limbah (Weast Hate Recovery Unit/WHRU) dan Sistem Air Panas, masing-masing bertanggung jawab memproduksi dan mendistribusikan air. Studi ini menyajikan evaluasi WHRU dan Sistem Air Panas untuk mengetahui kemampuannya dalam menyediakan suhu/debit air panas yang lebih tinggi ke Reclaimer Loop Heaters. Model matematika digunakan untuk menghitung kemampuan WHRU dalam menyediakannya pada suhu dan debit yang diinginkan. Beberapa permasalahan mekanis terkait keselamatan akan dipertimbangkan sehubungan dengan risiko penguapan, yang dapat terjadi bila suhu air panas dinaikkan mendekati atau melebihi suhu penguapannya pada tekanan operasi. Kemudian, Sistem Air Panas dievaluasi kemampuannya untuk mengalirkan suhu/debit air panas yang lebih tinggi. ......The Jangkrik Floating Production Unit (FPU) processes gas from the Jangkrik Complex Field and other potential new fields in the vicinity. Evaluation of debottlenecking is needed as an effort to increase production, accompanied by the complexity of lower inlet pressure, and additional sources from other fields. So several modifications need to be made to the FPU processing unit, one of which is the MEG Regeneration Unit (MRU). Larger amounts of MEG should be injected into subsea wells and dew point control units to suppress hydrate formation. This requires the MRU to regenerate more lean MEG from rich MEG. To achieve this, a higher heat exchange rate is required in the Reclaimer Loop Heaters. This requirement can be met by increasing the temperature or flow rate of the heat source from the hot water.

The Waste Heat Recovery Unit (WHRU) and the Hot Water System are each responsible for producing and distributing water. This study presents an evaluation of the WHRU and Hot Water System to determine its ability to provide higher hot water temperature/discharge to the Reclaimer Loop Heaters. Mathematical models are used to calculate WHRU's ability to provide it at the desired temperature and discharge. Several safety-related mechanical issues will be considered in connection with the risk of evaporation, which can occur when the temperature of hot water is raised to near or above its evaporation temperature at operating pressure. Then, the Hot Water System is evaluated for its ability to deliver a higher temperature/hot water flow.

Depok: Fakultas Teknik Universitas Indonesia, 2023
PR-pdf
UI - Tugas Akhir  Universitas Indonesia Library
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Andi Taufan
Abstrak :
ABSTRAK
Pendingin adsorpsi merupakan salah satu solusi terkait permasalahan lingkungan oleh pendingin konvensional. Naskah ini mempresentasikan desain terbaru silica gel-water adsorption chiller yang dikembangkan di Departemen Teknik Mesin, Universitas Indonesia. Konfigurasi chiller terdiri atas dua ruang penyerapan dengan menggunakan fin tube heat exchangers sebagai adsorber, kondenser, and evaporator. Chiller diuji pada kondisi temperatur hot water inlet/cooling water inlet/chilled water outlet sebesar 64.4/31/8.9oC. Heat dan mass recovery diadopsi dalam eksperimen untuk meningkatkan kapasitas pendinginan. Waktu proses pendinginan divariasikan untuk memperoleh waktu optimal berkaitan dengan performa. Nilai COP dan kapasitas pendinginan diperoleh sebesar 0.77 dan 3.2 pada saat waktu adsorpsi/mass recovery/heat recovery sebesar 600/40/20 s.
ABSTRACT
Adsorption chiller is one of the solution related to enviromental issues by conventional refrigeration. This paper presented a new design of silica gel water adsorption chiller that is developed in Mechanical Engineering, Universitas Indonesia. The chiller design configuration is composed of two sorption chambers with compact fin tube heat exchangers as adsorber, condenser, and evaporator. The chiller is tested under typical condition for hot water inlet cooling water inlet chilled water outlet temperatures are 64.4 31 8.9oC, respectively. Heat and mass recovery were adopted in experimen to increase the cooling capacity. The cooling time was variated to obtain the heat recovery optimum time related to the performance. Average value of COP and colling power were obtained 0.77 and 3.2 kW, respectively, at adsorption mass recovery heat recovery time 600 40 20.
2017
T47262
UI - Tesis Membership  Universitas Indonesia Library
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Aris Manga
Abstrak :
ABSTRAK
Teknik refrijerasi dengan penyerapan, yang menggunakan energi kalor yang rendah dan mampu menghasilkan pengkondisian udara serta efek refrijerasi, mendapatkan perhatian besar sebagai bagian dari teknologi konversi energi. Teknologi refrijerasi dengan penyerapan mencakup teknologi absorpsi dan teknologi adsorpsi. Naskah ini mempresentasikan desain terbaru chiller adsorpsi silica gel/air yang dikembangkan di Departemen Teknik Mesin, Universitas Indonesia. Konfigurasi chiller terdiri dari dua ruang penyerapan, dengan menggunakan rectangular finned-tube heat exchanger sebagai adsorber, kondenser and evaporator. Chiller diuji pada kondisi temperatur hot water inlet/cooling water inlet sebesar 65/30 C. Heat dan mass recovery diadopsi dalam eksperimen untuk meningkatkan kapasitas pendinginan masing-masing dengan waktu 40 dan 20 detik. Waktu siklus pendinginan pada 800,700,600 dan 500 detik untuk menghasilkan waktu optimal yang berkaitan dengan performa. Nilai rata-rata COP, SCP dan kapasitas pendinginan dihitung untuk mendapatkan performa chiller secara keseluruhan masing-masing 0,6 kW; 0,7 kW/kg dan 3 kW.Kata kunci: chiller adsorpsi; heat recovery; mass recovery; performa; penyerapan; silica gel/air
ABSTRACT
Sorption refrigeration, which is driven by the lowgrade heat and provides the air conditioning and refrigeration effect, is paid more and more attention as one of the energy conversion technologies. Sorption technology includes absorption and adsorption technology. This paper presented a new design of silica gel water adsorption chiller which is developed in Mechanical Engineering Department, University of Indonesia. The chiller design configuration is composed of two sorption chamber, with compact rectangular finned tube heat exchanger as adsorber, condenser and evaporator. The chiller is tested under typical condition for hot water inlet cooling water inlet 65 30 C, respectively. Heat and mass recovery were adopted in experiment to increase the cooling capacity time are 40 and 20 s, respectively. The cooling time were 800,700,600 and 500 s to obtain the optimum cooling time related to the performance. Average value of COP, SCP and cooling power were calculated to obtain overall performance of the chiller are 0.6 kW 0.7 kW kg and 3 kW, respectively.Keywords adsorption chiller heat recovery mass recovery performance silica gel water sorption
2016
T47239
UI - Tesis Membership  Universitas Indonesia Library
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Sugeng Triyanto
Abstrak :
ABSTRAK
Salah satu program penghematan energi adalah pemanfaatan sumber energi secara e_[)?3.s'ien dengan menekan kerugian energi dan memargfaatkan kembali panas Iebih. Panos lebih pada .sistem pendingin konvensional di sisi kondensar cufwp besar dan tidak dimanfaatkan. Pans tersebut dilepaskun Ina media pendingin re_/Hgeran, yaitu melalui air arau udara.

Dengan hen! recovery condenser dan beberapa alat pelanglmp laimgya, _nada sistem mesin pendingin, didapat siszem yang lebih ejfekzzlf dan e_[}?lsien. Sistem ini mampu menank kembali panes Iebzh pada kondenser dan dapat dimanfaatlam :mink proses pemanasan adam alan air.

Heat recovery condenser yang digunakan adalah kondensor berpandingin air; sehingga panas yang dilepaskan oleh rafrigeran disarap oleh aliran massa air. Sehingga terjadi parpindahan energi panas dari refrigeran kepada air.

Skripsi ini menganalisa pemanfaatan heal recovery condenser :mink prose: pemanasan pada sistem pengkondisian udara dan pemanasan air. Analisa yang dilakulran bertujuan unruk mengezahui penghemaran energi dan Iwnnzmsi bahan baimr pada siftem. Selanjutnya melalmkan perbandlngan antara Siszem perzgkondisian udara dan pernerruhan air hangat pada kebumhan yang sama antara mesa): pendingin dengan heat recovery oondenver dan mesin pendingin yang konvensional (tidal: memanfaatkan panas Iebih pada kondensor).
1996
S36563
UI - Skripsi Membership  Universitas Indonesia Library
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