Excelrichap, Excelrichap (2020) ANALISA PENGARUH LAJU ALIRAN UDARA PENDINGIN KONDENSOR PADA SISTEM ORC 1 KW MENGGUNAKAN APLIKASI ASPEN PLUS. Other thesis, Institut Teknologi Sepuluh Nopember.
Preview |
Text
02111640000220-Undergraduate_Thesis.pdf Download (3MB) | Preview |
Abstract
ABSTRAK
Kebutuhan energi dunia semakin meningkat seiring dengan kemajuan teknologi, sehingga dibutuhkan sumber energi yang dapat memenuhi kebutuhan tersebut. Sumber energi yang diinginkan adalah sumber energi yang tidak merusak lingkungan. Industri-industri mempunyai energi buangan berupa waste heat. Waste heat dikategorikan menjadi 3 jenis yaitu high grade waste heat (>650ºC), medium grade waste heat (200 – 650ºC) dan low grade waste heat (<200ºC). Waste heat yang terbanyak merupakan waste heat dengan kategori low grade waste heat. Low grade waste heat ini sulit untuk dimanfaatkan karena temperaturnya yang rendah, akan tetapi dapat digunakan siklus Organic Rankine Cycle (ORC) dimana ORC menggunakan fluida kerja yang dapat dengan mudah berubah fase menjadi uap panas (steam) dengan energi panas rendah.
Penelitian dilakukan menggunakan rangkaian ORC sederhana dengan fluida kerja R141b dan fluida pendinginnya udara. Simulasi ini dilakukan dengan menggunakan software Aspen Plus V10. Temperatur keluaran evaporator di asumsikan sebesar 100℃. Fluida pendingin pada kondensor menggunakan udara dengan suhu ruangan 28℃ Pada simulasi, suhu pemanas dan tekanan keluaran evaporator dijaga konstan. Laju aliran udara pendingin kondensor diatur dengan variasi 0,38-0,62 kg/s. Tekanan inlet kondensor didapatkan dari hasil perhitungan berdasarkan laju aliran pendingin. Hasil percobaan bertujuan untuk mendapatkan informasi pengaruh laju aliran udara pendingin kondensor terhadap performa ORC kapasitas 1 kw.
Hasil yang didapatkan dari simulasi, semakin besar laju aliran udara pendingin kondensor, semakin besar pula daya turbin yang dihasilkan dan daya pompa yang dibutuhkan juga semakin besar. Pada variasi laju aliran udara pendingin terbesar yaitu 0,62 kg/s didapatkan daya turbin potensial terbesar yaitu 1281,45 Watt dan daya pompa yang dibutuhkan sebesar 14,86 Watt sehingga mempunyai efisiensi termal sebesar 7,47%. Berdasarkan efisiensi termal dan net power sistem tertinggi didapatkan ketika laju aliran udara pendingin kondensor pada variasi maksimal yaitu 2,2 m/s.
====================================================================================================================
ABSTRACT
The world's energy needs are increasing along with technological advances, so that energy sources are needed that can meet these needs. The desired energy source is an energy source that does not damage the environment. Industries mostly have waste energy in the form of waste heat. Waste heat is categorized into 3 types, namely high grade waste heat (> 650ºC), medium grade waste heat (200 - 650ºC) and low grade waste heat (<200ºC). The most waste heat is waste heat in the low grade waste heat category. Low grade waste heat is difficult to be used because of its low temperature, however, an Organic Rankine Cycle (ORC) cycle can be used where ORC uses a working fluid that can easily change phases to steam with low heat energy.
The research was conducted using a simple ORC circuit with the working fluid R141b and the cooling fluid air. This simulation is done using Aspen Plus V10 software. The evaporator output temperature is assumed to be 100 ℃. The cooling fluid in the condenser uses air with room temperature 28 ℃ In the simulation, the heating temperature and the evaporator output pressure are kept constant. The condenser cooling air flow rate is adjusted with a variation of 0.38-0.62 kg/s. The condenser inlet pressure is obtained from the calculation based on the coolant flow rate. The simulation results purpose is to obtain information on the effect of condenser cooling air flow rate for the ORC system performance with 1 kW capacity.
The results obtained from the simulation, the greater the condenser cooling air flow rate, the greater the turbine power generated and the pump power required is also greater. In the largest cooling air flow rate variation, 0.62 kg/s, the largest potential turbine power is 1281.45 Watt and the required pump power is 14.86 Watt so that it has a thermal efficiency of 7.47%. Based on thermal efficiency and the highest net power system is obtained when the air flow rate of the condenser cooler is at the maximum variation of 2.2 m/s.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Organic Rankine Cycle, low grade waste heat, laju aliran udara pendingin, Organic Rankine Cycle, low grade waste heat, cooling air flow rate |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ164 Power plants--Design and construction |
| Divisions: | Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis |
| Depositing User: | excelrichap excelrichap |
| Date Deposited: | 24 Aug 2020 04:50 |
| Last Modified: | 23 Jun 2023 07:33 |
| URI: | http://repository.its.ac.id/id/eprint/78651 |
Actions (login required)
 |
View Item |