Desain Dan Analisis Performa Waste Heat Recovery Heat Exchanger Tipe Plat Sirip Pada Gas-Powered Air Conditioner

Rafael, Eugenius Mauritz (2019) Desain Dan Analisis Performa Waste Heat Recovery Heat Exchanger Tipe Plat Sirip Pada Gas-Powered Air Conditioner. Other thesis, Institut Teknologi Sepuluh Nopember.

Text 02111540000103_Undergraduate_Thesis.pdf Restricted to Repository staff only Download (2MB) | Request a copy

Abstract

Dewasa ini masalah utama yang dihadapi di seluruh dunia adalah berkurangnya bahan bakar fosil dan polusi yang disebabkannya. Penyelesaian permasalahan ini dapat didekati dengan beberapa cara, salah satunya adalah meningkatkan efisiensi komponen yang menggunakan bahan bakar fosil. Gas Engine Heat Pump adalah sistem pompa kalor yang menggunakan gas bumi sebagai bahan bakar. Gas Engine Heat Pump yang dioperasikan untuk sistem pendingin ruangan dapat disebut juga sebagai Gas Powered Air Conditioner (GPAC). Pemanfaatan panas sisa dari gas pembuangan dapat digunakan kembali menggunakan heat exchanger agar performa dari keseluruhan sistem pendingin menjadi lebih tinggi. Aplikasi teknologi GPAC yang dipadukan dengan waste heat recovery heat exchanger menghasilkan solusi energy saving pada sektor penyejuk ruangan bagi perhotelan. Salah satu pemanfaatan waste heat recovery pada sistem pendingin ruangan adalah persediaan air hangat. Pada tugas akhir ini dilakukan proses desain siklus kompresi uap berdasarkan referensi beban pendinginan pada suatu hotel dan analisis desain compact heat exchanger tipe plate-fin heat exchanger untuk memenuhi proses perpindahan panas dari gas buang ke air. Gas buang yang merupakan produk sampingan dari gas engine dianalisis dari jumlah massa gas buang dan temperatur gas buang untuk mengetahui potensi pemanfaatan panas gas buang. Perhitungan dimensi heat exchanger dilakukan dengan metode Logarithmic Mean Temperature Difference. Perhitungan yang dilakukan mencakup perhitungan koefisien perpindahan panas konveksi fluida dingin dan panas dan luas perpindahan panas kedua fluida untuk mendapatkan nilai UA. Desain heat exchanger kemudian dilanjutkan dengan analisis performa terhadap beban pendinginan operasi GPAC dan variasi laju alir massa air yang dipanaskan.
Hasil yang diperoleh dari tugas akhir ini adalah dimensi plate-fin heat exchanger dengan spesifikasi 9.03 dengan panjang 705 mm, lebar 500 mm, dan tinggi 400 mm. Besar panas yang dimanfaatkan dan dipindahkan untuk penyediaan air panas sebesar 36310.73 W. Hasil analisis performa menunjukkan peningkatan coefficient of performance (COP) combined sebesar 2.04 hingga 2.19. COP cooling dan COP heating mengalami kenaikan seiring peningkatan beban pendinginan. Operasi GPAC dengan waste heat recovery memenuhi kebutuhan persediaan air hangat pada hotel sebesar 50.67% saat hari biasa dan 35.62% saat hari padat pengunjung.
=======================================================================================================================================
The main problems faced by the world today are the depletion of fossil fuel resources and the environmental pollution caused by their use. One approach to addressing these problems is to improve the efficiency of energy conversion systems that still rely on fossil fuels. A Gas Engine Heat Pump (GEHP) is one type of heat pump system that utilizes natural gas as its energy source. When operated as an air-conditioning system, it is commonly referred to as a Gas Powered Air Conditioner (GPAC). A GPAC uses a gas engine to drive the compressor of the heat pump system. The waste heat contained in the engine exhaust gas can be recovered through a heat exchanger to improve the overall performance of the air-conditioning system. This concept offers an energy-saving solution for hotel air-conditioning systems, where the recovered waste heat can be utilized to heat domestic water supplies. This study focuses on the design of a vapor compression refrigeration cycle based on the cooling load requirements of a hotel. A compact plate-fin heat exchanger was designed to facilitate heat transfer from the exhaust gas to domestic water. The exhaust gas produced by the gas engine during power generation was analyzed in terms of its mass flow rate and temperature to determine the amount of recoverable heat. The heat exchanger dimensions were calculated using the Logarithmic Mean Temperature Difference (LMTD) method, including the determination of the convective heat transfer coefficients of both the hot and cold fluids to obtain the overall heat transfer coefficient (UA). Performance analysis was conducted by varying the cooling load. The results showed that the designed plate-fin heat exchanger employed surface geometry 9.03 with dimensions of 705 mm in length, 500 mm in width, and 400 mm in height. The total recoverable heat was approximately 36,310.73 W. Performance analysis indicated that incorporating waste heat recovery increased the coefficient of performance (COP) from 2.03 to 2.19. Both cooling and heating performance improved as the cooling load increased. The combined operation of the GPAC system and waste heat recovery was capable of supplying approximately 50.67% of the domestic hot water demand under normal conditions and 35.62% during peak occupancy.

Item Type:	Thesis (Other)
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ263 Heat exchangers T Technology > TJ Mechanical engineering and machinery > TJ762.E93 Exhaust systems T Technology > TJ Mechanical engineering and machinery > TJ785 Internal combustion engines. Spark ignition
Divisions:	Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	Eugenius Mauritz Rafael
Date Deposited:	21 Jul 2026 02:10
Last Modified:	21 Jul 2026 02:10
URI:	http://repository.its.ac.id/id/eprint/67947

Actions (login required)

View Item