| dc.description.abstract | Eksperimen ini bertujuan untuk mengetahui sejauh mana gas buang dari mesin diesel yang mengandung potensial energi termal dapat dimanfaatkan sebagai pemanas air dengan mempergunakan alat penukar kalor sehingga diperoleh gambaran efektivitas dari alat tersebut .
Peralatan yang dipergunakan dalam eksperimen ini adalah alat penukar kalor shell and tube 1 pass shell and 1 pass tube yang dirancang dan dibuat berdasarkan hasil simulasi dengan program visual basic. Peralatan ini terbuat dari bahan ASME 304 jumlah tube 19 buah, diameter 19.05 mm, panjang 1.26 m, susunan segitiga, sekat 18 buah, baffle cut 26,5 % dan diameter shell 5. Pengamatan dilakukan dengan memvariasikan laju aliran fluida air dengan temperatur gas buang masuk ke alat penukar kalor untuk putaran mesin diesel 1500 rpm, 2000 rpm, 2500 rpm pada beban 0 kW, 10 kW, 20 kW dan 30 kW . Fluida air dialirkan disisi shell dan gas buang dialirkan kedalam tube.
Hasil penelitian diperoleh, bahwa efektivitas dari hasil percobaan dipengaruhi oleh temperatur air keluar, temperatur gas buang keluar, besar laju aliran massa air dan banyak kalor yang diserap fluida dingin. Efektivitas yang paling efektif adalah
€ = 81,75 % pada putaran 2000 rpm dan beban 30 kW dan hubungan efektivitas alat penukar kalor terhadap banyak kalor yang diserap fluida dingin dan temperatur air keluar mempergunakan metode Regresi Linier Multiple adalah :
€30=-214,1324+27,1774 Q+ 0,322443 Tc,o berlaku laju aliran kalor 9,271<Q <10,372 dengan temperatur air keluar 99,13 oC | en_US |
| dc.description.abstract | The experiment intends to know how far is the exhaust gas of diesel engine containing a potential thermal energy may be used as a water heater by using a heat exchanger to find the effectiveness of the tool .
The tool used in the experiment included heat exchanger of shell and tube one pass shell and one pass tube were designed and made on the base of the result of simulation using visual basic program. The tool was made of ASME 304 consisting of 19 tubes, with a diameter of 19.05 mm and length of 1.26 m with a triangle structure, 18 partitions, 26.5 % baffle cut and shell diameter of 5 inches. The measurement was carried out by alternating the flow rate of water fluid and temperature of exhaust gas incorporated into heat exchanger at 1500 rpm, 2000 rpm and 2500 rpm of diesel engine with each revolution receive payload at 0 kW, 10 kW, 20 kW and 30 kW. The water fluid was flowed in the edge of shell and the exhaust gas was flowed into the tubes.
The results of the experiment showed that the effectiveness of heat exchanger was influenced by outlet water temperature, outlet exhaust gas temperature, mass flow rate of water and the amount of heat absorbed by the cold fluid. The most effective of the effectiveness is € = 81.75 % at 2000 rpm and 30 kW load. The correlation of the heat exchanger effectiveness to the amount of heat absorbed by the cold fluid and outlet water temperature by using multiple linear regression method is :
€30 = - 214.1324 +27.1774 Q + 0.322443 Tc,o for heat flow rate more than 9.271 kW and less than 10.372 kW with outlet water temperature 99.13 oC | en_US |
