Modification and Performance Analysis of Small Agricultural Engines Fueled with Producer Gas

This research was carried out to modify of small diesel engines into spark ignited engines with producer gas as fuel. The objectives were to study effect of combustion chamber type, compression ratio, engine speed and load on engine performance, exhaust emission, fuel cost and to apply mathematical...

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Main Author: Nigran Homdoung
Other Authors: Assoc. Prof. Dr. Nakorn Tippayawong
Format: Theses and Dissertations
Language:English
Published: เชียงใหม่ : บัณฑิตวิทยาลัย มหาวิทยาลัยเชียงใหม่ 2020
Online Access:http://cmuir.cmu.ac.th/jspui/handle/6653943832/69321
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Institution: Chiang Mai University
Language: English
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spelling th-cmuir.6653943832-693212020-08-04T06:14:17Z Modification and Performance Analysis of Small Agricultural Engines Fueled with Producer Gas การดัดแปลงและการวิเคราะห์สมรรถนะของเครื่องยนต์การเกษตรขนาดเล็กที่ใช้ก๊าซโปรดิวเซอร์เป็นเชื้อเพลิง Nigran Homdoung Assoc. Prof. Dr. Nakorn Tippayawong Assoc. Prof. Thawan Sucharitakul Asst. Prof. Dr. Watcharapong Tachajapong This research was carried out to modify of small diesel engines into spark ignited engines with producer gas as fuel. The objectives were to study effect of combustion chamber type, compression ratio, engine speed and load on engine performance, exhaust emission, fuel cost and to apply mathematical model to predict performance of SI producer gas engine. The original engines before modification were small agricultural diesel engines; having four strokes and 598 CC. Modification was performed for combustion chamber, CR, ignition system and air gas mixer. Producer gas was derived from longan charcoal with mean calorific value of 4.64 MJ/Nm3. The experiments were carried out for bath tub and cavity combustion chambers with varied CR of 9.7:1, 14:1 and 17:1. The engine speed was 1100, 1300, 1500, 1700 and 1900 rpm and load was 20 %, 40 %, 60 %, 80 % and 100 %. The performance of engine was evaluated for torque, brake power, BTE, BSFC, BSEC, and exhaust emission, and compared with diesel engine on similar experiment condition. It was found that the modified engine was able to operate with producer gas successfully. Smooth, operation stability and continuous running were obtained. The COV of engine was between 1.75 to 3.0 %. Maximum performance of engine in bath tub combustion chamber occurred at 14:1 of CR, 1700 rpm, 40 BTDC on full load with torque, brake power, BTE, and BSFC of 18.61 Nm, 3.31 kW, 18.77 % and 0.94 kg/kWh, respectively. For the cavity combustion chamber, the maximum performance of engine occurred at similar conditions to bath tub combustion chamber, except, the ignition timing was at 45 BTDC. The torque, brake power, BTE, and BSFC of 18.05 Nm, 3.21 kW, 23.90 % and 0.74 kg/kWh, respectively, were obtained, while for diesel engine, the torque, brake power and BTE were 26.49 Nm, 4.71 kW and 26.95 %, respectively, compared with producer gas engine at similar test condition. The fuel cost of producer gas engine was lower than diesel engine, while, exhaust emissions were similar. The mathematical model gave good agreement with experimental results and can predict the performance of the gas engine well. The differences were within 6.5 %. 2020-08-04T06:14:16Z 2020-08-04T06:14:16Z 2015-02 Thesis http://cmuir.cmu.ac.th/jspui/handle/6653943832/69321 en เชียงใหม่ : บัณฑิตวิทยาลัย มหาวิทยาลัยเชียงใหม่
institution Chiang Mai University
building Chiang Mai University Library
continent Asia
country Thailand
Thailand
content_provider Chiang Mai University Library
collection CMU Intellectual Repository
language English
description This research was carried out to modify of small diesel engines into spark ignited engines with producer gas as fuel. The objectives were to study effect of combustion chamber type, compression ratio, engine speed and load on engine performance, exhaust emission, fuel cost and to apply mathematical model to predict performance of SI producer gas engine. The original engines before modification were small agricultural diesel engines; having four strokes and 598 CC. Modification was performed for combustion chamber, CR, ignition system and air gas mixer. Producer gas was derived from longan charcoal with mean calorific value of 4.64 MJ/Nm3. The experiments were carried out for bath tub and cavity combustion chambers with varied CR of 9.7:1, 14:1 and 17:1. The engine speed was 1100, 1300, 1500, 1700 and 1900 rpm and load was 20 %, 40 %, 60 %, 80 % and 100 %. The performance of engine was evaluated for torque, brake power, BTE, BSFC, BSEC, and exhaust emission, and compared with diesel engine on similar experiment condition. It was found that the modified engine was able to operate with producer gas successfully. Smooth, operation stability and continuous running were obtained. The COV of engine was between 1.75 to 3.0 %. Maximum performance of engine in bath tub combustion chamber occurred at 14:1 of CR, 1700 rpm, 40 BTDC on full load with torque, brake power, BTE, and BSFC of 18.61 Nm, 3.31 kW, 18.77 % and 0.94 kg/kWh, respectively. For the cavity combustion chamber, the maximum performance of engine occurred at similar conditions to bath tub combustion chamber, except, the ignition timing was at 45 BTDC. The torque, brake power, BTE, and BSFC of 18.05 Nm, 3.21 kW, 23.90 % and 0.74 kg/kWh, respectively, were obtained, while for diesel engine, the torque, brake power and BTE were 26.49 Nm, 4.71 kW and 26.95 %, respectively, compared with producer gas engine at similar test condition. The fuel cost of producer gas engine was lower than diesel engine, while, exhaust emissions were similar. The mathematical model gave good agreement with experimental results and can predict the performance of the gas engine well. The differences were within 6.5 %.
author2 Assoc. Prof. Dr. Nakorn Tippayawong
author_facet Assoc. Prof. Dr. Nakorn Tippayawong
Nigran Homdoung
format Theses and Dissertations
author Nigran Homdoung
spellingShingle Nigran Homdoung
Modification and Performance Analysis of Small Agricultural Engines Fueled with Producer Gas
author_sort Nigran Homdoung
title Modification and Performance Analysis of Small Agricultural Engines Fueled with Producer Gas
title_short Modification and Performance Analysis of Small Agricultural Engines Fueled with Producer Gas
title_full Modification and Performance Analysis of Small Agricultural Engines Fueled with Producer Gas
title_fullStr Modification and Performance Analysis of Small Agricultural Engines Fueled with Producer Gas
title_full_unstemmed Modification and Performance Analysis of Small Agricultural Engines Fueled with Producer Gas
title_sort modification and performance analysis of small agricultural engines fueled with producer gas
publisher เชียงใหม่ : บัณฑิตวิทยาลัย มหาวิทยาลัยเชียงใหม่
publishDate 2020
url http://cmuir.cmu.ac.th/jspui/handle/6653943832/69321
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