This research carries out all tests in diesel engine takes neat diesel and hydrogen+oxygen (H2/O2) which is used as an additive (H2/O2 mixture: 10 to 70 L/min, interval 10 L/min) in a stable state condition (engine was operated at one load steady-state condition of 1600 rpm with torque and power outputs of 145 Nm and 24.5 kW, respectively). Characteristics of carbonyls emissions from H2/O2 as an additive were investigated in a HDDE (heavy-duty diesel engine) and compared with those from neat diesel, contains the concentration, emission factor and elimination efficiency, whole of change tendency in order to help the understanding of diesel engine pollutant emissions, and appraises energy conservation of benefit which add to H2/O2.
The regulated pollutants emission, using H2/O2 mixture (10 to 70 L/min), THC, CO, CO2 and PM emission all increased while H2/O2 showed signs of decrease; on the contrary, NOx emission increased while H2/O2 increased.
Regarding Carbonyls emissions, the total carbonyls concentration of diesel engine take neat diesel was 3218.02 £gg/m3 and the emission factors for diesel engine take neat diesel were 180.882 mg/bhp-hr and 788.061 mg/L-fuel, respectively. When H2/O2 mixture was added, total carbonyls concentration of 3068.28, 3006.42, 2823.10, 2707.06, 2500.54, 2216.87 and 2178.27 mg/m3 were 10 L/min, 20 L/min, 30 L/min, 40 L/min, 50 L/min, 60 L/min and 70 L/min, respectively. The emission factor may be divided into mg/bhp-hr and mg/L-fuel; the emission factor of total carbonyls were 231.36¡B226.18¡B211.41¡B203.14¡B186.98¡B167.17 and 164.23 mg/bhp-hr, respectively; the emission factor of total carbonyls were 764.95¡B755.15¡B719.97¡B707.36¡B704.40¡B694.27 and 690.47 mg/L-fuel, respectively. Increases in H2/O2 can reduce total carbonyls emissions with an eliminating efficiency rate of 4.7, 6.6, 12.3, 15.9, 22.3, 31.1 and 32.3%, respectively.
Energy conservation of appraisal increase H2/O2, diesel equivalent sun of fuel consumption of diesel engine and electricity consumption of H2/O2 generator, namely can distinguish that its energy consumption, whole consumes were 2.51, 2.58, 2.59, 2.57, 2.60, 2.43, 2.26 and 2.25, respectively. When compared with neat diesel, result showed in H2/O2 from 10 L/min to 40 L/min, diesel equivalent increased while H2/O2 showed increase; but in H2/O2 from 50 L/min to 70 L/min reflected in a gradual decrease in diesel equivalent, indicating that increases in H2/O2 can effectively achieve energy conservation. The result showed that energy conservation was 3.4%, 10.0% and 10.6% for 50 L/min, 60 L/min and 70 L/min, respectively. The result indicated H2/O2 was 60 L/min when energy conservation benefit was most remarkable, therefore this had the best energy conservation.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0623111-181526 |
| Date | 23 June 2011 |
| Creators | Wang, Ying-Lan |
| Contributors | Yuan-Chung Lin, Kang-Shin Chen, Ruei-Min Lin |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0623111-181526 |
| Rights | not_available, Copyright information available at source archive |
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