222 Low NOx Emission Technology for Gas Engine Heat Pump

There was a conflict between NOx emission and engine power of modified natural gas engine. Influence facters of NOx emission and emission characteristics of existing modified engine were studied. Emission and engine power of natural gas engine modified from gasoline and diesel engine were compared. Then some sugesstion are brought out for designing low NOx emission natural gas engine and promote engine power.

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Effects of Over Fire Air on the Combustion and NOx Emission Characteristics of a 600 MW Opposed Swirling Fired Boiler

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.512-515.2135 ◽

2012 ◽

Vol 512-515 ◽

pp. 2135-2142 ◽

Cited By ~ 5

Author(s):

Yu Peng Wu ◽

Zhi Yong Wen ◽

Yue Liang Shen ◽

Qing Yan Fang ◽

Cheng Zhang ◽

...

Keyword(s):

Fluid Dynamics ◽

Experimental Data ◽

Empirical Method ◽

Nox Emission ◽

Emission Characteristics ◽

Cfd Model ◽

Nitrogen Release ◽

Computational Fluid Dynamics Cfd ◽

Low Nox Emission

A computational fluid dynamics (CFD) model of a 600 MW opposed swirling coal-fired utility boiler has been established. The chemical percolation devolatilization (CPD) model, instead of an empirical method, has been adapted to predict the nitrogen release during the devolatilization. The current CFD model has been validated by comparing the simulated results with the experimental data obtained from the boiler for case study. The validated CFD model is then applied to study the effects of ratio of over fire air (OFA) on the combustion and nitrogen oxides (NOx) emission characteristics. It is found that, with increasing the ratio of OFA, the carbon content in fly ash increases linearly, and the NOx emission reduces largely. The OFA ratio of 30% is optimal for both high burnout of pulverized coal and low NOx emission. The present study provides helpful information for understanding and optimizing the combustion of the studied boiler

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Exergoeconomic analyses of a gas engine driven heat pump drier and food drying process

Applied Energy ◽

10.1016/j.apenergy.2011.02.001 ◽

2011 ◽

Vol 88 (8) ◽

pp. 2677-2684 ◽

Cited By ~ 36

Author(s):

Aysegul Gungor ◽

Zafer Erbay ◽

Arif Hepbasli

Keyword(s):

Heat Pump ◽

Drying Process ◽

Gas Engine

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Analysis of air-staged combustion of NH3/CH4 mixture with low NOx emission at gas turbine conditions in model combustors

Fuel ◽

10.1016/j.fuel.2018.09.131 ◽

2019 ◽

Vol 237 ◽

pp. 50-59 ◽

Cited By ~ 9

Author(s):

Shan Li ◽

Shanshan Zhang ◽

Hua Zhou ◽

Zhuyin Ren

Keyword(s):

Gas Turbine ◽

Nox Emission ◽

Staged Combustion ◽

Low Nox Emission

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Operating Characteristics of Natural Gas Fueled Homogeneous Charge Compression Ignition Engine

10.1115/imece1999-0856 ◽

1999 ◽

Author(s):

Y. Kawabata ◽

K. Nakagawa ◽

F. Shoji

Keyword(s):

Natural Gas ◽

Homogeneous Charge Compression Ignition ◽

Nox Emission ◽

Compression Ignition ◽

Operating Characteristics ◽

Compression Ignition Engine ◽

Gas Engine ◽

Engine Combustion ◽

Gas Fueled ◽

Homogeneous Charge

Abstract Recently, a new design of engine combustion that achieves higher efficiency and less NOx emission has been proposed. Some researchers have started studying the concept, which is called Homogeneous Charge Compression Ignition (HCCI), but there have been few reports on investigations using a future prospective alternative fuel, natural gas. In this study, natural gas fueled operation of HCCI using a single cylinder gas engine was conducted. Operating and exhaust characteristics were obtained. Experimental data confirmed the potential of higher efficiency and less NOx emission, though THC and CO were higher. Based on these data, the feasibility of this concept for gas engines is also examined.

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