Effective Energy Utilization and Emission Reduction of Exhaust Gas in a Two-Stroke Cycle Engine — Part II

1993 ◽  
Author(s):  
Kazuo Sato ◽  
Masamitsu Nakano ◽  
Haruo Ukawa
Keyword(s):  
Emission Reduction ◽  
Energy Utilization ◽  
Exhaust Gas ◽  
Effective Energy ◽  
Engine Part ◽  
Stroke Cycle

Recovering waste energy of the combined gas turbine system using paraffin melting

2020 ◽  
Vol 14 (4) ◽  
pp. 7481-7497
Author(s):  
Yousef Najjar ◽  
Abdelrahman Irbai
Keyword(s):  
Melting Process ◽  
Payback Period ◽  
Energy Utilization ◽  
Raw Material ◽  
Heat Transfer Fluid ◽  
Layered System ◽  
Exhaust Gas ◽  
Gas Temperature ◽  
Power Cycle ◽  
Waste Energy

This work covers waste energy utilization of the combined power cycle by using it in the candle raw material (paraffin) melting process and an economic study for this process. After a partial utilization of the burned fuel energy in a real bottoming steam power generation, the exhaust gas contains 0.033 of the initially burned energy. This tail energy with about 128 ºC is partly driven in the heat exchanger of the paraffin melting system. Ansys-Fluent Software was used to study the paraffin wax melting process by using a layered system that utilizes an increased interface area between the heat transfer fluid (HTF) and the phase change material (PCM) to improve the paraffin melting process. The results indicate that using 47.35 kg/s, which is 5% of the entire exhaust gas (881.33 kg/s) from the exit of the combined power cycle, would be enough for producing 1100 tons per month, which corresponds to the production quantity by real candle's factories. Also, 63% of the LPG cost will be saved, and the payback period of the melting system is 2.4 years. Moreover, as the exhaust gas temperature increases, the consumed power and the payback period will decrease.

A Converted Two-Stroke Cycle Engine for Compression Ignition Combustion

2014 ◽  
Vol 663 ◽  
pp. 331-335 ◽  
Author(s):  
Amin Mahmoudzadeh Andwari ◽  
Azhar Abdul Aziz ◽  
Mohd Farid Muhamad Said ◽  
Zulkarnain Abdul Latiff
Keyword(s):  
Internal Combustion Engines ◽  
Exhaust Gas Recirculation ◽  
Exhaust Emissions ◽  
Exhaust Gas ◽  
Cyclic Variation ◽  
Cyclic Variability ◽  
Auto Ignition ◽  
Compression Ignition Combustion ◽  
Gas Recirculation ◽  
Stroke Cycle

A new kind of alternative combustion concept that has attracted attention intensively in recent years is called controlled auto-ignition (CAI) combustion. CAI combustion has been proposed and partially implemented with the aim of both improving the thermal efficiency of internal combustion engines, achieving cleaner exhaust emissions and lower cyclic variation. An experimental study is conducted through a CAI two-stroke cycle engine in order to investigate the influence of internal exhaust gas recirculation (In-EGR) and external exhaust gas recirculation (Ex-EGR) variation in relation to combustion cyclic variability and exhaust emissions characteristics. Results implied that cyclic variation of both combustion-related and pressure-related parameter is substantially improved. Furthermore remarkable decreased exhaust emissions, unburned hydrocarbon (uHC), carbon monoxide (CO) and nitric dioxide (NOX), was observed.

Prospects for Diesel Exhaust Energy Utilization Aboard Great Lakes Bulk Carriers

1978 ◽  
Vol 15 (03) ◽  
pp. 287-296
Author(s):  
John B. Woodward
Keyword(s):  
Great Lakes ◽  
Diesel Exhaust ◽  
Waste Heat ◽  
Energy Utilization ◽  
Exhaust Gas ◽  
Detailed Consideration ◽  
Fuel Prices ◽  
Bulk Carriers ◽  
Exhaust Energy ◽  
Economic Analyses

The rise of fuel prices above their traditional levels suggests that the thermal energy in diesel exhaust gas ("waste heat") should be used by the Great Lakes ships in a manner similar to established ocean practice. This paper discusses the important generalities in this use, the magnitude of the energy source from several Great Lakes propulsion engines, and then outlines two schemes for its application by a self-unloading ore carrier of contemporary design. Brief economic analyses show that one scheme is attractive enough to justify more detailed consideration of its use in future ships.

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