Effects of operating parameters on steady and transient behaviors of a closed cycle diesel engine

Horng Wen Wu; Chin Tsung Shu

doi:10.1016/j.enconman.2005.12.023

Effects of operating parameters on steady and transient behaviors of a closed cycle diesel engine

Horng Wen Wu, Chin Tsung Shu

Department of Systems and Naval Mechatronic Engineering

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

This study set out to develop the first closed cycle diesel engine (CCDE) system in Taiwan and to study the engine performance under transient and steady operation conditions. The aim of the development was to design and establish these systems, including a cooling system, a CO₂ absorbing system, a charge mixing system and an oxygen control system. The exhaust emissions CO₂ and smoke from the engine were measured and analyzed using different chemical absorbents (KOH, NaOH and Ca(OH)₂) in the CO₂ absorbing system under different injection pressures (155 kg/cm², 185 kg/cm² and 200 kg/cm²) and different electric powers (1 kW, 2 kW and 4 kW). KOH was found to have the best effect on the absorption of CO₂ among the three absorptive liquids (KOH, NaOH and Ca(OH)₂), and it achieved the lowest oscillation of oxygen at a lower electric load. The brake specific fuel consumption (bsfc) with KOH used in the CO₂ absorber was less than that for the two other absorbents. It was found that with increasing injection pressure, the concentration of smoke decreased but both CO₂ concentration and bsfc increased. The concentration of smoke increased, but the bsfc decreased as the electric load increased. The larger the electric load was, the longer it took before the oxygen concentration reached a steady state.

Original language	English
Pages (from-to)	2070-2080
Number of pages	11
Journal	Energy Conversion and Management
Volume	47
Issue number	15-16
DOIs	https://doi.org/10.1016/j.enconman.2005.12.023
Publication status	Published - 2006 Sep 1

All Science Journal Classification (ASJC) codes

Renewable Energy, Sustainability and the Environment
Nuclear Energy and Engineering
Fuel Technology
Energy Engineering and Power Technology

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title = "Effects of operating parameters on steady and transient behaviors of a closed cycle diesel engine",

abstract = "This study set out to develop the first closed cycle diesel engine (CCDE) system in Taiwan and to study the engine performance under transient and steady operation conditions. The aim of the development was to design and establish these systems, including a cooling system, a CO2 absorbing system, a charge mixing system and an oxygen control system. The exhaust emissions CO2 and smoke from the engine were measured and analyzed using different chemical absorbents (KOH, NaOH and Ca(OH)2) in the CO2 absorbing system under different injection pressures (155 kg/cm2, 185 kg/cm2 and 200 kg/cm2) and different electric powers (1 kW, 2 kW and 4 kW). KOH was found to have the best effect on the absorption of CO2 among the three absorptive liquids (KOH, NaOH and Ca(OH)2), and it achieved the lowest oscillation of oxygen at a lower electric load. The brake specific fuel consumption (bsfc) with KOH used in the CO2 absorber was less than that for the two other absorbents. It was found that with increasing injection pressure, the concentration of smoke decreased but both CO2 concentration and bsfc increased. The concentration of smoke increased, but the bsfc decreased as the electric load increased. The larger the electric load was, the longer it took before the oxygen concentration reached a steady state.",

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