A Study of Newly Developed HCCI Engine With Wide Operating Range Equipped With Blowdown Supercharging System

2011 ◽  
Vol 5 (2) ◽  
pp. 51-66 ◽  
Author(s):  
Tatsuya Kuboyama ◽  
Yasuo Moriyoshi ◽  
Koichi Hatamura ◽  
Junichi Takanashi ◽  
Yasuhiro Urata ◽  
...  
Keyword(s):  
Operating Range ◽  
Hcci Engine ◽  
Wide Operating

scholarly journals Dynamic equivalent modeling for power converter based on LSTM neural network in wide operating range

2021 ◽  
Vol 7 ◽  
pp. 477-484
Author(s):  
Yunlu Li ◽  
Guiqing Ma ◽  
Junyou Yang ◽  
Haixin Wang ◽  
Jiawei Feng ◽  
...  
Keyword(s):  
Neural Network ◽  
Power Converter ◽  
Operating Range ◽  
Dynamic Equivalent ◽  
Wide Operating

Experimental evaluation of strategies to increase the operating range of a biogas-fueled HCCI engine for power generation

2012 ◽  
Vol 97 ◽  
pp. 618-629 ◽  
Author(s):  
Iván D. Bedoya ◽  
Samveg Saxena ◽  
Francisco J. Cadavid ◽  
Robert W. Dibble ◽  
Martin Wissink
Keyword(s):  
Power Generation ◽  
Experimental Evaluation ◽  
Operating Range ◽  
Hcci Engine

Extension of Operating Range of a Multi-Cylinder Gasoline HCCI Engine using the Blowdown Supercharging System

2011 ◽  
Vol 4 (1) ◽  
pp. 1150-1168 ◽  
Author(s):  
Tatsuya Kuboyama ◽  
Yasuo Moriyoshi ◽  
Koichi Hatamura ◽  
Junichi Takanashi ◽  
Yasuhiro Urata ◽  
...  
Keyword(s):  
Operating Range ◽  
Hcci Engine

Physical Modeling and Control of a Multi-Cylinder HCCI Engine

2009 ◽  
Author(s):  
Nikhil Ravi ◽  
Matthew J. Roelle ◽  
Hsien-Hsin Liao ◽  
Adam F. Jungkunz ◽  
Chen-Fang Chang ◽  
...  
Keyword(s):  
Direct Injection ◽  
Work Output ◽  
Compression Ignition ◽  
Piston Engine ◽  
Modeling And Control ◽  
Hcci Engine ◽  
Operating Region ◽  
Control Scheme ◽  
And Control ◽  
Wide Operating

Homogeneous charge compression ignition (HCCI) is one of the most promising piston-engine concepts for the future, providing significantly improved efficiency and emissions characteristics relative to current technologies. This paper presents a framework for controlling a multi-cylinder HCCI engine with exhaust recompression and direct injection of fuel into the cylinder. A physical model is used to describe the HCCI process, with the model states being closely linked to the thermodynamic state of the cylinder constituents. Separability between the effects of the control inputs on the desired outputs provides an opportunity to develop a simple linear control scheme, where the fuel is used to control the work output and the valve timings are used to control the phasing of combustion. Experimental results show good tracking of both the work output and combustion phasing over a wide operating region. In addition, the controller is able to balance out differences between cylinders, and reduce the cycle-to-cycle variability of combustion.

Steam Injected Gas Turbine (STIG) for Load Flexible CHP: Aspects of Dynamic Behaviour, Control and Water Recovery

2019 ◽  
Author(s):  
Thorsten Lutsch ◽  
Uwe Gampe ◽  
Guntram Buchheim
Keyword(s):  
Steam Turbine ◽  
Gas Turbine ◽  
Power Plants ◽  
Operating Cost ◽  
Combined Cycle ◽  
System Response ◽  
Water Recovery ◽  
Operating Range ◽  
Demand Fluctuations ◽  
Wide Operating

Abstract Industrial combined heat and power (CHP) plants are often faced with highly variable demand of heat and power. Demand fluctuations up to 50% of nominal load are not uncommonly. The cost and revenue situation in the energy market represents a challenge, also for cogeneration of heat and power (CHP). More frequent and rapid load changes and a wide operating range are required for economic operation of industrial power plants. Maintaining pressure in steam network is commonly done directly by a condensation steam turbine in a combined cycle or indirectly by load changes of the gas turbine in a gas turbine and heat recovery steam generator arrangement. Both result in a change of the electric output of the plant. However, operating cost of a steam turbine are higher than a single gas turbine. The steam injected gas turbine (STIG) cycle with water recovery is a beneficial alternative. It provides an equivalent degree of freedom of power and heat generation. High process efficiency is achieved over a wide operating range. Although STIG is a proven technology, it is not yet widespread. The emphasis of this paper is placed on modeling the system behavior, process control and experiences in water recovery. A dynamic simulation model, based on OpenModelica, has been developed. It provides relevant information on system response for fluctuating steam injection and helps to optimize instrumentation and control. Considerable experience has been gained on water recovery with respect to condensate quality, optimum water treatment architecture and water recovery rate, which is also presented.

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