A Combined Power Cycle Using Refuse Incineration and LNG Cold Energy With Use of Regasified LNG

2009 ◽  
Author(s):  
Hamid Mahdavi ◽  
Mosa Meratizaman ◽  
S. Ali Jazayeri
Keyword(s):  
Power Generation ◽  
Parametric Analysis ◽  
Rankine Cycle ◽  
Combined Cycle ◽  
Power Cycle ◽  
Energy Cycle ◽  
Cold Energy ◽  
Generation Cycle ◽  
Power Generation Cycle ◽  
Refuse Incineration

The objectives of this paper are to develop a combined power generation cycle using refuse incineration and LNG cold energy, and to conduct parametric analysis to investigate the effects of key parameters on the thermal and exergy efficiencies. The combined cycle consists of an ammonia–water Rankine cycle with refuse incinerator and a LNG cold energy cycle with use of regasified LNG as the extra fuel in the incinerator. The combined cycle is compared with the conventional steam Rankine cycle.

Thermodynamic Analysis of Hydrogen Combustion Turbine Cycles

2001 ◽  
Author(s):  
Umberto Desideri ◽  
Piergiacomo Ercolani ◽  
Jinyue Yan
Keyword(s):  
Power Generation ◽  
Thermodynamic Analysis ◽  
Clean Energy ◽  
Energy System ◽  
Combined Cycle ◽  
World Energy ◽  
Generation Cycle ◽  
Set Up ◽  
Power Generation Cycle ◽  
Energy Network

The “International Clean Energy System Technology Utilizing Hydrogen (World Energy Network)”: WE-NET is a research program directed at the development of the technologies needed build a hydrogen-based energy conversion system. It proposes to set up a world energy network to convert renewable energy, such as hydropower and solar energy, into a secondary and transportable form to supply the demand centers, and to make possible the utilization of existing power generation, transportation, town gas, etc. Within the framework of this program Mitsubishi Heavy Industries, Hitachi and Westinghouse Power Corporation are working to develop an hydrogen-fueled combustion turbine system designed to meet the goals set by the WE-NET Program. The hydrogen–fueled power generation cycle will be able to satisfy the requirements of an efficiency based on the lower heating value higher than 70% and of reliability, availability and maintainability equivalent to current base-loaded natural gas-fired combined cycle. The use of hydrogen will eliminate emissions of CO2 and SOx and significantly reduce those of NOx. This paper presents a thermodynamic analysis of some concepts of hydrogen fuelled cycles which have been studied in the WE-NET program and makes a comparison of their performance.

Process Simulations of the Cold Recovery Unit in a LNG CCHP System with Different Power Cycles

2011 ◽  
Vol 90-93 ◽  
pp. 3026-3032
Author(s):  
Heng Sun ◽  
Hong Mei Zhu ◽  
Hong Wei Liu
Keyword(s):  
Energy Efficiency ◽  
High Efficiency ◽  
Rankine Cycle ◽  
Primary Energy ◽  
Combined Cycle ◽  
Power Cycles ◽  
Power Cycle ◽  
Recovery Unit ◽  
Cold Energy ◽  
Cooling Media

A CCHP system using LNG as the primary energy should integrate cold recovery unit to increase the total energy efficiency. A scheme of CCHP consisting of gas turbine-steam turbine combined cycle, absorption refrigeration unit, cold recovery unit and cooling media system is a system with high efficiency and operation flexibility. Three different power cycles using the cold energy of LNG is(are 或 were) presented and simulated. The results show that the cascade Rankine power cycle using ethylene and propane in the two cycles respectively has highest energy efficiency. However, the unit is most complex. The efficiency of ethylene Rankine power cycle is little lower than the cascade one, and is much higher than the traditional propane Rankine cycle. The complexity of ethylene cycle is identical to that of the propane cycle. The ethylene Rankine power cycle is the referred method of cold recovery in a CCHP system based on overall considerations.

Thermodynamic Analysis of a Combined Power and Water Production System

2010 ◽  
Author(s):  
S. Ehsan Shakib ◽  
Majid Amidpour ◽  
Cyrus Aghanajafi
Keyword(s):  
Power Generation ◽  
Water Cycle ◽  
Performance Ratio ◽  
Water Production ◽  
Exergy Destruction ◽  
Combined System ◽  
Dual Purpose ◽  
Destruction Rate ◽  
Generation Cycle ◽  
Power Generation Cycle

Most of the potable water and electricity are produced by dual purpose plants. Dual-purpose plants are the one that supplies heat for a thermal desalination unit and produces electricity for distribution to the electrical grid. In this paper a power plant is combined with a multi-effect evaporation thermal vapor compression (METVC) system. Compared with the most widely used (Multi Stage Flash) MSF desalination, METVC has more advantages. Then, energy and exergy analysis equations for desalination plant, power generation cycle, heat recovery steam generator and combined power and water cycle are developed and the results are presented. Results show by rising number of effect from 2 to 14, performance ratio, exergy efficiency and specific heat transfer area rise steadily. For combined system, the maximum and minimum values of exergy destruction rate are related to combustion chamber and desalination effects, respectively. Also, with increasing TIT, exergy destruction rate of power generation cycle decreases while the exergy destruction rate of METVC, especially thermo compressor, goes up and fresh water production reduces dramatically.

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