scholarly journals Thermodynamic Performance Characterictics of a Tri-Cogeneration System Based on Kalina Cycle Driven by Renewable Energy

2021 ◽  
Vol 32 (6) ◽  
pp. 649-655
Author(s):  
CHUL-HO HAN ◽  
KYOUNG-HOON KIM ◽  
YOUNG-GUAN JUNG
Keyword(s):  
Renewable Energy ◽  
Kalina Cycle ◽  
Thermodynamic Performance ◽  
Cogeneration System

The many-objective optimal design of renewable energy cogeneration system

Energy ◽  
2021 ◽  
pp. 121244
Author(s):  
Yi He ◽  
Su Guo ◽  
Jianxu Zhou ◽  
Feng Wu ◽  
Jing Huang ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Optimal Design ◽  
Cogeneration System ◽  
The Many

Analysis of the Thermodynamic Performance of Kalina Cycle System 11 (KCS11) for Geothermal Power Plant: Comparison With Kawerau ORMAT Binary Plant

2009 ◽  
Author(s):  
Xinli Lu ◽  
Arnold Watson ◽  
Joe Deans
Keyword(s):  
Power Generation ◽  
Power Plant ◽  
Heat Source ◽  
Gas Turbines ◽  
Effective Means ◽  
Specific Power ◽  
Kalina Cycle ◽  
Geothermal Power Plant ◽  
Thermodynamic Performance ◽  
Geothermal Power

Since the first geothermal power plant was built at Larderello (Italy) in 1904, many attempts have been made to improve conversion efficiency. Among innovative technologies, using the Kalina cycle is considered as one of the most effective means of enhancing the thermodynamic performance for both high and low temperature heat source systems. Although initially used as the bottoming cycle of gas turbines and diesel engines, in the late 1980s the Kalina cycle was found to be attractive for geothermal power generation [1, 2, 3]. Different versions (KSC11, KSC12 and KSC13) were designated. Comparison between Kalina cycle and other power cycles can be found in later studies [4, 5, 6]. Here we examine KSC11, because it is specifically designed for geothermal power generation, with lower capital cost [3]. We compare this design with the existing Kawerau ORMAT binary plant in New Zealand. In addition, parametric sensitivity analysis of KCS11 has been carried out for the specific power output and net thermal efficiency by changing the temperatures of both heat source and heat sink for a given ammonia-water composition.

Thermodynamic Analysis of a Novel Ammonia-Water Cogeneration System for Maritime Diesel Engines

2020 ◽  
Author(s):  
Ziyang Cheng ◽  
Yaxiong Wang ◽  
Qingxuan Sun ◽  
Jiangfeng Wang ◽  
Pan Zhao ◽  
...  
Keyword(s):  
Power Output ◽  
Thermal Efficiency ◽  
System Performance ◽  
Mass Fraction ◽  
Ammonia Concentration ◽  
Working Fluid ◽  
Fluid Temperature ◽  
Kalina Cycle ◽  
Ammonia Water ◽  
Cogeneration System

Abstract This paper proposes a novel cogeneration system based on Kalina cycle and absorption refrigeration system to meet the design requirements of China State Shipbuilding Corporation, which is efficiently satisfy the power and cooling demands of a maritime ship at the same time. Unlike most of the combined systems, this cogeneration system is highly coupled and realizes cogeneration without increasing the system complexity too much. The basic ammonia mass fraction of this novel system is increased, so that the ammonia concentration of ammonia-water steam from the separator can be higher, which contributes to lower refrigerating temperature and thus less heat loss in the distillation process. In addition, higher ammonia concentration solution makes overheating easier, which improves the thermal efficiency. Moreover, the system has two recuperators to make further improvement of the thermal efficiency. Thermodynamic models are developed to investigate the system performance and parametric analysis is conducted to figure out the effects of including working fluid temperature at the outlet of the evaporator, working fluid temperature at superheater outlet, mass fraction of ammonia in basic solution, turbine inlet pressure, temperature of cooling water at the inlet of condensers and the refrigeration evaporation temperature on the system performance. Furthermore, the cogeneration system is optimized with genetic algorithm to obtain the best performance, which achieves 333.00kW of net power output, 28.83 kW of cooling capacity and 21.81% of thermal efficiency. Finally, the performance of the proposed system is compared with an optimized recuperative organic Rankine cycle (ORC) system and an optimized Kalina cycle system 34 (KCS34) using the same heat source. The results show that the thermal efficiency and power output of the novel cogeneration system is 3.89% and 1.05% higher than that of the recuperative ORC system and KCS34 system respectively.

scholarly journals Comparative Thermodynamic Analysis of Kalina and Kalina Flash Cycles for Utilizing Low-Grade Heat Sources

Energies ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 3311 ◽  
Author(s):  
Kyoung Kim ◽  
Chul Han ◽  
Hyung Ko
Keyword(s):  
Mass Fraction ◽  
Power Production ◽  
Low Grade ◽  
Heat Sources ◽  
Kalina Cycle ◽  
Thermodynamic Performance ◽  
Locally Maximal ◽  
The Difference ◽  
Proposed Modification ◽  
Low Grade Heat

The Kalina flash cycle (KFC) is a novel, recently proposed modification of the Kalina cycle (KC) equipped with a flash vessel. This study performs a comparative analysis of the thermodynamic performance of KC and KFC utilizing low-grade heat sources. How separator pressure, flash pressure, and ammonia mass fraction affect the system performance is systematically and parametrically investigated. Dependences of net power and cycle efficiencies on these parameters as well as the mass flow rate, heat transfer rate and power production at the cycle components are analyzed. For a given set of separator pressure and ammonia mass fraction, there exists an optimum flash pressure making exergy efficiency locally maximal. For these pressures, which are higher for higher separator pressure and lower ammonia mass fraction, KFC shows better performance than KC both in net power and cycle efficiencies. At higher ammonia mass fraction, however, the difference is smaller. While the maximum power production increases with separator pressure, the dependence is quite weak for the maximum values of both efficiencies.

scholarly journals The Effect of Thermal Matching on the Thermodynamic Performance of Gas Turbine and IC Engine Cogeneration Systems

1985 ◽  
Author(s):  
J. W. Baughn ◽  
N. Bagheri
Keyword(s):  
Gas Turbine ◽  
Combustion Engine ◽  
Full Range ◽  
Operating Conditions ◽  
Hot Water ◽  
Ic Engine ◽  
Thermal Output ◽  
Savings Rate ◽  
Thermodynamic Performance ◽  
Cogeneration System

Computer models have been used to analyze the thermodynamic performance of a gas turbine (GT) cogeneration system and an internal combustion engine (IC) cogeneration system. The purpose of this study was to determine the effect of thermal matching of the load (i.e., required thermal energy) and the output steam fraction (fraction of the thermal output, steam and hot water, which is steam) on the thermodynamic performance of typical cogeneration systems at both full and partial output. The thermodynamic parameters considered were; the net heat rate (NHR), the power to heat ratio (PHR), and the fuel savings rate (FSR). With direct use (the steam fractions being different); the NHR of these two systems is similar at full output, the NHR of the IC systems is lower at partial output, and the PHR and the FSR of the GT systems is lower than the IC systems over the full range of operating conditions. With thermal matching (to produce a given steam fraction) the most favorable NHR, PHR, and FSR depends on the method of matching the load to the thermal output.

Predicted Performance of an Integrated Solar Thermal and Photovoltaic System With Hybrid Turbine-Fuel Cell Cogeneration System

2008 ◽  
Author(s):  
Gregory J. Kowalski ◽  
Mansour Zenouzi
Keyword(s):  
Carbon Dioxide ◽  
Renewable Energy ◽  
Fuel Cell ◽  
Energy Systems ◽  
Energy Utilization ◽  
Solar Thermal ◽  
System Level ◽  
Energy Requirements ◽  
Cogeneration System ◽  
And Storage

A general approach, the HLRP technique, for determining the performance of a hybrid turbine-fuel cell cogeneration system with a renewable energy sources is presented for a domestic residence. The hybrid-cogeneration system provides the electric power as well as satisfying heating loads. In this paper a system level analysis that includes practical values of heat exchangers, pumps, and storage equipment is presented. The use of the ratio of the thermal load to required power parameter (HLRP), which has been used by the authors to scale energy systems, allows the performance to be quickly determined and preliminary carbon dioxide production rates and cost effects to be estimated. The present paper includes solar energy systems as renewable energy to illustrate the development of this technique and its integration with the hybrid fuel cell cogeneration system. Practical values of solar collector efficiency and storage tank and battery storage efficiency are included. The analysis focused on matching the transient characteristics of the power and thermal loads with those of the renewable energy system. The results demonstrate that for a typical winter day in the location studied there are not large variations in the energy utilization factors for the four different systems investigated. There is a 23% reduction in the carbon dioxide produced using the solar thermal or combined system as compared to the no renewable energy or photovoltaic systems. The information provided by the performance graphs is used to estimate costs for each system and to easily determine which system is the most efficient for satisfying energy requirements and reducing green house gas emissions. The results provide site planners and physical plant operators with initial information that can be used to design new facilities or effectively integrate large plant expansion that include renewable energy systems in a manner that will minimize energy requirements and reduce pollution effects.

Predicted Performance of an Integrated Solar Thermal and Photovoltaic System With Hybrid Turbine-Fuel Cell Cogeneration System With Cooling Loads

2008 ◽  
Author(s):  
Gregory J. Kowalski ◽  
Mansour Zenouzi
Keyword(s):  
Carbon Dioxide ◽  
Renewable Energy ◽  
Fuel Cell ◽  
Renewable Energy Sources ◽  
Energy Systems ◽  
Energy Utilization ◽  
Photovoltaic System ◽  
Energy Requirements ◽  
Cogeneration System ◽  
Cooling Loads

A general approach, the HLRP technique, for determining the performance of a hybrid turbine-fuel cell cogeneration system with a renewable energy sources is presented for a domestic residence for a summer day with cooling loads. The use of the ratio of the thermal load to required power parameter (HLRP), which scales the energy systems, allows the performance to be quickly determined and preliminary carbon dioxide production rates and cost effects to be estimated. The present paper includes solar energy systems, thermal and photovoltaic, as renewable energy to illustrate the development of this technique and its integration with the hybrid fuel cell cogeneration system. The analysis focused on matching the transient characteristics of the power and thermal loads with those of the renewable energy system. The results demonstrate that for a typical summer day in the location studied there are not large variations in the energy utilization factors for the four different systems investigated. Surprisingly, the photovoltaic system produces the lowest first law performance and the largest amounts of carbon dioxide. This observation points out the complexity of these systems. The explanation illustrates that saving power production while increasing the use of the most inefficient device (the furnace) decreases the system performance. The information provided by the performance graphs is used to estimate costs for each system and to easily determine which system is the most efficient for satisfying energy requirements and reducing green house gas emissions. The results provide site planners and physical plant operators with initial information that can be used to design new facilities or effectively integrate large plant expansion that include renewable energy systems in a manner that will minimize energy requirements and reduce pollution effects.

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