Feasibility of using vapor compression refrigeration system for cooling steam plant condenser

Hegazy, Ahmed; Rothan, Yahya Ali; Engeda, Abraham

doi:10.1016/j.applthermaleng.2016.06.005

Cited by 4 publications

(2 citation statements)

References 10 publications

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“…At present, the common approaches to improve the power generation change rate of thermal power units can include condensate throttling, steam extraction of heating units, refrigerant throttling of condensers, etc. (Hegazy et al, 2016;Zhang et al, 2021;Liu et al, 2023). These methods can greatly improve the dynamic characteristics of thermal power plants, shorten the response time of units, and increase the primary and secondary frequency regulation capabilities through rational utilization of turbine-side energy storage.…”

Section: Introductionmentioning

confidence: 99%

AGC regulation capability prediction and optimization of coal-fired thermal power plants

Jin,

Hao,

Zhang

et al. 2023

Front. Energy Res.

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The improvement of the AGC regulation capability of thermal power plants is very important for the secure and stable operation of the power grid, especially in the situation of large-scale renewable energy access to the power grid. In this study, the prediction and optimization for the AGC regulation capability of thermal power plants is proposed. Firstly, considering parameters related to the AGC regulation of the thermal power plant, the max-relevance and min-redundancy (mRMR) is used to extract features from historical sequences of the parameters. Next, a model with multi-long short-term neural networks (mLSTM) is constructed to predict the AGC regulation capability; that is, the obtained feature set is considered as the inputs of the first LSTM sub-model to predict future values of the main steam pressure and main steam temperature, which are then utilized as the inputs of the second LSTM sub-model to predict the actual power generation during AGC regulation operation. Then, the AGC regulation index is calculated according to the “management rules of grid-connected operation of power plant in Northern China” and “management rules of auxiliary service of the grid-connected power plant in Northern China” (i.e., “two rules”), and it is then considered as the objective function to be maximized by optimizing the coal feed rate, air supply rate, and feedwater flow rate. Finally, the actual AGC regulation process of a 300 MW coal-fired power plant is used as an application, and the results show that the proposed method can effectively predict and improve the regulation capability when the AGC instruction is received from the power grid.

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Section: Introductionmentioning

confidence: 99%

AGC regulation capability prediction and optimization of coal-fired thermal power plants

Jin,

Hao,

Zhang

et al. 2023

Front. Energy Res.

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“…The heat of condensation absorbed by the ammonia is rejected in an air cooled condenser of a refrigeration machine into the surrounding atmosphere. This concept was tested and well documented [11][12][13][14][15][16][17], with the participation of several major equipment vendors (Baltimore Air Coil, the Trane Company, Curtiss-Wright, CB&I, and Union Carbide). In addition, the concept of using vapor compression refrigeration system (VCRS) combined with steam plant condenser was studied in detail in [14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Air Cooling in Steam Plant Condenser Using Refrigeration System for Improving Vacuum Pump Performance

Hegazy¹,

Engeda²

2020

Low-Temperature Technologies

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Modifying the steam plant condenser by incorporating a vapor compression refrigeration system, which is utilized to chill the water used for cooling the condenser air cooler, is proposed in this work. Hence a considerable drop in air temperature is obtained, and more steam associated with air is condensed resulting in reducing both steam lost and vacuum pump power. A thermodynamic analysis is developed for working out the performance of the proposed hybrid system. The results obtained using this analysis showed that for a condensate subcooling of 3°C the total work saving due to this modification has maximums of 38.5, 33.9 and 28.9% and occur at temperature reduction below the condensate temperature of 12, 10, and 8°C when the temperature of steam admitted to the condenser is 20, 30, and 40°C, respectively. The savings in steam lost through the vacuum pump in these cases amount to 87.7, 84, and 79.2%, respectively. It is recommended to select the decrease in condenser air temperature in the range of 4°C higher than those decreases, at which the minimum total work comes about, as the saving in steam lost becomes fairly greater (5-7%), while the maximum increase in minimum total work is 3%.

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Exergoeconomic Analysis of Steam Turbine Driving Vapor Compression Refrigeration System in an Existing Coal-Fired Power Plant

2019

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Feasibility of using vapor compression refrigeration system for cooling steam plant condenser

Cited by 4 publications

References 10 publications

AGC regulation capability prediction and optimization of coal-fired thermal power plants

AGC regulation capability prediction and optimization of coal-fired thermal power plants

Air Cooling in Steam Plant Condenser Using Refrigeration System for Improving Vacuum Pump Performance

Exergoeconomic Analysis of Steam Turbine Driving Vapor Compression Refrigeration System in an Existing Coal-Fired Power Plant

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