The use of pressure hot water storage tanks to improve the energy flexibility of the steam power unit

Trojan, Marcin; Taler, Dawid; Dzierwa, Piotr; Taler, Jan; Kaczmarski, Karol; Wrona, Jan

doi:10.1016/j.energy.2019.02.059

Cited by 55 publications

(8 citation statements)

References 7 publications

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“…They develop a method to quantify the energy-flexibility potential based on mathematical optimization models [23]. Trojan et al suggest the implementation of hot water storage to increase the energy flexibility of steam power systems [24]. Wang et al quantify the storage potential of an industrial steam supply system by dynamic modeling in Modelica [25].…”

Section: Related Workmentioning

confidence: 99%

Investigating the Electrical Demand-Side Management Potential of Industrial Steam Supply Systems Using Dynamic Simulation

et al. 2021

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The increasing share of volatile, renewable energies, such as wind and solar power, leads to challenges in the stabilization of power grids and requires more flexibility in future energy systems. This article addresses the flexibilization of the consumer side and presents a simulation-based method for the technical and economic investigation of energy flexibility measures in industrial steam supply systems. The marketing of three different energy-flexibility measures—bivalence, inherent energy storage and adjusting process parameters—both at the spot market and at the balancing power market, are investigated from a technical as well as an economic point of view. Furthermore, the simulation-based methodology also considers pressure and temperature fluctuation induced by energy-flexibility measures. First, different energy-flexibility measures for industrial steam supply systems are introduced. Then, the physical modeling of the steam generation, distribution, and consumption as well as measure-specific control strategies will be discussed. Finally, the methodology is applied to a steam supply system of a chemical company. It is shown that the investigated industrial steam supply system shows energy-flexibility potentials up to 10 MW at peak and an annual average of 5.6 MW, which highly depend on consumer behavior and flexibility requirements.

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Section: Related Workmentioning

confidence: 99%

Investigating the Electrical Demand-Side Management Potential of Industrial Steam Supply Systems Using Dynamic Simulation

et al. 2021

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“…Cao et al 27 proposed a hybrid system of integrating high‐temperature TES system into a coal‐fired power plant (called HTTES‐aided coal‐fired power plant) through additional thermodynamic cycle and found the load flexibility is improved. Trojan et al 28 integrated the hot water storage tank on a 200 MW coal‐fired unit, reducing the dynamic boiler response time and improving the unit's peaking flexibility. Angerer et al 29 proposed a strategy to improve the thermal energy utilization efficiency of the system by introducing a sensible heat storage system between the thermal decoupling of the gas turbine and the waste heat steam generator during the start‐up and shutdown of a combined cycle gas turbine unit.…”

Section: Introductionmentioning

confidence: 99%

A novel thermal power unit with feedwater pump turbine driven by thermal energy storage system: System construction and performance evaluation

Cao

Zhang

Zhao

et al. 2022

Intl J of Energy Research

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Summary The rapid development of renewable energy power generation brings the strong demand of load regulation capacity for the coal‐fired thermal power unit. This paper presents a novel approach to improving its operational flexibility with a feedwater pump turbine driven by a thermal energy storage (TES) system. The purpose of this study is to investigate the feasibility of the proposed system and evaluate its system performance. During energy charging process, some steam is extracted from hot reheat pipe to heat the TES system and reduce the power generation. During energy discharging process, the feedwater pump turbine is driven by the steam generated from the stored heat instead of extracting from the main turbine. Performance evaluation was conducted based on a model of a 660 MW supercritical thermal power unit. The results show that a low TES outlet steam temperature during the charging process should be employed and extracting water from the pipe between condenser and No. 8 heater during the discharging process should be adopted. The peak regulation range can be expanded from (198‐660 MW) to (188.41‐685.15 MW) without charging the boiler load rate. Hence, the proposed novel system is demonstrated to be an effective way for flexibility improvement of thermal power unit.

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“…Excavating the peak shaving capacity of CHP units is a crucial measure to promote the consumption of renewable power generation [1]. To solve the above problems, a large number of scholars have carried out heat-power decoupling technology research, Energies 2022, 15, 9337 2 of 21 such as coupling electric boiler heating [2][3][4], coupled heat pump heating [5][6][7], additional heat storage equipment [8,9], high back-pressure heat supply transformation [10,11], lowpressure cylinder cut-out heating transformation [12] and bypass heating [13] technologies, the peak shaving ability of CHP units has been improved.…”

Section: Introductionmentioning

confidence: 99%

Optimal Multi-Mode Flexibility Operation of CHP Units with Electrode Type Electric Boilers: A Case Study

Dong

et al. 2022

Energies

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With the in-depth development of flexibility retrofit in combined heat and power (CHP) units, the unit commitment mode of energy supply equipment in CHP plants is more flexible. This paper presents a multi-mode flexible operation method for CHP plants with electrode electric boilers. Firstly, a simulation model of the operation characteristics of each unit in different operation modes is established, and the corresponding features of electrical and thermal outputs are obtained. Subsequently, a decision-making model of the unit commitment mode of energy supply equipment is set up, and the selection rules of the unit commitment mode of the unit under low heat load, medium heat load, and high heat load are achieved. Finally, under different unit operation combinations, a plant-level optimum load dispatch model is obtained, and the actual operating data of the CHP plant is used for optimization and comparison analysis. The results show that compared to the unit commitment mode of high back pressure and low-pressure cylinder cutting-off (HBP + LPCC), the unit commitment mode of high back pressure and extraction heating (HBP + EH) has more room for energy-saving optimization. Under the premise of safe and reliable operation, the high back pressure (HBP) unit can be loaded as much as possible. While in the combined operating of HBP + EH, the energy-saving space for optimized load dispatching is not large, so a fixed proportion of the electrical load may be considered; under the auxiliary service subsidy policy, the input power of the electric boiler can be appropriately increased; the greater the heat load of the whole plant, the more pronounced the energy-saving effect of optimum load dispatch.

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The use of pressure hot water storage tanks to improve the energy flexibility of the steam power unit

Cited by 55 publications

References 7 publications

Investigating the Electrical Demand-Side Management Potential of Industrial Steam Supply Systems Using Dynamic Simulation

Investigating the Electrical Demand-Side Management Potential of Industrial Steam Supply Systems Using Dynamic Simulation

A novel thermal power unit with feedwater pump turbine driven by thermal energy storage system: System construction and performance evaluation

Optimal Multi-Mode Flexibility Operation of CHP Units with Electrode Type Electric Boilers: A Case Study

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