A novel and optimized operation strategy map for CCHP systems considering optimal thermal energy utilization

Chen, W.D.; Chua, K.J.

doi:10.1016/j.energy.2022.124961

Cited by 16 publications

(2 citation statements)

References 42 publications

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“…The constraints to be met are where W EC,max / W EC,min is the upper/lower limit of the power consumption of the EC; i EC ( t ) is the status flag bit of the EC in the t period, 0 is stop, and 1 is operation; and W EC,up / W EC,low is the upper/lower limit of power consumption ramp rate of EC …”

Section: Mathematical Modelmentioning

confidence: 99%

Research on CCHP Design and Optimal Scheduling Based on Concentrating Solar Power, Compressed Air Energy Storage, and Absorption Refrigeration

Yang,

Zheng,

Chang

2023

ACS Omega

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In response to the country's "carbon neutrality, peak carbon dioxide emissions" task, this paper constructs an integrated energy system based on clean energy. The system consists of three subsystems: concentrating solar power (CSP), compressed air energy storage (CAES), and absorption refrigeration (AR). Among them, thermal energy storage equipment in the photothermal power generation system can alleviate the fluctuation of solar energy and provide a stable power supply for the system. The compression heat generated during the compression process of the CAES system can be recovered through heat transfer oil to provide a heat load. The compressed air in the air accumulator (ACC) expands in the air turbine to provide an electric load. The low-temperature exhaust gas discharged from the turbine can provide cool load. First, a multienergy system that includes CSP, CAES, and AR is built. Then, the system takes the lowest economic cost as the objective function and constructs the system day-ahead scheduling model. Finally, for data obtained from scene reduction, the commercial optimization software Gurobi is invoked through YALMIP to solve the model. The results show that the three subsystems achieve multienergy complementarity; system operating costs are reduced by 59.94% and fully absorb wind and solar energies by the system.

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Section: Mathematical Modelmentioning

confidence: 99%

Research on CCHP Design and Optimal Scheduling Based on Concentrating Solar Power, Compressed Air Energy Storage, and Absorption Refrigeration

Yang,

Zheng,

Chang

2023

ACS Omega

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“…Typically, the system integrates a prime mover and a waste heat recovery system, which can produce multiple utilities. It is noteworthy that employing various operating strategies [47] to optimize the thermal energy utilization efficiency [48][49][50] is not within the scope of this study. It is observed that some waste heat recovery subsystems are purposefully designed to enhance electricity generation performance.…”

Section: System Applications On Waste Heat Recoverymentioning

confidence: 99%

Sustainable energy recovery from thermal processes: a review

2022

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Background With the increasing concerns on the energy shortage and carbon emission issues worldwide, sustainable energy recovery from thermal processes is consistently attracting extensive attention. Nowadays, a significant amount of usable thermal energy is wasted and not recovered worldwide every year. Meanwhile, discharging the wasted thermal energy often causes environmental hazards. Significant social and ecological impacts will be achieved if waste thermal energy can be effectively harnessed and reused. Hence, this study aims to provide a comprehensive review on the sustainable energy recovery from thermal processes, contributing to achieving energy security, environmental sustainability, and a low-carbon future. Main text To better understand the development of waste thermal energy utilization, this paper reviews the sustainable thermal energy sources and current waste energy recovery technologies, considering both waste heat and cold energy. The main waste heat sources are prime movers, renewable heat energy, and various industrial activities. Different waste heat recovery technologies to produce electricity, heating, and cooling are analyzed based on the types and temperatures of the waste heat sources. The typical purposes for waste heat energy utilization are power generation, spacing cooling, domestic heating, dehumidification, and heat storage. In addition, the performance of different waste heat recovery systems in multigeneration systems is introduced. The cold energy from the liquified natural gas (LNG) regasification process is one of the main waste cold sources. The popular LNG cold energy recovery strategies are power generation, combined cooling and power, air separation, cryogenic CO2 capture, and cold warehouse. Furthermore, the existing challenges on the waste thermal energy utilization technologies are analyzed. Finally, potential prospects are discussed to provide greater insights for future works on waste thermal energy utilization. Conclusions Novel heat utilization materials and advanced heat recovery cycles are the key factors for the development of waste high-temperature energy utilization. Integrated systems with multiply products show significant application potential in waste thermal energy recovery. In addition, thermal energy storage and transportation are essential for the utilization of harnessed waste heat energy. In contrast, the low recovery rate, low utilization efficiency, and inadequate assessment are the main obstacles for the waste cold energy recovery systems.

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Operation Strategy and Matching of Supply and Demand of CCHP System with Various Building Types

Li,

Wang,

Peng

et al. 2024

J. Therm. Sci.

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A novel and optimized operation strategy map for CCHP systems considering optimal thermal energy utilization

Cited by 16 publications

References 42 publications

Research on CCHP Design and Optimal Scheduling Based on Concentrating Solar Power, Compressed Air Energy Storage, and Absorption Refrigeration

Research on CCHP Design and Optimal Scheduling Based on Concentrating Solar Power, Compressed Air Energy Storage, and Absorption Refrigeration

Sustainable energy recovery from thermal processes: a review

Operation Strategy and Matching of Supply and Demand of CCHP System with Various Building Types

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