Analysis of energy matching performance between CCHP systems and users based on different operation strategies

Feng, Lejun; Dai, Xiaoye; Mo, Junrong; Ma, Yuezheng; Shi, Lin

doi:10.1016/j.enconman.2018.12.006

Cited by 44 publications

(8 citation statements)

References 46 publications

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“…With the aim to evaluate the RE-CCHP system performance comprehensively, some studies focused on the optimization of CCHP systems, were simultaneously performed concerning the energetic, economic, environmental protection, and social aspects. The primary energy consumption (PEC), primary energy rate (PER), primary energy saving (PES), fuel energy saving ratio (FESR), energy-efficiency, operation cost (OC), total cost rate (TCR), annual total cost saving (ATC), energy cost, exergetic efficiency and gross benefit, as well as carbon dioxide emissions cost (CDEC) [7][8][9][10] have been often employed to evaluate comprehensively the technical performance of RE-CCHP systems. Kang et al [11] compared three operational modes to analyze the benefits of a CCHP system based on primary energy consumption, carbon dioxide emissions, annual total cost and system efficiency.…”

Section: Figure 1 Accumulative Installed Capacity and Proportion Of Wind And Pv Power In China From 2011 To 2019mentioning

confidence: 99%

“…After years of operation experience, a RE-CCHP system usually takes into account the economy, energy efficiency, and environmental protection of the system. The RE-CCHP system adopts the following two operation modes: FEL and FTL [27].…”

Section: Operating Strategy Of Re-cchp Systemmentioning

confidence: 99%

“…The demand for domestic hot water is higher, because hot water is less affected by seasonal weather changes, and there is a demand for hot water use during all the seasons. The basic electricity load of the building is stable during the whole year [27].…”

Section: B Building Description and Energy Demandsmentioning

confidence: 99%

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Notice of Retraction: A hybrid fuzzy multiple criteria decision-making approach for comprehensive performance research and evaluation of RE-CCHP system

Yang¹,

Maihemuti

et al. 2024

IEEE Access

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The combined cooling heating and power (CCHP) systems have been drawing high attention due to its energy-saving, environmentally friendly, and cost-saving characteristics. In order to utilize the abundant renewable energies (RE) efficiently, and meet the demand of diversity of energy uses, RE is proposed to realize a CCHP system. However, various forms of energy use can lead to complex control and higher cost. Therefore, new methods are needed to evaluate the advantages and disadvantages of a renewable energies based on CCHP, called RE-CCHP system. In this paper, one of the buildings in Western China is selected as a research object, and the separate power (SP) system and CCHP system are taken as references. Twenty-six different indexes of a RE-CCHP system are constructed based on the environment, society, economy, and technology criteria. Simultaneously, the subjective and objective weights of the indexes are calculated by using the fuzzy decision-making trial and evaluation laboratory and anti-entropy weight (Fuzzy-DEMATEL-AEW), respectively. Then, the comprehensive weights are calculated using the matrix theory. As a result, the important indexes and two operation modes (FEL and FTL) of different systems are compared and analyzed according to the the comprehensive weight value. Meanwhile, the VIKOR method is used to evaluate and analyze the performance of three systems. At the end, sensitivity analysis is carried out to illustrate the rationality and feasibility of the proposed method.

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Section: Figure 1 Accumulative Installed Capacity and Proportion Of Wind And Pv Power In China From 2011 To 2019mentioning

confidence: 99%

Section: Operating Strategy Of Re-cchp Systemmentioning

confidence: 99%

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Notice of Retraction: A hybrid fuzzy multiple criteria decision-making approach for comprehensive performance research and evaluation of RE-CCHP system

Yang¹,

Maihemuti

et al. 2024

IEEE Access

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“…Combined cooling, heating, and power systems (CCHP) are efficient and eco-friendly energy systems with reduced energy consumption and greenhouse gas emissions. By introducing energy storage units (ESUs) into CCHP systems, the energy mismatch between the supply from CCHP systems and the demand of users could be alleviated and the CCHP systems are able to operate stably with reduced capacities [1,2,3]. Phase change materials, with high thermal storage density and isothermal operation, are expected to be used as short-term storage in CCHP systems to further improve the energy efficiency by the rational distribution of thermal energy in time and space.…”

Section: Introductionmentioning

confidence: 99%

Stearic Acid/Inorganic Porous Matrix Phase Change Composite for Hot Water Systems

Yang

2019

Molecules

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The storage and utilization of waste heat in low and medium temperature ranges using phase change materials (PCMs) is an effective technology to improve energy utilization efficiency in combined cooling, heating, and power (CCHP) systems. In this paper, stearic acid/inorganic porous matrix phase change composites were developed to store waste heat for hot water systems. Among them, stearic acid/expanded graphite (EG) phase change composite was highlighted and the thermal physical properties, the dynamic response, and the long-term cyclic stability were evaluated. The stearic acid concentrations in the composites were over 95 wt%. The thermal diffusion coefficients were 3–5 times higher than pure stearic acid, independent of composite densities. Accordingly, the heat storage and release times were decreased by up to 41% and 55%, respectively. After 100 cycles, the composites maintained good dynamic response and long-term cyclic stability, with heat storage density of 122–152 MJ/m3. Hence, this stearic acid/EG phase change composite exhibits excellent comprehensive performances. It is also easy to be prepared and flexible for various types of heat exchangers.

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“…However, the basic operation mode, including following thermal load (FTL) and following electric load (FEL), has limited ability to optimize the system operation. Wang et al [17] proposed an improved FEL operation strategy and Feng et al [18] proposed an improved hybrid load tracking method (FHL) based on a comparison between FEL and FTL strategies. Ma et al developed a seasonal operation strategy for a new distributed energy system integrating CCHP, photovoltaics, and a ground source heat pump (GSHP), which improved the system performance index [19].…”

Section: Introductionmentioning

confidence: 99%

Collaborative Optimization of Multi-Energy Complementary Combined Cooling, Heating, and Power Systems Considering Schedulable Loads

et al. 2020

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Combined cooling, heating, and power (CCHP) systems are a promising energy-efficient and environment-friendly technology. However, their performance in terms of energy, economy, and environment factors depends on the operation strategy. This paper proposes a multi-energy complementary CCHP system integrating renewable energy sources and schedulable heating, cooling, and electrical loads. The system uses schedulable loads instead of energy storage, at the same time, a collaborative optimization scheduling strategy, which integrates energy supply and load demand into a unified optimization framework to achieve the optimal system performance, is presented. Schedulable cooling and heating load models are formulated using the relationship between indoor and outdoor house temperatures. A genetic algorithm is employed to optimize the overall performance of energy, economy, and environment factors and obtain optimal day-ahead scheduling scheme. Case studies are conducted to verify the efficiency of the proposed method. Compared with a system involving thermal energy storage and demand response (DR), the proposed method exhibits a higher primary energy saving rate, greenhouse gas emission reduction rate, and operation costs saving rate of 7.44%, 6.59%, and 4.73%, respectively, for a typical summer day, thereby demonstrating the feasibility and superiority of the proposed approach.

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Analysis of energy matching performance between CCHP systems and users based on different operation strategies

Cited by 44 publications

References 46 publications

Notice of Retraction: A hybrid fuzzy multiple criteria decision-making approach for comprehensive performance research and evaluation of RE-CCHP system

Notice of Retraction: A hybrid fuzzy multiple criteria decision-making approach for comprehensive performance research and evaluation of RE-CCHP system

Stearic Acid/Inorganic Porous Matrix Phase Change Composite for Hot Water Systems

Collaborative Optimization of Multi-Energy Complementary Combined Cooling, Heating, and Power Systems Considering Schedulable Loads

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