Performance assessment of hybrid chiller systems for combined cooling, heating and power production

Ahn, Hyeunguk; Rim, Donghyun; Freihaut, James D.

doi:10.1016/j.apenergy.2018.05.045

Cited by 41 publications

(5 citation statements)

References 44 publications

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“…In addition, the results suggested the interest of cooling production in single-effect absorption chillers, and to a lesser extent in double-effect absorption chillers, as long as they were driven by cogenerated heat. This is in agreement with the findings by Ahn et al [65] about a hybrid electric-absorption chiller in a gas engine-based CCHP system.…”

Section: Optimal Operation Of the Cchp Systemsupporting

confidence: 93%

Tackling thermal integration in the synthesis of polygeneration systems for buildings

Pina

Lozano²,

Ramos³

et al. 2020

Applied Energy

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A novel methodology is proposed for the synthesis of polygeneration systems in tertiary sector buildings with detailed thermal integration. The methodology involves a systematic approach that combines Pinch Analysis, mathematical programming, and the definition of a superstructure with thermal flexibility whereby mass flows can exchange heat in various temperature intervals. With the detailed characterization of the thermal energy flows associated with the thermal energy technologies and services to be supplied to the building, the optimization procedure provides a more realistic system configuration, ensures that thermodynamic principles are satisfied, and allows for synergies and potential benefits to emerge. The methodology is first introduced through a simple example of a gas engine-based energy system, highlighting the necessity of a detailed characterization of the hot and cold flows regarding their quantity and quality levels. Then, the approach is applied to the case study of a Brazilian university hospital that requires electricity, steam, hot water, and chilled water. The optimization is formulated as a multi-period mixed integer linear programming model that minimizes the total annual cost of installing and operating the system using local-based data. The results show the technical and economic interest of deploying cogeneration gas engines to cover electricity and thermal energy services. Besides, a strong synergy is observed between the cogeneration gas engine and the single-effect absorption chiller. Thus, it is demonstrated how a preliminary analysis of thermal integration opportunities must be an integral part of the optimal synthesis of energy supply systems.

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Section: Optimal Operation Of the Cchp Systemsupporting

confidence: 93%

Tackling thermal integration in the synthesis of polygeneration systems for buildings

Pina

Lozano²,

Ramos³

et al. 2020

Applied Energy

View full text Add to dashboard Cite

show abstract

“…In another case when the delivered electricity cannot fully meet the load demands, alternative multiple energy productions from local CCHP system can be utilized as supplements [10] , [11] , [12] , [13] . In the LMG based CCHP scheme in Fig.…”

Section: Principle and Benefit Evaluation Of Multiple Energy Supply S...mentioning

confidence: 99%

“…In addition to improving the energy efficiency of healthcare and medical facilities, there are mainly two approaches to reduce the burden of power and fuel consumptions. One is using local renewable energy sources (RESs) such as solar and wind [6] , [7] , [8] , [9] , and the other is adopting multi-energy integration techniques such as combined heat and power (CHP), and combined cooling, heating, and power (CCHP) [10] , [11] , [12] , [13] . For most renewable energy sources, they are generally fluctuating, intermittent and unpredictable [14] .…”

Section: Introductionmentioning

confidence: 99%

Hospital-oriented quad-generation (HOQG)—A combined cooling, heating, power and gas (CCHPG) system

Chen

Zhang

et al. 2021

Applied Energy

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“…Yang et al (Yang and Zhai 2019) applied these reference data and models to optimize and assess hybrid energy systems. In this study, 2 and Table 3, respectively (Ahn et al 2018;Jing et al 2017;Tan et al 2017;Zhang et al 2018;Zhou et al 2013a). The MILP problem is solved with the CPLEX solver in the MATLAB environment.…”

Section: Case Studymentioning

confidence: 99%

“…Technical parameters of the components(Ahn et al 2018;Jing et al 2017;Tan et al 2017;Zhang et al 2018;Zhou et al 2013a) …”

mentioning

confidence: 99%

A hierarchical genetic algorithm and mixed-integer linear programming-based stochastic optimization of the configuration of integrated trigeneration energy systems

Zhang

Jiang

Zhang

et al. 2021

Clean Techn Environ Policy

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Facing the growing pressure of climate change and environmental protection, integrated energy systems (IESs), which comprise different energy sources, have become promising candidates for future energy systems. However, the capacity configuration of each source remains challenging due to the various couplings, randomness of renewables and numerical optimization difficulty. In this paper, a hierarchical optimization framework is proposed to determine the component capacities of trigeneration IESs, i.e., systems involving combined cooling, heating and power (CCHP) generation. The potential variation in the demand and renewable resource availability are considered stochastic factors and captured as scenarios generated according to a probability function. In the first level, with the component capacities and scenarios defined, a mixed-integer linear programming (MILP) problem is formulated to minimize the total system cost. Then, in the second level, the Monte Carlo method is applied to calculate the expectation by feeding different scenarios into the MILP and sampling the minimal costs. Finally, as the second level returns the expected value of the system cost considering the given component capacities, a genetic algorithm is adopted in the third level to search the optimal component capacities. Compared to the conventional deterministic optimization method, the proposed stochastic optimization method reduces the annual operational cost while allowing a wider operational range. In addition, it is revealed that the inclusion of heat storage and grid connections yields notable benefits in terms of IES cost reduction.

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Performance assessment of hybrid chiller systems for combined cooling, heating and power production

Cited by 41 publications

References 44 publications

Tackling thermal integration in the synthesis of polygeneration systems for buildings

Tackling thermal integration in the synthesis of polygeneration systems for buildings

Hospital-oriented quad-generation (HOQG)—A combined cooling, heating, power and gas (CCHPG) system

A hierarchical genetic algorithm and mixed-integer linear programming-based stochastic optimization of the configuration of integrated trigeneration energy systems

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