Performance assessment of a novel combined heating and power system based on transcritical CO2 power and heat pump cycles using geothermal energy

Liu, Zhan; Yang, Xuqing; Liu, Xu; Yu, Zhenzhu; chen, Yige

doi:10.1016/j.enconman.2020.113355

Cited by 33 publications

(4 citation statements)

References 37 publications

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“…After optimizing by the GA, the best design solution was obtained by weighing each function. The multi-objective optimal design was also studied in [147,148] for various models of highly efficient combinations of CHP plants that were solved by the NSGA-II. The robustness of the GA was proved in a comparative study among the GA, bee colony and searching algorithms.…”

Section: • Genetic Algorithmmentioning

confidence: 99%

Optimization of Combined Heat and Power Systems by Meta-Heuristic Algorithms: An Overview

Alsagri

Alrobaian

2022

Energies

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Combined heat and power (CHP) plants are known as efficient technologies to reduce environmental emissions, balance energy costs, and increase total energy efficiency. To obtain a more efficient system, various optimization methods have been employed, based on numerical, experimental, parametric, and algorithmic optimization routes. Due to the significance of algorithmic optimization, as a systematic method for optimizing energy systems, this novel review paper is focused on the meta-heuristic optimization algorithms, implemented in CHP energy systems. By considering the applied objective functions, the main sections are divided into single-objective and multi-objective algorithms. In each case, the units’ combination is briefly detailed, the objective functions are introduced, and analyses are conducted. The main aim of this paper is to gather a database for the optimization of CHPs, demonstrate the effect of the applied optimization methods on the objective functions, and finally, introduce the most efficient methods. The most significant feature of this paper is that it covers all types of CHP optimization issues including scheduling, sizing, and designing problems, finding the extent of each optimization issue in the relevant papers in the last decade. Based on the findings, in the single-objective problems the combined heat and power economic dispatch (CHPED) issue as a subcategory of the scheduling problems is introduced as the most paid topic; the designing issue is known as the lowest paid topic. In the multi-objective problems, working on various types of CHP optimization problems has been conducted with an almost similar share. The combined heat and power economic emission dispatch (CHPEED) problem with the most share, and the sizing issue with the lowest share. The CHP designing and sizing optimization issues could be introduced as topics to work on more in the future. Additionally, the numerical results of CHPED and CHPEED problems solved by various algorithms are presented and compared. In this regard, specified test systems are considered.

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Section: • Genetic Algorithmmentioning

confidence: 99%

Optimization of Combined Heat and Power Systems by Meta-Heuristic Algorithms: An Overview

Alsagri

Alrobaian

2022

Energies

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“…6 Therefore, it is more meaningful to apply the energy recovery unit to recover work, such as expander and ejector. [7][8][9] Tian et al 10 studied the performance of trans-critical CO 2 cycle with expander, which showed the COP of such cycle is 6-10% higher than that of without expander. Joneydi Shariatzadeh et al 11 compared trans-critical CO 2 refrigeration cycle with expander and throttling valve including/excluding internal heat exchanger (IHE), which showed that both of expander and IHE can enhance the exergy efficiency.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic performance study on a novel trans-critical CO₂ heat pump cycle integrated with expander and internal heat exchanger

Pan

Nie

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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This paper presents a novel trans-critical CO2 heat pump cycle with expander (TCCE) for increasing COP in the warm period and the suction preheating in the cold period. This cycle has two main operation modes. One is TCCEA for warm period and the other is TCCEB for cold period. Theoretical simulations are conducted to study energy efficiency and exergy efficiency of this novel cycle as well as the basic cycle. The results show that in the warm period TCCEA has an excellent COP and exergy efficiency and at low discharge pressure, the COP of TCCEA is improved by up to 31.49% compared with the basic cycle. Additionally, in the cold period, using TCCEB is helpful to avoid liquid suction. Compared with the basic cycle, the heating capacity of TCCEB can be improved by up to 12%. Taking the heating capacity into account, TCCEB is the best system under the warm period. According to the simulation results, this novel cycle is better suited for warm or cold weather.

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“…Geothermal energy is a kind of heat that has been produced in the core layer of earth. Additionally, geothermal energy is clean and it is a renewable source that can be implemented for the use of heat and electricity in daily lives [1]. As a sustainable energy source, geothermal energy is an immensely used energy source which is expanding its demand day by day.…”

Section: Introductionmentioning

confidence: 99%

Geothermal Energy: Definition and Its Applications

Chettri¹,

Sankarananth²

2022

TTREGS

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The following study has served the definition of geothermal energy and its application in any sort of field in an extended manner. In the study, some objectives have been developed depending on the subject matter. Also, secondary data has been collected by following the qualitative method which are directly related with subject matter. Later on, all the data has been collected depending on the subject matter. Primarily in this study, geothermal energy has been depicted as the renewable energy source of the earth. Also, there are several types of energy sources that have been showcased as the core part of the study. The usages of geothermal energy have been represented and the benefits have been showcased in an appropriate manner. Renewable and clean energy is produced with help of these geothermal energy sources. Gravitation and friction pull is also managed by this particular thermal energy. Thermal energy plants always try to maintain sustainability and environmental factors. Radioactive isotopes are also used by thermal energy planets to generate electricity. Geothermal energy pumps are used to collect energy. Pollution is also mitigated to produce electricity with help of thermal energy plants. These plants allow the demand of electricity to be fulfilled globally. Keyword : Earth, Energy Sources, Geothermal Energy.

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Performance assessment of a novel combined heating and power system based on transcritical CO2 power and heat pump cycles using geothermal energy

Cited by 33 publications

References 37 publications

Optimization of Combined Heat and Power Systems by Meta-Heuristic Algorithms: An Overview

Optimization of Combined Heat and Power Systems by Meta-Heuristic Algorithms: An Overview

Thermodynamic performance study on a novel trans-critical CO₂ heat pump cycle integrated with expander and internal heat exchanger

Geothermal Energy: Definition and Its Applications

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Performance assessment of a novel combined heating and power system based on transcritical CO2 power and heat pump cycles using geothermal energy

Cited by 33 publications

References 37 publications

Optimization of Combined Heat and Power Systems by Meta-Heuristic Algorithms: An Overview

Optimization of Combined Heat and Power Systems by Meta-Heuristic Algorithms: An Overview

Thermodynamic performance study on a novel trans-critical CO2 heat pump cycle integrated with expander and internal heat exchanger

Geothermal Energy: Definition and Its Applications

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Thermodynamic performance study on a novel trans-critical CO₂ heat pump cycle integrated with expander and internal heat exchanger