Life cycle performance evaluation of cascade-heating high temperature heat pump system for waste heat utilization: Energy consumption, emissions and financial analyses

Dai, Baomin; Liu, Xiao; Liu, Shengchun; Wang, Dabiao; Meng, Chenyang; Wang, Qi; Song, Yifan; Zou, Tonghua

doi:10.1016/j.energy.2022.125314

Cited by 12 publications

(2 citation statements)

References 55 publications

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“…The final steam produced by the system can reach temperatures of 130 °C. Dai et al (2020) adopted the structure of dual-pressure condenser to carry out piecewise heat transfer for thermal products, effectively reducing the exergic loss caused by excessive heat exchange temperature difference. Zhang YT et al (Hao et al, 2022) conducted relevant research on the influence of IHX in the steam system of a complex HTHP, and the results showed that the COP after IHX positioning was increased by 4.87% compared with the conventional cycle.…”

Section: Introductionmentioning

confidence: 99%

System optimization of steam generation in the dual-flash compound circulation system

et al. 2023

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Concentrating on the problem of massive energy loss in the compressor, expansion valve, and the other components present in the high-temperature heat pump system under extensive temperature lift, the dual-flash compound circulation system is proposed and the thermodynamic model of the dual-flash compound circulation system was established. The article combines the multivariate simulated annealing algorithm, utilizes the system COP as the optimization goal, and completes the calculation of the thermodynamic parameters in the steady-state of the system that is based on satisfying the conditions of the system process. Using R245fa as the refrigerant, the condensation temperature is set within the range of 110°C–140°C for the model calculation. The results show that, compared to the traditional two-stage compression system under the same environment, the COP of the dual-flash compound circulation system can be increased up to 5.71%–12.13%, and the exergy efficiency can be increased by 5.11%–10.71%, respectively. Besides, steam production per unit refrigerant is also increased by 3.79%–5.14%. Finally, the feasibility of the theoretical model is verified by simulation, and it is concluded that the dual-flash compound circulation system has better steam production performance at the extensive temperature lift and the elevated condensation temperature.

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Section: Introductionmentioning

confidence: 99%

System optimization of steam generation in the dual-flash compound circulation system

et al. 2023

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“…This is a heat pump with a heat sink temperature between 85℃ and 160℃ [21], using low or medium temperature heat as a heat source. Interest in such technology has increased over the last years [22][23][24][25], mainly in industrial uses to provide medium or high temperature heating [26,27]. This is generally supplied by inefficient auxiliary systems (e.g., boilers and electric heaters).…”

Section: Introductionmentioning

confidence: 99%

High Temperature Heat Pump with Combined Cooling, Heat and Power Plant in Industrial Buildings: An Energy Analysis

Noro¹

2023

IJHT

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In this paper, the coupling of a high temperature heat pump with a combined cooling, heat, and power system is investigated. The plant converts the input energy source (natural gas) into electricity and useful thermal energy by means of a cogenerator. Part of the thermal energy feeds an absorption chiller that produces the cooling energy to satisfy the cooling load of an existing industrial building located in northern Italy. The heat pump enhances the low temperature heat from the condenser and absorber of the absorption chiller to high temperature heat to integrate the hot water produced by the cogenerator. The energy performance of the entire plant is analyzed by means of steady-state simulations at both fixed conditions and on an annual operation to meet the heating, cooling, and electric needs of the building varying different parameters and compared to traditional systems for energy production. As the main results, the integrated system provides flexibility and achieves valuable energy performances, in the range of a few tens of percent with respect to benchmark energy production systems.

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Thermodynamic performance of heat pump with R1234ze(E)/R1336mzz(E) binary refrigerant

Wang

Jiang

et al. 2023

Applied Thermal Engineering

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Life cycle performance evaluation of cascade-heating high temperature heat pump system for waste heat utilization: Energy consumption, emissions and financial analyses

Cited by 12 publications

References 55 publications

System optimization of steam generation in the dual-flash compound circulation system

System optimization of steam generation in the dual-flash compound circulation system

High Temperature Heat Pump with Combined Cooling, Heat and Power Plant in Industrial Buildings: An Energy Analysis

Thermodynamic performance of heat pump with R1234ze(E)/R1336mzz(E) binary refrigerant

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