Idioma:

Performance analysis of multistage high‐temperature heat pump cycle

Kim, Seon Tae ; Hegner, Robert ; Özuylasi, Göksel ; Stathopoulos, Panagiotis ; Nicke, Eberhard

Energy Science & Engineering, 2023-10, Vol.11 (10), p.3500-3511 [Periódico revisado por pares]

London: John Wiley & Sons, Inc

Texto completo disponível

Citações Citado por

Enviar para

Título:
Performance analysis of multistage high‐temperature heat pump cycle
Autor: Kim, Seon Tae ; Hegner, Robert ; Özuylasi, Göksel ; Stathopoulos, Panagiotis ; Nicke, Eberhard
Assuntos: Alternative energy sources ; Carbon dioxide ; Carbon dioxide emissions ; Compressors ; Coolers ; Efficiency ; Emissions ; Energy conservation ; Energy consumption ; Energy efficiency ; Energy industry ; Energy minerals ; Exergy ; Fossil fuels ; Greenhouse gases ; Heat exchangers ; Heat pumps ; Heat sinks ; High temperature ; high‐temperature heat pump ; industrial processes ; Injection ; multistage vapor compression cycle ; Optimization ; Pressure ratio ; R&D ; Research & development ; R‐718 (water) ; Simulation ; Steel production ; Temperature ; thermodynamic analysis ; Thermodynamic efficiency ; Thermodynamics ; Water vapor
É parte de: Energy Science & Engineering, 2023-10, Vol.11 (10), p.3500-3511
Descrição: Abstract High‐temperature heat pumps (HTHPs) that can supply heat at temperatures at and above 200°C have the potential to increase energy efficiency and decrease carbon dioxide (CO 2 ) emissions in industrial processes. In this study, three reversed Rankine cycles using water vapor (R‐718) as the working medium, with different intercooling strategies, were proposed and their performance has been investigated. The thermodynamic performance was estimated under different operating conditions, and the optimal pressure ratio (PR) between compression stages was found to be where both compressors had the same PR. The thermodynamic efficiency, φ , and exergy efficiency, η exergy , were also analyzed at the optimum PR. The cycles that employed an intercooler between the first and second compression stages (IC cycles) showed higher φ and η exergy values compared with the spray‐injection cycle. Among the IC cycles, the IC‐in cycle, with an inward flow direction of heat sink to the IC, demonstrated higher efficiency and deliverable temperature, T sink out , than the spray‐injection and IC‐out cycles. To assess the practical impact of the HTHP cycles on industrial CO 2 reduction, the PR for each stage was limited to 2.5. Theoretically, the IC‐in cycle could achieve a coefficient of performance of 5.86 with a T sink out of 200°C or higher when T evap and T cond were at 90°C and 150°C, respectively. Additionally, the study demonstrated that the proposed HTHP system has the potential to reduce CO 2 emissions by 8.1% in 2030 for industrial heat supply at temperature up to 200°C, by replacing existing industrial fossil boilers with high‐efficiency HTHP.
Editor: London: John Wiley & Sons, Inc
Idioma: Inglês

Voltar para lista de resultados

Realização: Logos de Redes Sociais:

Performance analysis of multistage high‐temperature heat pump cycle

Kim, Seon Tae ; Hegner, Robert ; Özuylasi, Göksel ; Stathopoulos, Panagiotis ; Nicke, Eberhard

London: John Wiley & Sons, Inc

Buscando em bases de dados remotas. Favor aguardar.