Condensation heat transfer characteristics of R245fa in a shell and plate heat exchanger for high-temperature heat pumps

Lim, Jin‐Ho; Song, Kang Sub; Kim, Dongwoo; Lee, Jun Young; Kim, Yongchan

doi:10.1016/j.ijheatmasstransfer.2018.06.143

Cited by 29 publications

(10 citation statements)

References 26 publications

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“…Applications range from nuclear power plants to crude oil distillation units, Freire and de Andrade (2014). Considering the advantages of heat transfer and extended operating conditions, PSHEs can replace typical PHEs, Lim et al (2018).…”

Section: Introductionmentioning

confidence: 99%

Flow statistics in plate and shell heat exchangers measured with PTV

Beckedorff

Nieuwenhuizen

Bolwerk

et al. 2019

International Journal of Heat and Fluid Flow

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Section: Introductionmentioning

confidence: 99%

Flow statistics in plate and shell heat exchangers measured with PTV

Beckedorff

Nieuwenhuizen

Bolwerk

et al. 2019

International Journal of Heat and Fluid Flow

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“…In addition, Figure 4 shows the marked positions of the temperature sensors used to analyze the temperature distribution on the circular plate. The effective heat transfer area (A eff ) of the circular plate was calculated by Equation (1), and the enlargement factor and the hydraulic diameter (D h ) of the plate were calculated by Equations ( 2) and ( 3) [4][5][6]11], respectively.…”

Section: Experimental Apparatusmentioning

confidence: 99%

“…Additionally, the temperature distribution in PSHEs was not Although PSHEs have been widely used in chemical, petroleum, and industrial processes, prior research on PSHEs is lacking compared to PHEs. Lim et al [4] conducted an experimental study on the two-phase condensation heat transfer coefficient and pressure drop of R-245fa in the high-temperature region of the PHE, which has a similar heat transfer area to the PSHE. The two-phase condensation heat transfer coefficient of the PSHE was 5.9% lower on average than that of the PHE, and the pressure drop of the PSHE was 16.7% lower.…”

Section: Introductionmentioning

confidence: 99%

Single-Phase Heat Transfer Characteristics of Water in an Industrial Plate and Shell Heat Exchanger under High-Temperature Conditions

et al. 2021

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This study investigates the single-phase heat transfer, pressure drop, and temperature distribution of water in an industrial plate and shell heat exchanger (PSHE) under high-temperature conditions. In this experiment, the hot fluid flows downward on the plate side, while the cold fluid flows upward on the shell side. In the single-phase heat transfer experiment on water, the Nu is in the range of 7.85–15.2 with a Re from 1200 to 3200, which is substantially lower than that on the plate heat exchanger (PHE) studied previously. The decrease in the Nu is attributed to the reduced cross-sectional heat transfer area from the flow imbalance in the PSHE. As the Re increases, the pressure drop on the plate side increases more rapidly than that on the shell side because of the difference in the port pressure drop, flow direction, and flow position on the plate. When the Re is 2620, the pressure drops on the plate and shell sides are 52.5 kPa and 25.5 kPa, respectively, a difference of 51.4%. The temperature deviation on the circular plate increases as the Re decreases, especially between the edge and bottom of the plate because of uneven flow distribution on the plate.

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“…31 As the HPPGIS includes the ORC-PG mode and the RCC-HP mode in one unit, two different working fluids are required for an ORC-PG system and an RCC-HP system, respectively. 24,29,[33][34][35][36] For the bifunctional system, R134a, R142b, and R152a are selected as candidate working fluids for the ORC-PG mode, and R600a, R245fa, and R600 are selected as candidate working fluids for the RCC-HP heat pump mode. According to J. Freeman, the heat source temperature is a major concern in screening working fluids.…”

Section: Working Fluidsmentioning

confidence: 99%

“…Table 1 summarizes the recommended working fluids for ORC-PG or RCC-HP systems for a low-temperature source (below 90°C) from the literature. 24,29,[33][34][35][36] For the bifunctional system, R134a, R142b, and R152a are selected as candidate working fluids for the ORC-PG mode, and R600a, R245fa, and R600 are selected as candidate working fluids for the RCC-HP heat pump mode. From Table 1, it can be seen that no working fluid has been identified as an optimal working fluid for all ORC-PG and RCC-HP systems.…”

Section: Working Fluidsmentioning

confidence: 99%

Performance investigation of the heat pump and power generation integration system

Zhang

Deng

2019

Int J Energy Res

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Summary A novel heat pump and power generation integration system (HPPGIS) using solar energy as a low temperature heat source was presented in this study. This system could be operated in both an organic Rankine cycle power generation (ORC‐PG) mode and a reverse Carnot cycle heat pump (RCC‐HP) mode. Compared with a single heat pump and power generation system, this system improved the utilization efficiency of solar energy, thus showing potential for the generation of economic benefits. Contrastive analyses of different working fluids using ORC‐PG and RCC‐HP systems were conducted first, leading to the selection of R142b and R245fa as optimal fluids. Then, an experimental investigation of the system was carried out under different conditions. A heat pump and ORC system model was proposed and validated by comparing experimental and simulated values. The experimental results indicated that the HPPGIS had good feasibility and stability in both modes. In the ORC‐PG mode, HPPGIS had a power output of 1.29 kW and a thermal efficiency of 4.71% when the water inlet temperature of the evaporator was 90.03°C. In the RCC‐HP mode, HPPGIS had a COP of 3.16 and a heat capacity of 33.24 kW when the water outlet temperature of the condenser was 106.23°C.

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Condensation heat transfer characteristics of R245fa in a shell and plate heat exchanger for high-temperature heat pumps

Cited by 29 publications

References 26 publications

Flow statistics in plate and shell heat exchangers measured with PTV

Flow statistics in plate and shell heat exchangers measured with PTV

Single-Phase Heat Transfer Characteristics of Water in an Industrial Plate and Shell Heat Exchanger under High-Temperature Conditions

Performance investigation of the heat pump and power generation integration system

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