An optimal design for hollow fiber heat exchanger: A combined numerical and experimental investigation

Boháček, Jan; Raudenský, Miroslav; Astrouski, Ilya; Karimi-Sibaki, Ebrahim

doi:10.1016/j.energy.2021.120571

Cited by 10 publications

(4 citation statements)

References 33 publications

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“…First, the data are normalized, and then the two-level maximum difference and the two-pole minimum difference of the sequence are obtained. From Equation (10), the resolution coefficient ρ is taken as 0.5, and the ECC and EDC are calculated under each working condition, respectively. Tables 2 and 3 The ECC is shown in Table 2.…”

Section: Case Applicationmentioning

confidence: 99%

“…[ 9 ] Bohacek et al improved the structural design of the polymer hollow fibre heat exchanger, established a lattice Boltzmann simulation model, and verified the model perfectly by ANSYS. [ 10 ] Judt and Bartoszewicz optimized the shell structure and tube structure of the heat exchanger. The heat exchanger proposed in this study allows the valve system to be simply adjusted and it improves the efficiency of the heat transfer process.…”

Section: Introductionmentioning

confidence: 99%

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Energy savings bottleneck diagnosis of cooling system based on integrated correlation analysis

Zhu

Cui

2022

Can J Chem Eng

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The circulation cooling system is an important auxiliary system in industry and has great potential for saving energy. However, a holistic energy savings retrofit of the system can cause high costs and a low input–output ratio. To address this problem, this paper integrates grey correlation analysis and partial correlation analysis to propose a new energy savings bottleneck diagnosis method for the circulating cooling system. This method deeply analyzes the operation mechanism of the industrial circulating cooling system and summarizes the main energy‐savings factor. Through the energy savings bottleneck diagnosis method based on grey correlation analysis and partial correlation analysis, the energy savings correlation coefficient and energy savings difference coefficient are calculated, and the relationship between each energy savings factor and the specific energy consumption is accurately described and quantified. Furthermore, the system energy savings bottleneck diagnosis is performed and the quantified energy savings priority of each system link is obtained. It can effectively guide the implementation of system energy savings optimization and retrofit. Finally, the effectiveness of the diagnosis method is demonstrated by simulation verification with actual network data.

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Section: Case Applicationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Energy savings bottleneck diagnosis of cooling system based on integrated correlation analysis

Zhu

Cui

2022

Can J Chem Eng

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“…Currently, they are being tested as a heat exchanger in many applications including automotive [1,2] and Li-ion battery thermal management [3,4]. To achieve high thermal performance, liquid-to-gas plastic heat exchangers should be made of a large number of hollow fibers to ensure both low tube wall thickness and high air-side transfer area [5]. Figure 1 shows a polymeric fiber radiator made of a total of 12,240 tubes (34 layers of 360 tubes).…”

Section: Introductionmentioning

confidence: 99%

Shear Strength of Adhesive Bonding of Plastics Intended for High Temperature Plastic Radiators

et al. 2022

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The use of adhesive joints has increased in recent decades due to their competitive features in comparison with other joining methods. They can be used in specific applications where there is no possibility to use alternative connection techniques. Adhesive bonding was used to assemble the prototype of a high-temperature car radiator (operated up to 125 °C) with a total of 12,240 plastic tubes. This work aims to estimate the shear strength of different adhesives intended for bonding the plastics used to assemble the above-mentioned high-temperature radiator. Fourteen commercial adhesives were tested with one thermoset plastic (G11 glass fabric epoxy sheets) and two glass-reinforced thermoplastics (polyamide PA66-GF30 and polyphenylene sulfide PPS-GF40). Tests were conducted according EN 1465 to determine tensile lap-shear strength of bonding. Testing showed that only 4 of the 14 adhesives tested exhibit substantial bonding strength at temperatures above 120 °C and only one is resistant at 180 °C. The AS60/AW60 adhesive showed the best results for all three substrates: 1.6 MPa for epoxy sheets and PA66-GF, and 1.4 MPa for PPS-GF40. Additionally, the influence of the surface treatment with cold plasma was evaluated on a clean and activated bonding surface, causing a 30% increase in the shear strength.

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“…It is a dramatically improved version of the heat exchanger published in [18,19]. Coolant channels are made of polypropylene hollow fibers [20,21] with an inner diameter of 0.84 mm, frozen permanently in a polydicyclopentadiene housing. Unlike the preliminary design, the fibers protrude halfway where the cells are in direct contact with the heat exchanger.…”

Section: Introductionmentioning

confidence: 99%

Polymeric hollow fibers: a modular heat exchanger for thermal management systems of battery modules in electric vehicles

et al. 2022

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The liquid-cooling system based on polymeric hollow fibers (ø1 mm) embedded inside durable polydicyclopentadiene is proposed for thermal management of li-ion cylindrical batteries from their surface. In the present work, a dramatically improved design is presented, eliminating the following drawbacks: I) the thermal resistance of the heat exchanger is minimized by bringing fibers into direct contact with the negative terminal/cylindrical shell, II) the fabrication process (combination of extrusion and rapid injection molding) is significantly simplified and accelerated as the essential component of the heat exchanger is nearly planar, and III) inlet/outlet manifolds were refined to enhance modularization of the cooling system of the whole battery pack. The pressure loss of the heat exchanger is favorably low, about 100 Pa, corresponding to 10 l/min of the coolant circulating in the entire battery pack of a virtual electrical vehicle. The heat exchanger was stacked with 18650-type lithium-ion cells, which were repeatedly charged/discharged. With the coolant inlet temperature of 20 °C and the C-rate of 1 C, the maximum temperature of the cells during cycling was between 26 °C and 22 °C in the given range of flow rates (5–45 ml/min). Temperature spreads were 10 °C and 4 °C.

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An optimal design for hollow fiber heat exchanger: A combined numerical and experimental investigation

Cited by 10 publications

References 33 publications

Energy savings bottleneck diagnosis of cooling system based on integrated correlation analysis

Energy savings bottleneck diagnosis of cooling system based on integrated correlation analysis

Shear Strength of Adhesive Bonding of Plastics Intended for High Temperature Plastic Radiators

Polymeric hollow fibers: a modular heat exchanger for thermal management systems of battery modules in electric vehicles

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