Research of technical and economic performance of plastic capillary mats used as the heat exchanger of a closed-circuit cooling tower

Liu, Jingnan; Zhang, Lixin; Zhang, Lin; Gao, Ming; Chen, Hao

doi:10.1016/j.applthermaleng.2019.03.002

Cited by 9 publications

(4 citation statements)

References 10 publications

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“…The results show that the cooling capability of two closed cooling towers with PE capillary mats was approximately equal to a normally closed cooling tower with copper tubes. Furthermore, the unit cost and energy consumption of the two PE-capillary-mats towers and the copper-tubes tower were nearly the same [26]. In summary, it is cost-effective to use small-diameter engineering plastic tubes instead of normal metal tubes in closed cooling towers.…”

Section: Engineering Plastic Capillary Mats Methodsmentioning

confidence: 88%

“…According to the calculations, when the thermal conductivity of the tube material is about 0 ∼ 5 W/(mK), the proportion of the heat transfer resistance in the tube to the total heat transfer resistance increases rapidly with the increase of the thermal conductivity of the tube, while it increases steadily and tends to be stable when the thermal conductivity is higher than 5 W/(mK) [26]. The nominal thermal conductivity of engineering plastics on the market is about 1 ∼ 2 W/(mK).…”

Section: Engineering Plastic Capillary Mats Methodsmentioning

confidence: 99%

“…In addition, the PE tubes were also found to have anticorrosion, scale inhibition, and noise reduction effects during the test [26]. Since the cooling capacity of cooling towers with engineering plastic capillary mats is about half of the cooling towers with metal tubes, it is not suitable to use the cooling towers with engineering plastic capillary mats in narrow areas.…”

Section: Engineering Plastic Capillary Mats Methodsmentioning

confidence: 99%

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Study of the Technologies for Freeze Protection of Cooling Towers in the Solar System

et al. 2022

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A cooling tower is an important guarantee for the proper operation of a solar system. To ensure proper operation of the system and to maintain high-efficiency points, the cooling tower must operate year-round. However, freezing is a common problem that degrades the performance of cooling towers in winter. For example, the air inlet forms hanging ice, which clogs the air path, and the coil in closed cooling towers freezes and cracks, leading to water leakage in the internal circulation. This has become an intractable problem that affects the safety and performance of cooling systems in winter. To address this problem, three methods of freeze protection for cooling towers are studied: (a) the dry and wet mixing operation method—the method of selecting heat exchangers under dry operation at different environments and inlet water temperatures is presented. The numerical experiment shows that the dry and wet mixing operation method can effectively avoid ice hanging on the air inlet. (b) The engineering plastic capillary mats method—its freeze protection characteristics, thermal performance, and economics are studied, and the experiment result is that polyethylene (PE) can meet the demands of freeze protection. (c) The antifreeze fluid method—the cooling capacity of the closed cooling towers with different concentrations of glycol antifreeze fluid is numerically studied by analyzing the heat transfer coefficient ratio, the air volume ratio, the heat dissipation ratio, and the flow rate ratio. The addition of glycol will reduce the cooling capacity of the closed cooling tower.

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Section: Engineering Plastic Capillary Mats Methodsmentioning

confidence: 88%

Section: Engineering Plastic Capillary Mats Methodsmentioning

confidence: 99%

Section: Engineering Plastic Capillary Mats Methodsmentioning

confidence: 99%

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Study of the Technologies for Freeze Protection of Cooling Towers in the Solar System

et al. 2022

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“…Evaporative coolers have the advantages of saving water [1], saving energy [2], and having a compact structure, and have been widely used in industrial cooling [2][3][4], heat pump systems [5], refrigeration systems [6], data centers [7], and other fields. To design evaporative coolers reasonably, extensive research has been carried out on the heat and mass transfer of evaporative coolers.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on the Heat and Mass Transfer Characteristics of an Evaporative Cooler

Zhang,

Guo,

Wang

2023

Energies

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To study the heat and mass transfer characteristics of an evaporative cooler for cooling high-temperature working fluids, an experimental device of the evaporative cooler was built, and a corresponding test system was constructed. Then, the experimental study was carried out based on an orthogonal experimental design, and the law and extent of the influence of water flow in the tube, the spray water flow rate, the inlet water temperature in the tube, and the air flow rate on the heat dissipation, cooling efficiency, and heat and mass transfer coefficients were obtained. The correlation equations of the heat and mass transfer coefficients were obtained by fitting the orthogonal experimental data, and the validity of the correlation equations was confirmed by the verification experiment.

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Study on heat and mass transfer distance of water-film evaporation in limited space using dual-wavelength digital holographic interference

Liu

Zhang

et al. 2023

Experimental Thermal and Fluid Science

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Research of technical and economic performance of plastic capillary mats used as the heat exchanger of a closed-circuit cooling tower

Cited by 9 publications

References 10 publications

Study of the Technologies for Freeze Protection of Cooling Towers in the Solar System

Study of the Technologies for Freeze Protection of Cooling Towers in the Solar System

An Experimental Study on the Heat and Mass Transfer Characteristics of an Evaporative Cooler

Study on heat and mass transfer distance of water-film evaporation in limited space using dual-wavelength digital holographic interference

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