Design and performance analysis of compressed air adsorption dryer with heatless regeneration mode

Sureshkannan, V; Vijayan, S.; Lenin, V.R.

doi:10.1007/s00231-021-03136-4

Cited by 4 publications

(3 citation statements)

References 30 publications

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“…The authors presented the designed dryer and emphasized that its use in rail vehicles most effectively removes moisture from compressed air. In 2022, Sureshkannan et al [19] developed a design procedure of adsorption dryer with a heatless regeneration mode. The proposed dryers can be used in applications requiring a dew point from -40 to -70°C and in which air pressure ranges from 5 bar, and inlet pressure temperature from 25 to 45°C.…”

Section: Literature Reviewmentioning

confidence: 99%

Adsorption dryer for use in railways

Matusiak¹,

Goliwąs²,

Kaluba³

2022

Rail Vehicles/Pojazdy Szynowe

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Pneumatic brake, which use compressed air as a working medium, is the main brake of rail vehicles. The equipment used in the braking system requires sufficiently clean, without water vapour medium to work properly. Removing water vapour from the air prevents condensation and ice formation during winter, which guarantees correct brake operation. For this purpose, adsorption dryers are used in the railways to ensure the required pressure dew point value. This article includes an overview of available compressed air drying methods, the results of calculations and bench test of the dryer prototype developed at the Institute. Assumptions and requirements for the device intended for use in railways are based on European standards and UIC cards.

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Section: Literature Reviewmentioning

confidence: 99%

Adsorption dryer for use in railways

Matusiak¹,

Goliwąs²,

Kaluba³

2022

Rail Vehicles/Pojazdy Szynowe

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“…Performance of compressor has arrived through the energy required value based on compressor type is multiplied by the regeneration volume ow rate, purge air quantity, and cooling air quantity to arrive performance product by Eq. (24).…”

Section: Economic Analysis Of Heat Regeneration-based Adsorption Dryermentioning

confidence: 99%

Evaluation of compressed air adsorption dryer with three different heat regeneration modes

kannan¹,

Vijayan

Lenin³

et al. 2022

Preprint

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Compressed air without any traces of moisture is utmost important in several engineering applications. Heat regeneration-based adsorption dryer is mostly preferred to treat compressed air to ultra-low dew point. In this work, the essential characteristics of the different types heat regeneration mode adsorption dryer namely internal heating mode, external heating mode and compressed air heating mode are experimentally studied. The principal calculation schemes of adsorption dryers are based on the previous work and the calculations form the basis of a logical comparison between systems. The system assessment is carried out on common performance range for all modes namely compressed air output of 1000 to 5000 m3/hr, operating pressure of 5 to 10 bar, and feed air temperature of 25 to 45°C. The results revealed that the characteristic specific energy requirement in terms of electrical energy for internal heating regeneration, external heating regeneration and compressor air heating regeneration are 0.176 kW/m3/min,0.342 kW/m3/min, and 0 kW/m3/min respectively. In addition to that the characteristic specific energy requirement in terms of dried regeneration air requirement for internal heating, external heating and compressor air heating are 0.203 kW/m3/min,0 kW/m3/min, and 0 kW/m3/min respectively. It is also concluded that the energy and capital cost referred to 35°C feed air temperature and 8 bar abs. feed air pressure for 3000 m3/hr volume flow rate of product air attracts same amount for all the three modes of heat regeneration. Thus, a system comparison with reproducible dryer data for the varying performance ranges can be developed and utilized for practical purposes.

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“…Compressed air is widely used in various industries as both a power source as well as a process gas source for various applications such as drying and pneumatics [1,2]. However, compressed air can be harmful to production processes when its humidity is too high, leading to problems such as reducing electrical insulation and causing valve corrosion [3]. As the use of liquid desiccants is advantageous in lowering energy costs [4][5][6], a new method of compressed air drying using liquid desiccant has been proposed.…”

Section: Introductionmentioning

confidence: 99%

Effect of Air Parameters on LiCl-H2O Film Flow Behavior in Liquid Desiccant Systems

Lyu,

Yin,

Wang

2024

Buildings

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The wettability and stability of a solution’s film on the filler surface are the key factors determining heat and mass transfer efficiency in liquid desiccant air conditioning systems. Therefore, this study investigates the effects of different air parameters on the flow behavior of a lithium chloride solution’s film. The effects of air velocity, air flow pattern, and pressure on the wettability and critical amount of spray are discussed. The results show that the main mechanism by which the air velocity affects the wettability is that the shear stress generated by the direction of the air velocity disperses the direction of the surface tension and weakens its effect on the liquid film distribution. In addition, in the counter flow pattern, the air flow blocks the liquid film from spreading longitudinally and destroys the stability of the liquid film at the liquid outlet, which increases the critical amount of spray. The pressure distribution is similar under different operating pressures when the flow is stable; thus, pressure has little effect on wettability. The simulation results under 8 atm are compared with the experimental results. It is found that the sudden increase in the amount of moisture removal when the amount of spray changes from 0.05 to 0.1 m3/(m·h) in the experiment is caused by the change in the liquid film flow state. In addition, the results show that within the range of air flow parameters for the liquid desiccant air conditioning system, air flow shear force is not the main factor affecting the stability of the solution’s film, and there is no secondary breakage of the solution’s film during the falling-film flow process.

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Design and performance analysis of compressed air adsorption dryer with heatless regeneration mode

Cited by 4 publications

References 30 publications

Adsorption dryer for use in railways

Adsorption dryer for use in railways

Evaluation of compressed air adsorption dryer with three different heat regeneration modes

Effect of Air Parameters on LiCl-H2O Film Flow Behavior in Liquid Desiccant Systems

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