A novel method to determine air leakage in heat pump clothes dryers

Bansal, Pradeep; Mohabir, Amar; Miller, William A.

doi:10.1016/j.energy.2015.12.051

Cited by 19 publications

(11 citation statements)

References 16 publications

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“…It can be found that the leakage increases sharply with the increase of leak aperture. Its variation trend confirms the analysis discussed in Equation (7). Therefore, in the process of air-leakage detection with an ultrasonic detector, the system pressure can be set to a certain stable value due to its slight influence on the leakage rate, and the size of the leak aperture can be computed directly by the leakage rate measured by the flow-meter.…”

Section: Effects Of System Pressure and Leak Aperture On The Leakage Ratesupporting

confidence: 73%

“…The technology of ultrasonic and infrared detections that have appeared in recent years was also explained in detail. In addition, Bansal et al [7] developed a novel method to regulate the air-leakage area in a household ventilation system by fan pressurization. With this technique, the leakage area can be revealed by an assessment of the leakage volumetric flow-pressure relationship.…”

Section: Introductionmentioning

confidence: 99%

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An Ultrasonic-Based Detection of Air-Leakage for the Unclosed Components of Aircraft

Lyu

Jamil

et al. 2021

Aerospace

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Air-leakage detection is among the most important processes at the assembly stage of unclosed components, especially for large aircraft. A series of air-leakage detecting methods are generally applied during the final assembly, nevertheless, many of them are less effective to detect the leakage at the assembly stage. The present study aims to discuss the principles of ultrasonic generation in negative pressure conditions to detect the air-leakage. An ultrasonic-based detection method is proposed and designed to detect the air-leakage of unclosed components for aircraft. A relationship between the acoustic power, sound pressure, and the leak aperture detection distance was identified and discussed. A leakage rate model related to leakage rate, leak aperture, and system pressure was implemented and confirmed through experiments. Findings have indicated that the air-leakage can be detected effectively within a detection distance of 0.8 m and a leak aperture greater or equal to 0.4 mm with this method. Besides, the leak location, leak aperture, and leakage rate was acquired in an accurate and fast way. It is an effective method of detecting the air-leakage of unclosed components at the aircraft assembly stage reducing the testing time, energy consumption, and cost for the air-leakage detection in the final assembly stage of large aircraft.

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Section: Effects Of System Pressure and Leak Aperture On The Leakage Ratesupporting

confidence: 73%

Section: Introductionmentioning

confidence: 99%

An Ultrasonic-Based Detection of Air-Leakage for the Unclosed Components of Aircraft

Lyu

Jamil

et al. 2021

Aerospace

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“…The performance of a drying system is characterized by various indices, including energy efficiency, thermal efficiency, volumetric evaporation rate, specific heat consumption, surface heat losses, unit steam consumption, and others which have been defined to reflect the requirements of various drying technologies [30]. Energy efficiency is critical because energy consumption strongly affects the drying costs [31].…”

Section: Drying Efficiencymentioning

confidence: 99%

Energetic And Exergetic Investigations of an Integrated Heat Pump System for Drying Applications

Acar

2018

Hittite J. Sci. Eng.

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A s the world faces unprecedented energy challenges, many countries are looking to include smart solutions to energy consuming processes as an effort to reach a sustainable future. Drying is a major energy-intensive process used in a wide variety of industrial applications. The main reason for the wide use of drying as a popular industrial application is drying reduces overall product weight and size for easier transportation which also decreases the space requirements and fuel consumption. Drying also increases the storage time of foods and industrial products. However, drying is the main reason of high energy consumption of many industries, for instance, the energy consumption during the drying process is equal to almost 50% and 70% of the overall energy consumption in the textile and forestry industries,

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“…However drying characteristics and SMER were not discussed. Recently, Bansal et al [11] reported a study on the method to determine air leakage in heat pump clothes dryer. In the system, heat pump was employed to produce hot drying air to tumbler dryer instead of using conventional electric heater.…”

Section: Introductionmentioning

confidence: 99%

“…They suggested and tested a procedure to determine air leakage in heat pump clothes dryers. Mainly the studies related to clothes dryer found in literature dealt with tumble dryer [11][12][13][14][15] and only very limited studies related to cabinet heat pump clothes dryer.…”

Section: Introductionmentioning

confidence: 99%

Performance of a clothes drying cabinet by utilizing waste heat from a split-type residential air conditioner

Ambarita

Nasution

Siahaan

et al. 2016

Case Studies in Thermal Engineering

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a b s t r a c tIn the present paper a study on the performance of clothes drying cabinet by utilizing waste heat from a split-type residential air-conditioner (RAC) has been carried out. A drying cabinet with a volume of 1 m 3 has been designed and fabricated. The waste heat from the condenser of the RAC with power of 800 W was utilized as a heat source. In the experiments, the RAC was operated to keep a conditioned space at 20°C. The clothes dried made of pure cotton with initial weight varied 3.05 kg, 5.25 kg, 6.21 kg, 8.22 kg, and 10.22 kg. Two different inlets, single inlet and multi-inlets, has been tested. The results show that the drying time varies from 80 to 410 min. For single inlet the averaged drying time, optimum initial weight, optimum drying rate and optimum SMER was 242 min, 6.21 kg, 0.868 kg/h, and 2.345 kg/kW h. On the other hand, the drying chamber with multi-inlets the averaged drying time, optimum initial weight, optimum drying rate and optimum SMER was 222 min, 8.22 kg, 0.922 kg/h, and 2.492 kg/kW h. Thus, the present drying cabinet should be operated with multi-inlets and the initial weight varies from 6 to 8 kg.

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A novel method to determine air leakage in heat pump clothes dryers

Cited by 19 publications

References 16 publications

An Ultrasonic-Based Detection of Air-Leakage for the Unclosed Components of Aircraft

An Ultrasonic-Based Detection of Air-Leakage for the Unclosed Components of Aircraft

Energetic And Exergetic Investigations of an Integrated Heat Pump System for Drying Applications

Performance of a clothes drying cabinet by utilizing waste heat from a split-type residential air conditioner

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