Leakage quantification of compressed air using ultrasound and infrared thermography

Dudić, Slobodan; Ignjatović, Ivana; Šešlija, Dragan; Blagojević, Vladislav; Stojiljković, Miodrag

doi:10.1016/j.measurement.2012.04.019

Cited by 60 publications

(36 citation statements)

References 19 publications

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“…Analysis of results reveals either that the flow of compressed air increases with the increase of orifice diameter, or with the increase of system pressure, which is in agreement with the expected flow increase. Similar to the flexible hose [33], the results obtained with the steel pipe indicate an increase on the flow of compressed air with the increasing of pressure and the size of the orifice. The orifices on the steel pipes are in the perfect shape and without sharp edges so the amount of compressed air that leaks through them is much higher.…”

Section: Flow Measurementmentioning

confidence: 53%

“…IR camera can record temperature changes in the installation and determine the locations of failures or leaks. With the scheduled actions, such as eliminating failures and locations where leak occurs, it is possible to accomplish significant savings in the consumption of compressed air, or raise the energy efficiency of the entire pneumatic system [33].…”

Section: Infrared Thermographymentioning

confidence: 99%

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Leakage quantification of compressed air on pipes using thermovision

et al. 2012

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Nondestructive testing methods are increasingly in use. With these methods it is possible to obtain the desired information about the system, without altering or damaging it in any way. This paper examines the possibilities of applying these methods in the quantification of losses incurred by leaking of compressed air from the system in the terms of increasing energy efficiency of the system. The emphasis is on the application of ultrasound detector and IR (infrared) thermographic camera. The potentials and limitations of these technologies are analyzed for leakage quantification on a steel pipe in compressed air systems, as well as the reliability and accuracy of the results thus obtained

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Section: Flow Measurementmentioning

confidence: 53%

Section: Infrared Thermographymentioning

confidence: 99%

Leakage quantification of compressed air on pipes using thermovision

et al. 2012

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“…The relation between the local and the mean heat transfer coefficients is illuminated, calculation procedures based on the thermal boundary conditions are given. 25 Shahraeeni et al 26 used it to quantify subsurface thermal regimes beneath evaporating porous surfaces. The spatial distribution and dynamics of non-uniform evaporative mass fluxes from porous media are quantified remotely from induced surface thermal field obtained by spatially resolved infrared thermometry.…”

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confidence: 99%

Thermography, A New Approach in Food Science Studies: A Review

Samanian

Mohebbi

2016

MOJFPT

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Background: Thermography can be defined as a process of writing or printing involving the use of heat. It's a technique for detecting and measuring variations in the heat emitted by various regions of the body and transforming them into visible signals that can be recorded photographically. Clearly it would be of great use in diagnosing abnormal or diseased underlying conditions. But in the recent years it has been suggested as a viable method in food science research both in detection and process control. Scope and approach:We reviewed thermography as a not new method which has recently found its way into vast areas of research and practice. After discussing its history and fundamentals some practical applications of thermography such as medical, agricultural and quality control are presented. But the main focus of review is laid on its usage in food science and technology, which is provided in two main categories of process control and detection, through a series of case studies. Key findings and conclusion:Thermography is a non invasive, non destructive and instantaneous method that makes dynamic observations feasible. It also can be used to confirm any slight gradient in temperature, suggesting it as a detection method. The most important drawback to method is being highly. Modification of the method to make it into a practical procedure in industry, heat and mass transfer studies and microbiological studies can be possible future concerns of the method.

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“…Sabe-se que os vazamentos de ar são uma das maiores perdas. Os sistemas de ar comprimido das grandes indústrias estão sujeitos a vazamentos e que são comuns perdas de até 40% ou mais de todo o ar comprimido produzido [13], [14]. Portanto, identificar, eliminar ou reduzir os vazamentos de ar comprimido, não apenas na rede de tubulações, como também nos equipamentos consumidores,é um dos modos mais simples de eficientemente economizar energia.…”

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“…• C do que a 21 • C.É importante também ressaltar o efeito das perdas de carga e dos vazamentos que obrigam o sistema de ar comprimido trabalhar em uma pressão superior ao que deveria, conduzindo a um aumento do consumo de EE [14]. As perdas de carga são oriundas do atrito do ar em movimento com as rugosidades da tubulação e conexões.…”

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Study, Evaluation and Implementation of Improvement in a compressed Air Plant

Altafini¹,

Nunes²

2013

Sci. cum Ind.

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ResumoEste trabalho apresenta um estudo de um sistema de geração de ar comprimido em um fabricante deônibus rodoviário. Primeiramente, avaliou-se o funcionamento dos compressores para se determinar o consumo de energia elétrica e se identificar um possível aproveitamento da energia térmica liberada pelos mesmos. Ainda, os principais pontos de vazamentos da rede de ar comprimido foram identificados para que uma ação corretiva fosse tomada. Para o desenvolvimento deste trabalho,é inicialmente feita uma revisão dos conceitos fundamentais envolvidos, sendo, em linhas gerais, revisados os conceitos básicos de transformações termodinâmicas. Uma introduçãoà energia elétricaé apresentada para levar ao entendimento do consumo dos compressores. Uma abordagem geral sobre o sistema de geração de ar comprimidoé mostrada com o intuito de compreender técnicas de eficiência energética. As ferramentas utilizadas no desenvolvimento do trabalho foram basicamente analisadores de energia. A proposta de redução do consumo de energia elétrica com a instalação de um gerenciador foi alcançada, ou seja, houve uma redução de aproximadamente 60.600 kWh mensais, o que proporcionou uma economia mensal de R$19.400,00, validando o levantamento de dados. Para o aproveitamento de energia térmica foi dimensionada uma serpentina de aquecimento deágua que poderá ser usada um em processo de aquecimento de guarnições de borracha. Além disso, para sanar os vazamentos na rede de ar comprimido foi implantado um plano de manutenção, permitindo a redução dos vazamentos de ar em quase 50%. Palavras-chaveTransformações termodinâmicas, eficiência energética, compressores, compressores de parafuso. Study, Evaluation and Implementation of Improvement in a Compressed Air PlantAbstract This paper presents a study of a compressed air generation system in a bus manufacturer, being evaluated the operation of the compressors to identify the electric energy consumption. A maintenance plan is elaborated to correct the air system leaks and also proposes the reuse of thermal energy generated by the compressors. Initially, as for the purpose of this paper, a revision of fundamentals related to thermodynamics transformation is presented. Afterwards, some important electric energy concepts will lead to the understanding of the energy consumption of the compressors. Then, an overview about compressed air generation systems will be showed with the goal of understanding techniques of energetic efficiency. The tools used in this study for collecting data were the software of a compressor manufacturer with pressure transducers and an energy analyzer. The basic concepts and their uses will be shown along this paper. The proposal of electric energy consumption reduction was achieved with the installation of compressor operation managers and yields a reduction about 60,600 kWh per month, which provided a monthly saving of R$19,400.00, validating the collected data. For heat recovery from the cooling air compressors, externally finned coils were sized to heat water up to 55• C and ...

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Leakage quantification of compressed air using ultrasound and infrared thermography

Cited by 60 publications

References 19 publications

Leakage quantification of compressed air on pipes using thermovision

Leakage quantification of compressed air on pipes using thermovision

Thermography, A New Approach in Food Science Studies: A Review

Study, Evaluation and Implementation of Improvement in a compressed Air Plant

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