Investigation of Heat Loss from the Finned Housing of the Electric Motor of a Vacuum Pump

Wernik, Jacek

doi:10.3390/app7121214

Cited by 9 publications

(4 citation statements)

References 20 publications

(18 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The advantages of thermal imaging cameras are that they are non-invasive and can locate faults invisible to the naked eye. The test with a thermal imaging camera is based on measuring the temperature from the external surface, where the temperature distribution is non-uniform [79]. In order to obtain the relevant quantities, an average is determined which forms the basis for fault finding as temperatures increase above the normal operating ones.…”

Section: Methodsmentioning

confidence: 99%

Thermal Imaging Study to Determine the Operational Condition of a Conveyor Belt Drive System Structure

et al. 2021

View full text Add to dashboard Cite

The paper discusses the results of a study carried out to determine the thermal condition of a conveyor power unit using a thermal imaging camera. The tests covered conveyors in the main haulage system carrying coal from a longwall. The measurements were taken with a thermal imaging diagnostic method which measures infrared radiation emitted by an object. This technology provides a means of assessing the imminence and severity of a possible failure or damage. The method is a non-contact measuring technique and offers great advantages in an underground mine. The thermograms were analysed by comparing the temperature distribution. An analysis of the operating time of the conveyors was also carried out and the causes of the thermal condition were determined. The main purpose of the research was to detect changes in thermal state during the operation of a belt conveyor that could indicate failure and permit early maintenance and eliminate the chance of a fire. The article also discusses the construction and principle of operation of a thermal imaging camera. The findings obtained from the research analysis on determining the thermal condition of the conveyor drive unit are a valuable source of information for the mine’s maintenance service.

show abstract

Section: Methodsmentioning

confidence: 99%

Thermal Imaging Study to Determine the Operational Condition of a Conveyor Belt Drive System Structure

et al. 2021

View full text Add to dashboard Cite

show abstract

“…By comparison, the finite element method is high precision and widely used [25,26]. Using Comsol software, the finite element model was established according to the structure and parameters of the IWM in Section 2, and the dynamic mesh was set for the rotating part of the motor.…”

Section: Establishment Of the Finite Element Modelmentioning

confidence: 99%

A Study on the Electromagnetic–Temperature Coupled Analysis Method for In-Wheel Motors

Tan

Yang

et al. 2019

Applied Sciences

View full text Add to dashboard Cite

As the core component of in-wheel motor-driven electric vehicles, the in-wheel motor (IWM) directly affects the driving/braking performance of each driving wheel and the driving performance of the vehicle. The IWM operation involves a coupling of multi-fields, including the electromagnetic, temperature, flow, and mechanical fields, which influence each other. It is necessary to study coupling analysis methods to obtain accurate and consistent results. In this paper, a 15 kW in-wheel motor is taken as the research object. Based on the finite element model of the IWM, the coupling factors between the electromagnetic and temperature field, and the influence trend of coupling factors on the two fields are investigated. On this basis, considering the strong coupling factors obtained from the above analysis, the unidirectional coupling and bidirectional coupling analysis methods are used to analyze the electromagnetic–temperature characteristics of the IWM, and the comparative results between the two methods are discussed. It was found that the results showed the temperature of the IWM calculated by the bidirectional coupling method was higher than that obtained by the unidirectional coupling analysis method. The maximum temperature of stator windings calculated by bidirectional coupling was 7.1% higher than that calculated by unidirectional coupling analysis, and the effect on the relative difference of torque could reach 7.4%. Bidirectional coupling can more accurately reflect the variation of variables in the fields and the prediction of motor performance in the process of motor operation. The progress made in the electromagnetic–temperature coupled analysis method can provide a theoretical basis and useful ideas for the multi-fields coupling analysis of IWMs.

show abstract

“…These entities are more interested in the magnitude of the heat flux supplied or emitted from a real heat exchange surface than in the heat transfer mechanisms, the participation of convection and radiation in them, the simplifying assumptions made, the experimental procedures etc. The response to this heightened interest in applications of overall convective and radiative heat transfer can be found in papers dealing with heat losses in construction [57][58][59][60][61][62] and from the housings of industrial devices (motors, pumps, exchangers) [63], and the heat fluxes transferred within specific devices, such as baking ovens [64], internal combustion engine cylinders [65] or glass furnaces [66,67].…”

Section: Introductionmentioning

confidence: 99%

Empirical Relationship Describing Total Convective and Radiative Heat Loss in Buildings

Ryms¹,

Kwiatkowski²,

Lewandowski³

2023

IJHT

View full text Add to dashboard Cite

On the basis of theoretical considerations of convective-radiative heat transfer, a relationship was developed enabling the total convective and radiative heat flux QC+R emitted from any object at tw and its surroundings at t∞ to be calculated from known values of the surface temperature of such an object, i.e., the known temperature difference Δt=tw -t∞ and average air temperature Tav. This relationship is applied to thermal imaging cameras with the aim of developing appropriate software to enhance their measurement capabilities. They can then be used not only for monitoring and measuring temperature, local overheating, heat losses through insulation materials, thermal bridges, constructional defects, moisture, etc., but also for measuring the heat losses from any object, such walls and buildings. This empirical relationship includes constants relating to the object itself, such as its characteristic dimension l, surface area A, emissivity ε and temperature parameters, which depend on tw, t∞, Δt and Tav and on the physical properties of air. Experimental validation of the proposed relationship, performed for two values of the surface emissivity ε, showing the discrepancies ΔQC+R=1.75% (for ε=0.884) and 4.85% (for ε=0.932), has confirmed its correctness and its practicability.

show abstract

Investigation of Heat Loss from the Finned Housing of the Electric Motor of a Vacuum Pump

Cited by 9 publications

References 20 publications

Thermal Imaging Study to Determine the Operational Condition of a Conveyor Belt Drive System Structure

Thermal Imaging Study to Determine the Operational Condition of a Conveyor Belt Drive System Structure

A Study on the Electromagnetic–Temperature Coupled Analysis Method for In-Wheel Motors

Empirical Relationship Describing Total Convective and Radiative Heat Loss in Buildings

Contact Info

Product

Resources

About