Determination and validation of transient temperature fields within a cylindrical element using the inverse heat conduction method

In order to improve the computational precision and efficiency of heat transfer of cavity medium of scroll compressor, the Symlet wavelet 10 finite element model is constructed by using the Symlet wavelet 10 function as interpolation function. The heat transfer model of cavity medium of scroll compressor under leakage flow is constructed based on large eddy simulation technology. Heat transfer analysis of cavity medium of scroll compressor is analyzed based on theoretical and experimental analysis. Results show that the Symlet wavelet 10 finite element model has higher precision and higher efficiency than the other two simulations. In addition, the influences of axis meshing clearance and radial meshing clearance on temperature of cavity medium of scroll compressor are discussed, the temperature of cavity medium of scroll compressor increases with axis meshing clearance and radial meshing clearance. The theoretical results can provide the favorable guidance for optimal design and operation of scroll compressor.

show abstract

“…The transient heat control equation of medium in cavity of scroll compressor is expressed by [28] t denotes time, s .…”

Section: Heat Transfer Model Of Medium In Cavity Of Scroll Compressormentioning

confidence: 99%

Heat Transfer Analysis in Cavity of Scroll Compressor Under Clearance Leakage Flow Based on Symlet Wavelet Finite Element Method

Zhao

Song

Gao

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…Then, it allows to calculate the distribution of thermal stresses and, after taking into account the change in factor pressure, to calculate the total thermal and pressure stresses. [6,7,8] The data shown in Fig. 2 are used to calculate stresses in the header using an in-house program written in the Fortran environment.…”

Section: Calculation Of the Wear Degree Of A Pressure Elementmentioning

confidence: 99%

Analysis of long-term operation of the steam boiler live-steam outlet header and assessment of the feasibility of the header operation during accelerated start-ups

Węglowski

Pilarczyk

2019

E3S Web Conf.

Self Cite

View full text Add to dashboard Cite

The energy mix in most European countries is now characterized by a growing share of renewable energy sources (RES). The random nature of RES entails the need to balance the differences between the current amount of power generated in the system and the actual power demand. For this reason, power units incorporating steam boilers are most often operated under sub-peak rather than base load regimes. This creates many challenges to boiler operators due to the advanced age of the power units in service. In Poland, for instance, 77% of power units are more than 20 years old and 45% have been working for more than 30 years, which means that most of them are approaching their design life time. Further operation of these units requires a detailed analysis of the degree of wear of critical pressure components, including a thermal and mechanical stress-state analysis. The paper aims to present a methodology of wear degree calculations incorporated in the power unit control system. The performed calculations are based on real measurement data obtained from 8 months of operation of a boiler unit with the steam output of 650·103 kg/h. Wear degree calculations and a thermal and mechanical FEM-based analysis are performed to assess the possibility of shortening start-ups to address the dynamic requirements that power units operating in the Polish power generation system will have to meet.

show abstract

“…The algorithm allows determination of two-dimensional transient temperature and stress fields within the cylindrical shaped components. The algorithm was presented and the temperature fields were validated in a previous work [1]. In this paper the stresses are examined and validated by means of strain gauges.…”

Section: Introductionmentioning

confidence: 99%

Experimental Validation of An Algorithm for Determining Transient Stresses within Pressure Components by Means of the Tensometric Method

Marcin¹,

Pilarczyk²,

Węglowski³

et al. 2020

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

Determination and validation of transient temperature fields within a cylindrical element using the inverse heat conduction method

Cited by 15 publications

References 12 publications

Heat Transfer Analysis in Cavity of Scroll Compressor Under Clearance Leakage Flow Based on Symlet Wavelet Finite Element Method

Heat Transfer Analysis in Cavity of Scroll Compressor Under Clearance Leakage Flow Based on Symlet Wavelet Finite Element Method

Analysis of long-term operation of the steam boiler live-steam outlet header and assessment of the feasibility of the header operation during accelerated start-ups

Experimental Validation of An Algorithm for Determining Transient Stresses within Pressure Components by Means of the Tensometric Method

Contact Info

Product

Resources

About