Patent · US Expired

Classification of the surface structure of heat exchanger tubes by means of doppler radar spectroscopy

US6522153B2 · kind B2 · utility

1Cited by

4References

7Claims

0Family size

Assignee

Wieland-Werks AG · DE

Inventors

Gert Mueller · New Albany, US
Joachim Riedle · Bad Wurzach, DE
Wolfgang Mueller · Rutesheim, DE

Key dates

Filing date	May 22, 2001
Grant date	Feb 18, 2003
Priority date	—
Expiry date	May 22, 2021

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF28F13/18
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for the quick classification of structured inner and/or outer surfaces of heat exchanger tubes by means of Doppler radar spectroscopy.The measured variables are determined from the frequency spectra.Surface integral A, average value m and variance S (or standard deviation &sgr;={square root over (S)}) correlate directly with the geometric parameters of the structure morphology. They permit direct conclusions regarding the heat transfer characteristics (evaporation/condensation performance) of the respective structure, in particular no tube samples ready for use are needed for the heat transfer classification.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.