Method for measuring the rate of a fouling reaction induced by heat transfer using a piezoelectric microbalance
US6250140A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 1999 |
| Grant date | Jun 26, 2001 |
| Priority date | — |
| Expiry date | Jun 22, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/0256
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method measuring a rate of fouling caused by a heat flux through the surface subjected to electrochemical polarization. The method includes the steps of: providing a piezoelectric microbalance comprising a piezoelectric material with electrodes disposed thereon; exposing the working electrode of the microbalance to a flowing liquid, the liquid containing at least one fouling forming species; maintaining the liquid at a constant first temperature; maintaining the liquid at required hydrodynamic conditions; applying either a constant heat flux through the microbalance resulting in its working electrode having a variable second temperature or applying a variable heat flux through the microbalance resulting in its working electrode having a constant second temperature; and measuring a rate of fouling on the microbalance surface. The method also comprises measuring the surface density and heat transfer resistance of the deposit independently, thereby the corresponding ratio can be determined contributing to the deposit identification. The working electrode of the microbalance can be subjected to an electrochemical polarization in a wide range to systematically simulate the conditions …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.