Process and device for the determination of the thermal resistance of contaminated heat exchange elements of thermodynamic apparatuses, in particular of power station condensers
US4729667A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 1986 |
| Grant date | Mar 8, 1988 |
| Priority date | — |
| Expiry date | Jun 16, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF28F19/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The process consists in that two comparison tube sections (3; 4), which originate from a single condenser tube and of which one (3) is left in the corroded condition and/or the condition encrusted by mineral deposits and the other (4) is brought into the new condition by etching or other cleaning procedures, are conductively connected in series, and cooling water flows through them and they are heated from the outside in a condenser chamber in each case (1 and 2 respectively) by steam flows of equal power. The temperatures (t.sub.1, t.sub.2 and t.sub.3, t.sub.4 respectively) measured at the inlet and outlet positions of the comparison tube sections (3; 4), the measured values of the mass flow of cooling water (M.sub.w) and the steam temperatures (t.sub.f ; t.sub.b) and the heat flows (Q.sub.kf =Q.sub.kb) in the two condenser chambers (1 and 2 respectively) permit the determination of the thermal resistance (R.sub.f) of the incrustation layer of the tube drawn for the purposes of investigation from the condenser. A device for carrying out the process exhibits two condenser chambers (1; 2) to receive the comparison tube sections (3; 4) and a degassing vessel 11, which communicates wi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.