Method and device for monitoring the efficiency of a condenser
AssigneeTaprogge GmbH
InventorsKlaus Eimer, Wolfgang Czolkoss
Life of this patent
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Abstract
The invention relates to a method and to an apparatus for monitoring the heat transfer and therefore the efficiency of a condenser. A water column is formed by shutting off a condenser pipe which assumes the steam temperature T.sub.s and whose outflow time after the resumption of the flow can be utilized for measuring the flow velocity. With the knowledge of the water inlet temperature T.sub.1 and the water outlet temperature T.sub.2 measured on the same condenser pipe, it is possible to very accurately establish the heat transfer through the measured condenser pipe, so that on the basis thereof it is e.g. possible to operate a cleaning system with foam rubber balls. Thus, each fraction of the possible efficiency of the condenser is exploited.
Claims22
A method for monitoring the heat transfer and, therefore, efficiency of a condenser, in which water inlet temperature T.sub.1 of cooling water flowing into a condenser tube having an inlet and an outlet is measured by means of a first temperature sensor, water outlet temperature T.sub.2 of said cooling water flowing out of said condenser tube is measured by means of a second temperature sensor, steam temperature T.sub.s, and water flow velocity are measured, in order to calculate a heat transmission coefficient on the basis of said temperatures T.sub.1, T.sub.2, T.sub.s, and said water flow velocity, comprising the steps of:
- temporarily interrupting water flow through said condenser tube so that a water column contained therein is heated up to said steam temperature T.sub.s as measured at said outlet of said condenser tube,
- resuming, after said water column reaches said steam temperature T.sub.s, said water flow through said condenser tube, and
- measuring velocity of said water flow through said condenser tube by monitoring said water outlet temperature T.sub.2 and evaluating time elapsed between said resumption of said water flow and a point in time where said water outlet temperature T.sub.2 reaches approximately a previous value prior to said temporary interruption of said water flow.
Apparatus for monitoring the heat transfer and therefore efficiency of a condenser, comprising:
- a thermometer in a water entrance area for determining a water inlet temperature T.sub.1 of water,
- a temperature probe in an end region of a specific condenser tube for determining a water outlet temperature T.sub.2 and a steam temperature T.sub.s, and
- means for evaluating said temperatures with respect to time, computing a water flow velocity therefrom, and computing a heat transfer from steam into said water, wherein said condenser tube (6) can be temporarily shut off with the aid of a sealing element (11).
Dependencies are inferred from the claim text.