Class 374/42 - Throttling calorimeter (e.g., steam quality)

Subclass of Class 374 - Thermal measuring and testing
Definition: Subject matter for measuring a heat energy property of a
No. of patents: 26
Last issue date: 01/24/2012

Number	Title	Issue Date
8100580	Measurement of steam quality in steam turbine A solution for measuring steam quality in a steam turbine is disclosed. A steam quality measurement (SQM) device and an ejector are coupled to a steam turbine through an appropriate piping configuration to draw steam emitted from the turbine through the SQM device f...	01/24/2012
7367241	Differential pressure type flowmeter and differential pressure type flow controller A differential pressure type flowmeter comprises an orifice, a detector to detect a fluid pressure P1 on the upstream side of an orifice, a detector to detect a fluid pressure P2 on the downstream side of an orifice, a detector to detect a flui...	05/06/2008
7069976	Method and arrangement for controlling the temperature of the outstream flow from a heat exchanger and measuring produced heat Process and device for controlling the temperature of an outbound secondary flow in a secondary circuit from a heat exchanger by a primary flow in a primary circuit, via a member that regulates the primary flow, influenced by a control unit. The enthalpy difference ...	07/04/2006
7056038	Media printer for continuous printing of different documents A printer is provided with a buffer to receive document data. Document data is read from the buffer by a control system and information is printed by one or more printhead assemblies in accordance with document data read by the control system from the buffer. The pr...	06/06/2006
6044804	Method and device for monitoring a feedwater supply to a steam generator A method for monitoring a feed-water supply to a continuous-flow or once-through steam generator, wherein steam temperature of evaporated feedwater is employed for determining a feedwater supply rate in the method, includes indicating an actual value of t...	04/04/2000
5731517	Measuring device used in a four-parameter measuring system and in a high temperature and high pressure condition A measuring device used in a four parameter measuring system for measuring simultaneously temperature, pressure, flow rate and steam quality of steam injection profiles during heavy oil recovery by steam injection, comprising: a cable cap, arranged at the...	03/24/1998
5663491	Method for steam quality measurement Steam quality in flow lines equipped with orifice meters may be determined by injecting a predetermined quantity of water into the flow line and measuring the orifice pressure differential with and without water injection. An approximation of the James co...	09/02/1997
5363905	Method of controlling heat exchangers using enthalpy flow as the correcting variable A method of controlling a heat exchanger wherein the enthalpy flow into the heat exchanger serves as a correcting variable. The robust and versatile control method is particularly suitable for use in endothermic reactions and for distillation....	11/15/1994
5327772	Steam quality sensor A method and apparatus are disclosed for determining steam quality wherein heat is added to or removed from a sample flow of steam to reach a point of superheating or subcooling. The amount of energy required to superheat or subcool the sample is factored...	07/12/1994
4932788	Monitoring of the quality of a flowing vapor An improved monitoring of the quality and heat value of a flow of condensable vapor. A small side stream of representative vapor sample is tapped from the flow in the vapor main by utilizing the difference between the dynamic pressure of the vapor at a sa...	06/12/1990
4854725	Multi-sensor steam quality monitoring means and method A system of the present invention monitors the quality of steam flowing in a pipeline includes a test cell which is connected inline into the pipeline and has the steam flowing through it. A plurality of electrodes are located within the test cell and coo...	08/08/1989
4849988	Apparatus and method for measuring the quality of steam Steam quality measuring and monitoring apparatus and methods which measures the quality of steam flowing in a steam pipe includes a test cell connected in line with the steam pipe so that the steam flows through the test cell. The capacitance, the dielect...	07/18/1989
4832503	Steam quality monitoring means and method The present invention is an apparatus and method which monitors the quality of steam flowing in a pipe. A steam sensor located in the pipe provides a steam signal which is frequency related to the quality of the steam flowing in the pipe. A network connec...	05/23/1989
4833688	Two-phase flow quality measuring device A device and associated method comprising a probe (18) for drawing throttled two-phase steam into a tank (26) which has been evacuated and which can be closed when the pressure of the sample steam in the tank equals the pressure of the source steam mixtur...	05/23/1989
4769593	Method and apparatus for measurement of steam quality A method and apparatus for directly measuring steam quality in-line. A variable frequency capacitance cell receives a hybrid stream (one having both liquid and vapor phases). The resultant frequency of the electrical circuit of which the capacitance cell ...	09/06/1988
4753106	Steam quality meter A meter measures the quality of steam flowing in a conduit. The steam comprises a liquid and a vapor. The meter includes a mixer in the conduit for mixing the steam in the conduit to produce a mixture which has a density representative of the liquid and t...	06/28/1988
4681466	Method for determining quality of reduced quality steam In a steam flow line that is delivering reduced quality steam, there is a method and/or system for determining the quality. It includes the steps of flowing quality steam through a first flow restriction, and mixing a measured quantity of water with the s...	07/21/1987
4679947	Method and apparatus for measuring steam quality A method and apparatus for measuring steam quality of wet or two-phase flowing steam includes a flow-through densitometer comprised of two parallel tubes connected to two common nodes, a vibrator for causing the tubes to vibrate, and a transducer for dete...	07/14/1987
4645635	Method and apparatus for determining the properties of wet steam A partially collimated beam of thermal/epithermal neutrons is transmitted through a small bore pipe in which wet steam flows under a high pressure. A thermal neutron detector measures the transmission of the thermal/epithermal neutrons by the wet steam an...	02/24/1987
4561785	Modified throttling calorimeter Method and apparatus for determining the quality of typical steam used in steam flooding for secondary recovery of petroleum, using a modification of the conventional throttling calorimeter based on thermodynamic properties of the steam. Automatic continu...	12/31/1985
4547078	Method and device for measuring steam quality Method and apparatus for obtaining a sample of the liquid component of steam and determining the quality of steam in a vessel or the like, such as steam flowing in a line used for steam injection in an oil well. The steam quality is determined by the know...	10/15/1985
4542993	Method of measuring quality of steam in a flow fine A method for determining the quality of steam flowing in a line used for steam injection, e.g. in an oil well. It has a vertical loop in the line, with an orifice in the up-flow side. The pressure, temperature and pressure drop at the orifice are measured...	09/24/1985
4509679	Energy use monitoring system The system includes a central fluid heater or cooler and an electrically driven centrifugal pump which pumps fluid therefrom to a supply main from which individual lines lead to each unit supplied. Return lines from each unit bring the used fluid back to ...	04/09/1985
4295368	Method for measuring the full range in quality of a vapor A method for determining the quality of a vapor wherein a representative sample is heated at constant volume to a superheated or compressedliquid state so that a measurement of the pressure and temperature in this state, in addition to knowing the pressur...	10/20/1981
4149403	Determining steam quality Method and apparatus for determining the quality of wet steam flowing in a steam line utilizing the relationship between critical flow pressure (Pc) and upstream pressure (Pu) to develop a critical pressure ratio Pc /P	04/17/1979
4034597	Method and apparatus for measuring steam quality Method and apparatus for estimating steam quality which involves sampling a steam-water mixture and utilizing volume relationships between the volume of initial sample and volume of the sample when water in sample is converted to steam....	07/12/1977

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Class 374/42 - Throttling calorimeter (e.g., steam quality)