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| Number | Title | Issue Date |
| 7588368 | System for diagnosing temperature sensor operation in an exhaust gas aftertreatment system A system and method are provided for diagnosing temperature sensor operation in an exhaust aftertreatment system. Temperature signals from first, second and third temperature sensors and a flow signal are received by a control circuit. The three temperature sensors ... | 09/15/2009 |
| 7428919 | Method and system for evaluating fluid flow through a heat exchanger A heat exchanger evaluation system (84) includes a refrigeration subsystem (126) and a platform (94) in communication with the subsystem (126) for attachment of a heat exchanger (32). The system, (84) further includes a ther... | 09/30/2008 |
| 7293605 | Feed-back control system for heat exchanger with natural shedding frequency The invention relates with the feed-back control system of a heat exchanger by use of the flow resonance phenomenon which maximizes the heat transfer efficiency by generating the flow disturbances of a heat transfer medium. If a heat transfer medium is periodically ... | 11/13/2007 |
| 7097351 | System of monitoring operating conditions of rotating equipment A monitoring system for rotating equipment includes detection of temperature conditions in various areas of the system including motor and pump bearings, mechanical seal environment including seal flush, seal cooler and seal reservoir and process fluid temperature. ... | 08/29/2006 |
| 7077563 | Deposition sensor based on differential heat flux measurement An apparatus and method for the monitoring and measurement of chemical and/or biological deposition in heat exchangers and other fluid processing vessels. The new and original sensing system includes at least two hollow fluid vessels conductively mounted across a co... | 07/18/2006 |
| 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 |
| 7003418 | Methods and systems for temperature compensation of physical property sensors Temperature compensation methods for physical property sensors are disclosed herein, based on a simple bridge circuit. An imbalance of the bridge circuit can be driven to a zero value, while a supply voltage thereof is simultaneously driven to a level required to br... | 02/21/2006 |
| 6960017 | Non-invasive energy meter for fixed and variable flow systems An energy metering method and apparatus for liquid flow systems comprising first and second segments of one or more conduits through which a liquid flows, comprising: attaching a first temperature sensor for connection to an outside of the first conduit segment; att... | 11/01/2005 |
| 6931352 | System and method for monitoring the condition of a heat exchange unit A system and method for monitoring the effectiveness of a heat exchange unit, which comprises at least one or more sensors for taking a plurality of temperature readings of a heated fluid, a coolant and fluids passing through the heat exchange unit. The temperature ... | 08/16/2005 |
| 6893152 | Method and device for evaluating a fuel gas wobbe index A method for evaluating the Wobbe index of a fuel gas belonging to a family of gases. The method includes measuring mass flow rates the fuel gas and of a reference gas, which is not necessarily a fuel gas at respective absolute pressures and temperatures and in a so... | 05/17/2005 |
| 6627451 | Process and device for measuring combustion heat in a calorimetric bomb A water bath accommodating a calorimetric bomb (2) for measuring the combustion heat of substances with the aid of a calorimeter. The inner tank (3) is enclosed by an outer container (5) forming a water jacket and is shielded from the environment. If seve... | 09/30/2003 |
| 6434505 | Method for determining the instantaneous winding temperature of the stator winding of a three-phase AC motor, in particular a pole-changeable asynchronous motor The invention relates to a method for determining the winding temperature (TW) of the stator winding of a three-phase AC motor, in particular a pole-changeable asynchronous motor. For determining the winding temperature (TW) of the stator winding of three... | 08/13/2002 |
| 6241383 | Heat exchanger maintenance monitor apparatus and method A device for monitoring heat transfer systems. A non-heated temperature sensor is used to determine the approximate temperature of a flowing fluid being monitored. A heated temperature sensor is exposed to and is thereby cooled by the flowing fluid being ... | 06/05/2001 |
| 6234670 | Temperature sensing of flowing liquid Apparatus for sensing the temperature of a flowing liquid includes a molded plastic fitting having a stream divider extending across a liquid flow passage. A temperature sensor encapsulated in the stream divider senses the temperature of a liquid stream f... | 05/22/2001 |
| 6132085 | Temperature sensing of flowing liquid Apparatus for sensing the temperature of a flowing liquid includes a molded plastic fitting having a stream divider extending across a liquid flow passage. A temperature sensor encapsulated in the stream divider senses the temperature of a liquid stream f... | 10/17/2000 |
| 6019505 | Time lag approach for measuring thermal conductivity and specific heat A method and apparatus for providing a more direct approach to determine the thermal conductivity, thermal diffusivity and specific heat of a fluid of interest, independently of the amplitude of the sensor output. This is preferably accomplished by measur... | 02/01/2000 |
| 5707150 | Apparatus for computing BTU content in a sample of gas An apparatus for measuring the BTU content of a gas includes a source of combustion air, a detector and a sample loop or tube connected to a six-port switching valve. The switching valve allows accurate and repeatable quantities of the gas to be obtained ... | 01/13/1998 |
| 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 |
| 5324111 | Steam flow meter A steam flow meter provided with a steam flow rate detecting device and a steam pressure and temperature detecting device. In order to accurately maintain the heating temperature of the material to be heated without provision of any further measuring devi... | 06/28/1994 |
| 5215704 | Method and apparatus for in situ testing of heat exchangers Using the method of this invention, the performance of a heat exchanger is determined by measuring the heat transfer capabilities of an individual tube. A relatively small reservoir of service fluid is connected to the inlet and outlet ports of a tube. Th... | 06/01/1993 |
| 5163753 | Differential thermal analysis calorimeter for thermal hazard testing There is provided a differential thermal analysis calorimeter for performing thermal hazard testing procedures which can be utilized as an ancillary plug-in device with commercial thermal analysis data acquisition systems. Simultaneous measurement of heat... | 11/17/1992 |
| 5125753 | Device to measure flow-through and/or quantity of heat A heat circuit comprises an initial conduit containing a flow medium and a return conduit. A choke element located in a conduit such as the initial conduit of a heat circuit serves to control the flow of the flow medium. The choke element has several acti... | 06/30/1992 |
| 5083438 | Chiller monitoring system A method and apparatus for measuring and monitoring critical parameters of a chiller, such as the chiller efficiency. Specifically, temperature and pressure sensors are disposed in the inlet and outlet lines of a condenser and chiller unit. A sensor is al... | 01/28/1992 |
| 5026171 | Apparatus for flow rate and energy transfer measurements Temperaature sensors at the inlet and outlet of a heat exchanger are utilized in the disclosed apparatus to measure the temperature of the fluid and to ascertain the the time taken by a localized gradient in heated or cooled fluid to pass through the heat... | 06/25/1991 |
| 5004354 | Heat transfer measurement Heat transfer between a surface and an environment, such as a steam/air mixture in a pressure vessel, is determined by directing heat transferred to the surface to a location away from the environment by use of a heat pipe. The heat content of the working... | 04/02/1991 |
| 4928751 | Computer controlled waste heat reclaimer A waste heat reclaimer takes in hot waste gases from stacks or flues, associates them with a primary flow of water, heating the water and cooling the gases. The heated water flows through a heat exchanger transferring that heat to a secondary flow of wate... | 05/29/1990 |
| 4881185 | Method of measuring temperature and apparatus for effecting the method In a method and apparatus for measuring temperature by using a state change of a working fluid, a temperature measurement is executed in a manner such that the working fluid is initially supplied at a constant mass flow rate into a flow channel having a t... | 11/14/1989 |
| 4810100 | Ultrasonic energy transfer sensing system A system is disclosed for determining the energy transfer across a heat exchanger having an upstream side and a downstream side and mounted within a conduit through which fluid flows, the system including an ultrasonic transmitter for transmitting ultraso... | 03/07/1989 |
| 4773023 | Apparatus for measuring the rate of heat dissipation Apparatus for measuring the rate of sheet dissipation from a load immersed in a flowing fluid includes an upstream and downstream transducer. These transducers are located upstream and downstream of the load for providing an upstream and downstream signal... | 09/20/1988 |
| 4676433 | Regulating means for controlling the supply of heat to a confined space, and means for establishing when the heating requirement of an air mass exceeds a pre-determined value, and by how much A regulating arrangement intended for supplying heat to a confined space, including a heating source (13), a regulating means (12) intended for regulated heat supply from the heating source, a device for detecting one or a plurality of measurement values ... | 06/30/1987 |
| 4668102 | Temperature and flow station A system for determining the flow rate and temperature of air moving through a duct including a sampling or sensing head for sampling the air moving through the duct, a flow rate sensor connected to the sensing head for providing an output signal relating... | 05/26/1987 |
| 4618266 | Measurement of energy in flowing fluid Energy transmitted to a load in a fluid medium is measured utilizing a probe having an elongate heat transmitter that includes a sensing tip at one end, a heat exchanger at its opposite end, a thermal impedance forming at least a segment of the heat trans... | 10/21/1986 |
| 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 |
| 4531843 | Calorimeter A calorimeter for the measurement of a quantity of heat given up by a fluidic medium in at least one heat exchanger, with an impellerless flow velocity measuring device as well as temperature sensors for determining the forward flow-return flow temperatur... | 07/30/1985 |
| 4428328 | Steam boiler heat recovery apparatus A boiler blowdown heat recovery system is described herein which includes conduit means for directing the blowdown water and fresh water through a heat exchanger, and metering and display means are included for showing the volumetric flow of the blowdown ... | 01/31/1984 |
| 4308992 | Metered-usage variable-volume air distribution system A system for apportioning the operating costs of a central, constant-temperature, constant-pressure, variable-volume air conditioning or heating system among its multiple users. Meters at each unit measure the cumulative volume of air received on thermost... | 01/05/1982 |
| 4306293 | Energy monitoring system The individual energy monitor in a multiple unit complex includes means for measuring the temperature differential at the inlet and outlet of each consuming unit. An on-site microprocessor functioning as a muliple meter unit is coupled to all such consumi... | 12/15/1981 |
| 4302943 | Method of measuring heat influx of a cryogenic transfer system A method is provided for measuring the heat influx of a cryogenic transfer system. A gaseous phase of the cryogen used during normal operation of the system is passed through the system. The gaseous cryogen at the inlet to the system is tempered to duplic... | 12/01/1981 |
| 4303982 | System for the measurement and control of the heat input to a gas burner A system for the measurement and control of the rate of BTU input to a gas burner wherein a signal is generated corresponding to the square root of the product of the burner inlet pressure multiplied by the in-situ density olf the gas, which, multiplied b... | 12/01/1981 |
| 4196628 | Portable psychrometric test apparatus and method for air conditioning equipment A portable in situ psychrometric test apparatus and method for determining, without the use of standard environmental test rooms, the capacity that an air conditioner would exhibit when operated under predetermined standard environmental test conditions. ... | 04/08/1980 |
