Apparatuses for measuring the flow rate of a flowing medium
Device for measuring the mass flow and the heat flow and method for determining the mass flow Patent #: 4355908
ApplicationNo. 06/501009 filed on 06/03/1983
US Classes:374/41, Signals combined electrically165/47, STRUCTURAL INSTALLATION374/20, Controlling heating or cooling374/35, Heat absorbing heigh temperature gas probe (e.g., enthalpy or fluid cooled probe)374/39, Gain or loss of heat by heat utilizing load in path of heat exchange fluid374/40Determined by combining flow rate and temperature signals of heat exchange fluid
ExaminersPrimary: Frankfort, Charles E.
Assistant: Will, Thomas B.
International ClassesG01K 17/06 (20060101)
G01K 17/00 (20060101)
AbstractEnergy 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 transmitter, and temperature sensors spaced apart along the impedance. The temperature of the sensing tip is maintained different from that of the sensed fluid. A read-out is responsive to the temperature sensors and it is calibrated in terms of the energy content of the fluid flowing in the sensed passage. Corrections for various factors of error are incorporated in the read-out. A relative simple yet reasonably accurate measure is made of the energy in steam, where the heat exchanger of the probe is a passive heat dissipator. By controlling the heat exchanger so as to maintain the sensing tip at the temperature of the fluid in a reference condition, measurement of the energy content of the fluid in another condition is made, this being applicable not only to steam systems but also to forced air heating and cooling systems as well as circulating liquid heating and cooling systems.
Field of SearchGain or loss of heat by heat utilizing load in path of heat exchange fluid
Determined by combining flow rate and temperature signals of heat exchange fluid
Signals combined electrically
HEAT FLUX MEASUREMENT
By differential temperature measurement along undisturbed thermal gradient
Heat absorbing heigh temperature gas probe (e.g., enthalpy or fluid cooled probe)
By fluid flow within or to sensor (e.g., convection, heat transfer, differential pressure)