Topic
Thermal mass flow meter
About: Thermal mass flow meter is a research topic. Over the lifetime, 1759 publications have been published within this topic receiving 21878 citations.
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Patent•
27 Sep 2001
TL;DR: In this paper, a mass flow sensor and a measuring apparatus is presented, which consists of a structure that mounts and/or houses a hybrid ceramics having a combined construction including a boundary dividing a static temperature coefficient thermistor and, as an insulator, a supporting body.
Abstract: The present invention discloses a mass flow sensor and a measuring apparatus, and more particularly, to a mass flow sensor comprising a structure that mounts and/or houses a hybrid ceramics having a combined construction including a boundary 4 dividing a static temperature coefficient thermistor 2 and, as an insulator, a supporting body 3 ; with electrodes 5 and 5 ′ and the insulation coating and thermal conductive metal, characterized in that it electrically insulates outer side of the thermistor 2 with the supporting body 3 in order to equip the resister thermistor having greater static temperature coefficient than existing platinum or nickel elements while self-limited exothermic temperature within the conduit 11 , enables the temperature sensor and mass flow sensor to directly detect fluid inside of the conduit to achieve speedy detection and accurate measurement of flow, and to minimize heat loss from terminal portions and to solve decrease of sensing capability of sensor caused from latent heat of the insulator; and a measuring apparatus comprising the above mass flow sensor together with temperature compensating device to detect variation of mass depending on temperature of fluid.
10 citations
Patent•
12 May 2005
TL;DR: In this paper, a dynamic heat flow meter is provided which introduces a measured air flow into the system adjacent the test sample (e.g., insulation product), for which thermal properties are to be measured.
Abstract: A dynamic heat flow meter is provided which introduces a measured air flow into the system adjacent the test sample (e.g., insulation product), for which thermal properties are to be measured. The heat flow meter then measures thermal properties (e.g., thermal conductivity and/or heat capacity) of the test sample taking into account air flow through and/or adjacent the test sample.
10 citations
TL;DR: In this article, a reversible flow meter designed to work as part of a soil moisture flow gauge is described, where the flow is measured by forming drops of water in a less dense non-miscible liquid and electrically recording the drops.
Abstract: A description is given of a reversible flow meter designed to work as part of a soil moisture flow gauge. The flow is measured by forming drops of water in a less dense nonmiscible liquid and electrically recording the drops. The operating characteristics are discussed and an empirical equation giving the effect of temperature and flow rate on drop size is derived.
10 citations
TL;DR: In this article, a two-dimensional (2D) flow sensor for the measurement of both flow direction and speed is described, by integrating two couples of silicon spreading-resistance temperature (SRT) sensors in two perpendicular directions on the surface of a silicon chip.
Abstract: A simple silicon two-dimensional (2D) flow sensor for the measurement of both flow direction and speed is described. By integrating two couples of silicon spreading-resistance temperature (SRT) sensors in two perpendicular directions on the surface of a silicon chip, this sensor can detect flow speed and flow direction φ in a full range of 360°. Experimental results confirm theoretical analysis that the output of the sensor increases with the square root of the flow velocity, and the outputs in the two perpendicular directions are proportional to sin φ and cos φ, respectively. The effects of sensor layout are also discussed. With complete oxide isolation for the SRT sensors, the flow sensor could achieve higher sensitivity by operating above the intrinsic temperature of silicon (∼150 °C), or could be used to detect fluid flow at a temperature as high as 300 °C.
10 citations
TL;DR: In this paper, a bypass type flow meter with a permanent magnet flow meter as sensor in the bypass line is selected for the flow measurement in the 800NB main secondary pipe line of 500 MWe Prototype Fast Breeder Reactor (PFBR), which is at the advanced stage of construction at Kalpakkam.
10 citations