SU717636A1 - Device for investigating heat exchange dependence upon electric fields - Google Patents

Description

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The invention relates to thermal physics and can be used in the study of i: electric fields flowing into heat exchange between a solid with an electrically conductive surface and electrophysical liquids or gases. the properties and mechanism of the electrical conductivity of liquids and gases in the presence of a gradient-temperature in the latter, and also as a sensor of various quantities (pressure, humidity, pressure, content and type of gas, etc.).

Various devices are known for studying the effect of electric fields on heat transfer.

The known device, which contains a heat-generating body, is a platinum wire heated by electrical current, which serves simultaneously as a resistance thermometer, located axially inside the hollow metal cylinder. The wire and the cylinder are connected to a high voltage source

With this and similar devices it is established that the electric field. an intensifying effect on heat transfer, and in gases a sharp and maximum effect of the floor is observed when a corona discharge occurs on a heat-releasing surface. . The amount of the intensification effect is determined by the expenditure of additional energy for heating the wire in the field to the temperature it has in the absence of an electric field. The temperature of the wire is monitored by measuring its electrical resistance to the wire.

Claims (1)

It is also known a device containing a hollow electrically conductive cylindrical case to which one of the high-voltage source batteries is connected and a semiconductor tamper resistor (t) is installed inside the hollow metal Skindra and is in contact with it, and one terminal is electrically connected to another terminal. voltage source 2. The electric field is estimated from information obtained from the static volt-ampere characteristics of the thermometer taken at Alice and the absence of high voltage. The real disadvantage of this arrangement is the limited range of Wg; SLEEP WARMING FROM ACCURACY BY VARIABLE NON-STRESSES OF APPLIED ELECTR. R.-,--. - "- one ,- .- . . -. „- - i --- .----. ..-- -.v, -: -. ,,. 4. --- ..--- i -.----- --- {Eichgbsk: yx fields, that, in 4acTHocfH, Fayal is impossible. use of thermodynamic in the study of the effect of the corona on heat transfer 6gas. The electrical connection of a high-voltage power supply with a low-voltage power supply and thermistor measurement negatively affects the accuracy, ia sometimes and the reliability of a pesyjibtiaTOB, in particular, the conductivity of liquids and gas, and imposes a condition of careful and difficult, and difficult, and difficult, and difficult to work. electrical insulation measuring instruments, the purpose of the proposed. the invention - the expansion of the field of research, heat exchange, injectivity and increased sensitivity of the device; . The goal is achieved by applying a dielectric coating on the body of TepMBCTopaf, followed by metallization of its outer surface and connecting metallized pnosnos. This is one of the terminals of a high-voltage source, and the Fukopodvod of the thermistor wire is electrically not electrically charged and has a medium source and may not be located in the external field at all. Applying a dielectric cover to the Thermistor thermistor minimizes the effect of any kind of interference present in any high-voltage device chain, on the accuracy of the read results ,. gives the possibility to easily obtain the surface of the desired shape without burrs and edges, which are the cause of probes of the interelectrode space, which prevents the achievement of the desired strengths of the electric-field, in particular, corona discharge in gases. . The metallization of the dielectric surface fully satisfies the requirements; Presented to the United States of America 1ShSh shr nos y Yplbv1 Shshshshshgg eklyuyuyuchmr l in the presence of Mvgtal ichёSko- S sJiV - ii -; - -; iS; -; - grlr minimally POSSIBLE crowds without sharp edges and bustle, which is extremely important for even 6m | $ shiu:; f; .5 - -r ;; - 4i:; :: i; 7 6 laziness of the corona shell on the heat-removing surface. The use of metallization can significantly reduce the inertia and increase the sensitivity of the device due to a decrease in the mass of the sensor. In addition, metallization makes it possible to investigate the effect on heat transfer of the widest range of metal coatings (including coatings of precious metals), which are significant. ecology Nafig 1 dan is a common yoid rtpeiinaiaeMo-; first device; in fig. 2 - possible options for its adoption. ,.,., Case 1, with an electrically conductive surface facing the thermometer, from which wire 2 (B6ICOIXIX) of voltage & y goes out, is made in the form of a hollow cylinder, the Heat & Splitting body is located on the base. microthermistral type MT-54 tsyi VG Karmanova. Semiconductor first thermistor body; 3 covered with a layer. 4 glasses, a layer of 5 copper is applied to the surface of the chemical method, from which the high-voltage wire 6 departs. The two conductors 7 of the thermistor OUTPUT on one side and for the prevention of contact are separated from each other by a glass partition 8. The fluoroplastic housing 9 is designed to concentrate the electric field only on the semiconductor body of thermistor 3.. : h. . Since the device can be Irpolzrvanr as a sensor is different. values (for example, humidity, pressure, speed, content and type of gas), then depending on the requirements imposed on it, the body may have any suitable shape for the given conditions, up to the needle-like shape. The ability to arbitrarily vary the shape of the body is also important. Therefore, it makes it possible to obtain both unipolar corona discharge and so on. bipolar. The bipolar corona discharge has a case where the conductive surface of the body facing the thermistor also coronades, i.e., has a small radius of curvature. FIG. Figure 2 shows some of the possible embodiments of the device with a body shaped plane (Fig. 2a), a hemisphere (Fig. 26), and a needle (Fig. 2c). The proposed device is used in investigating the effect of a corona discharge on heat exchange in air rfpk at normal pressure and room temperature. The source of the high capr is the stabilized rectifier VS-23. The volt-ampere characteristics of a thermistor, which judge the effect of the FIELD on heat transfer, are measured according to the method commonly used in this method, the values of the high voltage applied, varying from 0 to 10,000 kilovolts. The upper value of the voltage is limited by the breakdown of the Meybeybrodny gap, which is the basis of the development of the corona discharge tia metera (a l: yyyrovayy teylovlyayuyu surface. Usanrvlen that with an increase in the electrical surface of the metal metal surface and the tempered surface, the surface has increased. before the beginning of the coronation, the effect of increasing heat heat does not exceed 5–6%. C, as the corona increases, the heat transfer increases dramatically and increases with increasing voltage, but increases slower, down to breakdown voltages. The application of a dielectric coating of a thermistor followed by metallization; its surface distinguishes the proposed device from the known ones. The device has the following advantages: extending the range of | heat transfer studies to the range of high voltages of the applied electric field, which provides an opportunity to get a corona discharge (both unipolar and bipolar) on the surface of the thermistor if gases are used as heat of the receiving body; an increase in the accuracy of the results read on the low-voltage and high-voltage circuits of the device and a significant decrease in the inertia and, accordingly, an increase in the sensitivity of the temperature sensor. In addition, the possibility of using an arbitrary shape of the body while retaining all the positive features of the device greatly expands the area of application of sensors developed on its basis. Claims of Invention A device for investigating the effect of electric fields on heat transfer in insulating conductors and gases, comprising a conductive case, electrically connected to a high-voltage source, and a semiconductor thermistor, about tl and -. . In order to expand the field of study of heat exchange, reduce inertia and increase sensitivity, a dielectric coating is applied to the body by means of such a thermistor, the outer surface of which is metallized and connected to a high-voltage source. Sources of information taken into account for three examinations 1, US Patent No. 3526268, Cl, 165-1, published. 1970. 2, USSR Author's Certificate MO 496481, cl. Q O1 N 7/16, 1973. J "J . / D 6 ai4ei "K ;; 4" i iw & v-4 iAjf .-; -. FIG. g