SU1236266A1 - Heating device - Google Patents

Description

one

The invention relates to devices for space heating, in particular to heaters with an intermediate coolant.

The aim of the invention is to increase efficiency by intensifying heat exchange.

FIG. 1 shows a heating device, a longitudinal section; Ia figure 2 - section aa in figure 1; on fig.Z - section bb in figure 2.

The heating device contains a sealed enclosure 1 with a gas volume 2 and at least two immiscible heat transfer fluids 3 and 4, of higher and lower density, formed, the first of which has a lower boiling point, liquid volume, and a heater 5 immersed in it. The liquid volume is divided into compartments by a partition 6 with a bypass opening in the form of a system of holes 7 with a total flow area of 0.015–0.03 from the partition wall 6. The heater 5 is installed in the housing 1 under the partition 6. The volume is more deleterious heating medium 4 in 1,8-2,5 times the gas volume 2 of the housing 1. Further, a heater 5 may be made electrically, as a more dense heat medium water can be selected, and a less dense - oil.

Heating device works as follows.

When voltage is applied, the heater 5 transfers its heat to heat carrier m 3 and 4 (oil, water), while water 4 begins to boil and water flows 4 through the openings 7 of the partition 6 are bubbled through the volume of May

ten

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36266

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3 and get into the gas volume 2, where due to cooling of the outside air they are condensed to the walls of the housing 1, they drain into the lower part of the housing 1, then the process is repeated. The presence of holes 7 in the horizontal partition 6, located close to the wall of the cornus 1, allows turbulization of the near-wall boundary layer due to the directional movement of the bubbles and thereby reducing the main thermal resistance from the oil volume side 3. In addition, water condensation vapor in the zone of gas volume 2 increases the thermal conductivity of the latter, intensifies the heat transfer device. An increase in the volume of water 4 in the volume of oil 3 over 1.8-2.5 gas volumes 2 (at a fixed and constant power input) increases the heating time of the device to a given temperature, since the heat capacity of water 4 is about 2 times greater than the heat capacity oil 3, moreover, at steady state gg, this leads to an increase in pressure inside KOfinyca 1, which reduces the reliability of the device. i; vif the reduction of the volume of water 4 is less than 1.8-2.5 gas volumes 2 of boiling water 4 up to the upper part of the device. Increasing or decreasing the number and size of the holes 7 also affects the organization of the movement of the bubbles in the near-wall zone of the housing 1, i.e. in the zone of greatest internal thermal resistance.

Such an embodiment of the heater reduces the time required for the output ;; on the established temperature rezhi,), to increase the internal heat transfer of the intermediate coolant and to reduce the energy consumption of the device during operation.

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25

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Editor V. Ivanova Order 30 1/41

VNIIPI USSR State Committee

for inventions and discoveries

113035, Moscow, Zh-35, Payujcxan nab. D. 4/5

Phil.alial PPP "Patent, Uzhgorod, st. Project, 4

Tehred and Veres Circulation 649

Corrector. I Subscription

FIG. 3

Corrector. IJJapoijiii Subscription

Claims (1)

A HEATING DEVICE comprising a sealed housing with gas and liquid volumes, immersed in the last heater, and divided into compartments by a horizontal partition with a bypass opening, the liquid volume being formed by at least two immiscible heat carriers with a higher and lower density, the first of which has a lower boiling point, characterized in that, in order to increase efficiency by intensifying heat transfer, the heater is installed under the partition, the bypass of which you olnen in the form of holes with a total flow area constituting 0.015-0.03 square partitions, and the volume of coolant in the denser 1.8-2.5 times the gas volume of the housing. FIG. / oo oo