DE3440983A1 - Discharge-vortex-type heat exchanger (AWT) - Google Patents

Abstract

Discharge-vortex-type heat exchanger (AWT) as a system for recovering heat by heat conduction from discharged fluids, in particular waste water, to a refrigerant, for example fresh water or cold water, or a vaporising refrigerating agent from a heat pump, which is conducted in reverse flow in a double-pipe continuous-flow heat exchanger. By virtue of a tangential inlet into a reservoir container arranged above the double-pipe continuous-flow heat exchanger, a vortex core is produced in the discharging fluid and produces both an intensive conduction of heat on the inner walls of the core pipe in the heat exchanger and carries through specifically lighter contaminate particles in the centre of the eddy core. The dwell time of the media, which is decisive for the evaluation of heat exchangers, during the conduction of heat by means of the refrigerant is lengthened by a multiple by means of the discharge vortex in comparison with simple discharge.

Description

Sponsorships 3 A 4 O 9 8

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The one that develops in the case of liquids that run off freely from a container after a certain run-off time and run-off constellation Drainage eddy with its vortex core along the center of the drainage pipe delays the drainage process for a fraction of the time without swirl.

This natural effect is used according to the invention to remove heat from z. B. running, warm wastewater and consciously used supported by appropriate measures in such a way that the formation of the vortex is not left to chance.

The warm wastewater flowing into the collection or storage tank the Alil vortex is generated by the tangential inlet itself must be designed for the volume of a simultaneously running amount of water, no influence on the preservation of the AbI on wirb ice.

The funnel-shaped and aerodynamically sensible one Transition to the double-pipe once-through heat exchanger located under the container contributes to the formation of the vortex funnel in the container and ensures the unhindered discharge of entrained Impurities in wastewater.

Along the gas, air-permeated vortex core in sewage drains the center of the inner tube of the double tube once-through heat exchanger and that along a helical line on the inner wall of the inner tube Wastewater moving downwards due to its own gravity is the cause of the long time lag of the run-off process.

According to the different specific weights between the heavier water and the lighter and undissolved impurities it carries with it, the latter are passed through in the vortex core, whereas the water generates a high heat transfer coefficient due to its turbulent contact intensity and speed along a helical line on the inner pipe wall. The described, physically defined, natural effect allows the choice of relatively large drainage cross-sections, which counteracts the risk of clogging.
There is uninterrupted gas or air passage through the entire

Horst Lüeß », Soll Kirchheim

Drainage system is possible, the overflow at the container and the discharge of the wastewater externally via a compensation or Vent line are brought into connection with each other. The heat absorbing refrigerant, z. B. cold fresh water

IfO or cold water, also directly evaporating refrigerant in a heat pump system, flows through äesa in a countercurrent with intensive heat transfer. Annular gap guided from bottom to top. Dam.t the takeover of the heat from the irregularly draining water by the refrigerant is possible, its flow through a regulation and control process must be synchronized with the draining water.

Efforts to date to recover heat from running, warm wastewater are mainly limited to industrially and commercially used cases in which an individual economic benefit is obvious, but not the economic benefit. The costs for the use of apparatus, containers and personnel, and in many cases also the additional energy required, are relatively high.
Heat recovery measures from runoff water in single and multi-family houses are almost completely unknown. In other words, where combustion systems have to accept poor overall efficiencies due to the high operational losses, mainly in summer.

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Claims (1)

Drain vortex - heat exchanger (AWT), as simple, without decisive System for heat recovery that uses external energy from runoff, including heavy contaminants, sewage and other liquids; characterized in that the, mostly without external influences physically defined flow vortices that form in a collecting or storage container (?) through the tangential in the inlet (2) incoming wastewater within the meaning of the invention is intentionally generated artificially. This increases the dwell time of the draining water to be cooled in the double-pipe once-through heat exchanger (3) located under the collecting tank by a multiple of the dwell time without the discharge vortex. At the same time, the vortex core and the helical movement of the freely flowing water along the inner pipe walls of the heat exchanger, which are as smooth as possible and dirt-repellent (^ a highly effective heat transfer and, due to the countercurrent cooling medium (heat-absorbing medium) in the king-size gap Q>) of the double pipe, a known good heat transfer . The heat exchange surface can therefore be chosen to be relatively small. The strong time lag in the drainage process caused by the drainage vortex allows a generous design of the drainage cross-section in the once-through heat exchanger, which also means that it is carried along in the wastewater strong, undissolved impurities do not cause blockages. The outlet (^) of the waste water and overflow (^) are external via a Compensation or Vent line in connection. In order to keep the heat losses to the outside low, the entire Provide the system with carefully selected insulation © on the outside. (Reference symbols in the system diagram, see Appendix 1) Horst Lüeße, Soll Kirchheim