DE546133C - Weather cooling by means of a cooling machine installed above the ground - Google Patents

Description

Weather cooling by means of a cooling machine installed above the surface For cooling the air in mines is the use of chillers that Working either above or below ground has been suggested. The preparation of cooling machines underground is, apart from the opposing mountain police Regulations, mostly not possible due to the difficulty of obtaining cooling water.

If you set up the refrigeration machine above days, the result is the difference in altitude, very high pressures in the underground cooling pipe network and the connected air coolers installed on site.

To avoid this inconvenience one has suggested the hot air the heat from a low-tension cooling water flow running completely underground (Secondary current) to be withdrawn, which in turn comes from a surface coming from above and water flow brought back to the surface in a closed pipe (primary flow) is cooled. So here are only the lines for the primary flow for high pressures to calculate; but this method has the disadvantage that underground a special heat exchange device is set up in which the low tensioned secondary current is cooled back by the primary current. Apart from this, that the inclusion of such a heat exchanger causes a considerable loss of deformation with respect to the cold transfer implies, this arrangement still has the disadvantage that the heat exchanger because of the .a sufficient heat transfer the large cooling surfaces required by liquid against liquid are relatively large must get large dimensions and is therefore very expensive. Also the use of cold brine instead of the cold day water used in this process for the primary circuit has similar disadvantages.

According to the invention is therefore of the use of two different Circuits apart and a step forward achieved by the fact that the coolant before being introduced into the cooling pipeline network of the mining operations in an underground plant Turbine or the like is relaxed while performing work. So it becomes the high pressure coolant flow (Water or brine) transformed underground into a low-voltage current.

The turbine power can be used in any way; but it is most useful if this expansion turbine to drive a Pump is used, which is the return of the liquid to the surface standing chiller takes over. , As a result of the in the line network -and in the Turbine occurring. The turbine cannot lose energy on its own do the work required to return the coolant; much more these losses must be compensated for by additional pump work. Appropriate one therefore leaves on the shaft of the expansion turbine, which is directly coupled in a manner known per se and the return pump still an additional engine, z. B. an electric motor, work.

As a rule, the cooling liquid is used in the expansion turbine Relax down to a low final pressure and relieve them immediately with this final pressure Introduce into the cooling pipe network of the mining operations.

In special circumstances, however, it can also be useful or necessary be to carry out the relaxation of the cooling liquid in the turbine completely and then the liquid is passed through a special circulation pump to the individual air coolers on site and to the return pump. In this case it would be completely closed Circulation of the cooling liquid through a container, in which the turbine expanded the Pouring out water, be interrupted.

In the drawing, the method according to the invention is schematic illustrated. A refrigeration machine i is installed above ground, from which the Coolant (cold water or brine) through the line 3 laid in shaft a Expansion turbine q. is fed. The coolant flow is transformed here to a desired low pressure, with which the coolant is then in the line 5 of the pits enters and the individual air coolers set up on site 6 is fed.

The return pump 7 and an electric motor are on the turbine shaft & arranged, which is dimensioned so that it passes through the conduit of the liquid and the relaxation in the turbine compensates for energy losses. the required for the return of the coolant via the line g to the refrigerating machine i Power is therefore shared by the expansion turbine q. and the electric motor 8 given. A Pelton wheel can be used as a water turbine or any other machine Find use.

Claims (1)

PATENT CLAIMS: i. Process for cooling the air in mines by means of one cooled in a refrigeration machine set up above ground and circulated Coolant, characterized in that the cooling liquid prior to introduction into the Cooling pipe network (5) of the mining operations in a machine installed underground, z. B. a turbine (q.), Work is relaxed. z. Method according to claim i, characterized in that the expansion turbine (¢) for driving a pump (7) is used, which is the return of the liquid to the surface standing refrigeration machine (i) takes over. 3. Apparatus for carrying out the method according to claims i and z, characterized .that on the shaft of the in itself known way directly coupled expansion turbine (q) and return pump (7) an additional prime mover, e.g. B. an electric motor (8) works, which the occurring through the conduction of the liquid and during the expansion in the turbine Compensates for energy losses. ¢. Method according to claim i, characterized in that that the cooling liquid in the turbine is expanded to a low pressure and with diesel pressure introduced directly into the cooling pipe network (5) of the mining operations will. 5. The method according to claim i, characterized in that the cooling liquid in the expansion turbine (q.) is completely relaxed and from a switched on A special circulating pump feeds the intermediate tanks to the air coolers of the mines will.