Теплотехническое сравнение вариантов работы системы кондиционирования рудничного воздуха с теплообменником высокого давления и с гидрораспределителем

Abstract

RU: Приведено теплотехническое сравнение вариантов работы системы с теплообменником высокого давления и с гидрораспределителем.

EN: Problem. There are vast losses of cold that take place during the transition of cold to deep horizons of shafts by the mine air conditioning system (MASC) with high pressure heat exchanger. Cold is transferred by the recuperative way. Vast losses of cold mean vast losses of electricity to in order to supply it. Any enterprise requires the reduction of electricity consumption. This article gives proposals on how to replace HPHE into hydrodistributor which will considerably reduce cold losses. A method for mine air conditioning system using HPHE and hydrodistributor. Efficiency factor while using MASC with HPHE and hydrodistributor have been compared.

Literature review. The staff of our Academy has been investigating the problem of HPHE replacement by hydrodistributor in the system of cold–bearer distribution of deep shafts for more than 20 years now. A number of patents and inventor’s certificate were received. Hydrodistributor proposed here has been elaborated for more than 10 years. There are no hydraulic impacts in this hydrodistributor at switching hydraulic flows.

Aim. A method of thermotechnical calculation of HPHE functioning and hydrodistributor of mine air conditioning system have been proposed. Efficiency factor while using HPHE and hydrodistributor have been calculated. The main task of the article is to show the efficiency factor of HPHE and hydrodistributor as well as to compare their efficiency.

Consequently, the variant with hydraulic distributor ensures a better use of exergy which results in higher thermodynamic indexes.

When the cold is transferred to deeper horizons with high pressure thermal exchanger, the cold is transferred by means of recuperation, whereas with hydraulic distributor it goes through the latter directly to air coolers in the bottomholes. By means of this, effective air cooling in the bottomhole is achieved and energy resources can be saved.

Heat engineering comparison of the variants of mine air conditioning system operation with high pressure thermal exchanger and a hydraulic distributor has shown that while working with high pressure thermal exchanger ŋ = 18,49 %, whereas the same for hydraulic distributor is ŋ = 98,55 %.

Conclusion.

1. In the process of cold transition to deep horizons with the help of high pressure thermal exchanger, the cold is conveyed in a recuperative way, whereas with hydraulic distributor it goes through the distributor it is conveyed directly to air–cooling unit in the bottomhole. By means of this effective air cooling is achieved.

2. A very small exergy loss is registered while cold bearer transition to deep horizons by hydraulic distributor. In such way energy resources are used more effectively.

3. Thus, it can be observed that the operation of the system with hydraulic distributor will be more efficient, with smaller exergy losses for cold conveyed to air cooling units.

4. Thermal technical correlation of performed for different variants of mine air conditioning with high–pressure thermal exchanger and hydraulic distributor has shown that while working with ŋ = 18,49 % and with hydraulic distributor it is ŋ = 98,55 %.