1. bookVolume 3 (2020): Issue 1 (August 2020)
Journal Details
License
Format
Journal
First Published
30 Sep 2018
Publication timeframe
1 time per year
Languages
English
access type Open Access

Functioning Efficiency of the Central Air-Conditioning System on the Selected Example

Published Online: 10 Aug 2020
Page range: 41 - 55
Received: 01 Feb 2020
Accepted: 01 Mar 2020
Journal Details
License
Format
Journal
First Published
30 Sep 2018
Publication timeframe
1 time per year
Languages
English
Abstract

One of the particularly significant threats during exploitation is the climatic threat, which is associated with an increase in the overall costs that are allocated to combating it. The rise in the virgin temperature of the rock mass by 1oC increases the demand for the required cooling capacity to be taken from the air. The publication assesses the effectiveness of the air-conditioning installation by testing its operation on a selected example. The assessment of the efficiency of the air-conditioning installation for a selected hard coal mine showed that none of the five tested coolers achieved the maximum assumed rated power. The use of total power (7.5 MW) in mining excavations was less than 50% and amounted to η = 0.472%. The research showed that the main reason for obtaining low cooling parameters is the inability to locate them in the place of the highest air temperatures. The other problem is an insufficient airflow rate of cooling water supplied to the coolers at too high temperature. The above considerations indicated that the cooling power from built-in air- conditioning systems is not properly and effectively used. Improving the efficiency of its functioning is possible by proceeding research that will eliminate the above factors and by using air conditioning equipment, taking into account the periodic audit of their work to reduce electricity consumption.

Keywords

Rozporządzenia Ministra Energii z dnia 23 listopada 2016 r. w sprawie szczegółowych wymagań dotyczących prowadzenia ruchu podziemnych zakładów górniczych, Search in Google Scholar

Rozporządzeniu Ministra Środowiska z 1 lipca 2017 roku w sprawie zagrożeń naturalnych w zakładach górniczych, Search in Google Scholar

Guo, P.; Wang, Y.; Duan, M.; Pang, D.; Li, N. (2015): Research and application of methods for effectiveness evaluation of mine cooling system. Int. J. Min. Sci. Technol. 25, 649–654. Search in Google Scholar

Hartman, H.L.; Mutmansky, J.M.; Ramani, R.V.; Wang, Y.J. (1997): Mine Ventilation and Air Conditioning, 3rd ed. John Wiley & Sons, Inc.: New York, NY, USA, 1997; p. 583; ISBN 978-0-471-11635-6. Search in Google Scholar

Maurya, T.; Kailash, K.; Vardhan, H.; Aruna, M.; Raj, G.M. (2015): Effect of Heat on Underground MineWorkers. Procedia Earth Planet. Sci. 11, 491-498. Search in Google Scholar

McPherson, M.J. (2012): Subsurface Ventilation and Environmental Engineering; Springer Science & Business Media. New Delhi, India, Chapter 14; p. 491; ISBN 978-94-011-1550-6. Search in Google Scholar

Millar, D.; Trapani, K.; Romero, A. (2016): Deep mine cooling, a case for Northern Ontario: Part I. Int. J. Min. Sci. Technol. 26, 721-727. Search in Google Scholar

Ramsden, R.; Branch, A.R.; Wilson, R. (2007): Factors influencing the choice of cooling and refrigeration systems for mines. J. Mine Vent. Soc. S. Afr. 60, pp. 92-98. Search in Google Scholar

Szlązak N., Obracaj D., Borowski M. (2005) – Kierunki rozwoju klimatyzacji w polskich kopalniach węgla kamiennego. XXXVII Dni Chłodnictwa: aktualne tendencje w rozwiązaniach technicznych urządzeń i systemów chłodniczych i klimatyzacyjnych. Konferencja naukowo-techniczna, Poznań, 23-24 listopada 2005 Wyd. SYSTHERM Chłodnictwo i Klimatyzacja Sp. z o. o. Poznań, pp. 243-256. Search in Google Scholar

Szlązak N, Obracaj D, Borowski M. (2008a) – Methods for controlling temperature hazard in Polish coal mines. Archives of Mining Sciences, Vol. 53, issue.4, pp. 497-510. Search in Google Scholar

Szlązak N, Obracaj D, Borowski M. (2008b): Forecasting air temperature and humidity in workings with separate ventilation systems and cooling devices of the immediate application using computer software. Wiadomości Górnicze 59 (2), pp. 86-96. Search in Google Scholar

Szlązak N, Obracaj D, Borowski M. (2008a) – Methods for controlling temperature hazard in Polish coal mines. Archives of Mining Sciences, Vol. 53, issue.4, pp. 497-510. Search in Google Scholar

Szlązak N, Obracaj D, Borowski M. (2008b): Forecasting air temperature and humidity in workings with separate ventilation systems and cooling devices of the immediate application using computer software. Wiadomości Górnicze 59 (2), pp. 86-96. Search in Google Scholar

Szlązak N., Obracaj D., Borowski M., Swolkień J. (2009): Methods for improving thermal work conditions in Polish coal mines. Ninth International Mine Ventilation Congress, Oxford & IBH Publishing Co. Pvt. Ltd, New Delhi, pp. 253-262. Search in Google Scholar

Szlązak N., Obracaj D., Głuch B. (2013): Estimation of microclimate condition in longwall excavations in hard coal mines. AGH Journal of Mining and Geoengineering; ISSN 2299-257X. Vol. 37 no. 1, pp. 117-128. Search in Google Scholar

Szlązak N., Obracaj D., Swolkień J. (2018a): An evaluation of and possible improvements of the state of climate hazard in Polish underground mines: a monograph, Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Kraków: Agencja Wydawniczo-Poligraficzna ART-TEKST, 203 pp. ISBN: 978-83-7783-198-4 Search in Google Scholar

Szlązak N., Obracaj D., Swolkień J. (2018b): An evaluation of the functioning of cooling systems in the Polish coal mine industry, [an electronic document]. Electronic journal; ISSN 1996-1073., vol. 11 issue 9, art. no. 2267, pp. 1-5. System requirements: Adobe Reader. Available online since 2018-08-29: https://www.mdpi.com/1996-1073/11/9/2267/pdf Search in Google Scholar

Whillier, A. (1980): Refrigeration applied in the cooling of mines. Int. J. Refrig. 3, pp. 341-345. Search in Google Scholar

WUG (Higher Mining Institute) (2018): An evaluation of the state of work safety, mine rescue operations and public safety in the context of mining and geological activity in 2017 State Mining Authority, Katowice, pp. 1-54. Search in Google Scholar

Vosloo, J.; Liebenberg, L.; Velleman, D. (2012): Case study: Energy savings for a deep-mine water reticulation system. Appl. Energy 92, pp. 328-335. Search in Google Scholar

Recommended articles from Trend MD

Plan your remote conference with Sciendo