ANALYSIS OF THE SAFETY VALVE OPERATION UNDER OVERHEATING CONDITIONS IN CLOSED HEATING SYSTEMS
DOI:
https://doi.org/10.24867/02AM01VlaovicKeywords:
overheating in central heating system, flashing in safety valve, pressure increase.Abstract
The aim of this study is the analysis and evaluation of safety valves in conditions of overheating, for which they are not designed. Their working temperature range is up to 110 and the system may enter the boiling region. Under these conditions, during expansion to atmospheric pressure, flashing may occur in valve, which lead to decrease of the mass flux. The mass flux is calculated with the available methods, which are described in detail.
References
[1] SRPS EN 303-5:2016 - Kotlovi za grejanje na čvrsta goriva, ručno i automatski loženi, nazivne toplotne snage do 500 kW
[2] Darby, R., Meiller, P. R., & Stockton, J. R. (2001). Select the Best Model, (May).
[3] Darby, R., C. (2005). Size Safety–Relief Valves for Any Conditions, Published in Chemical Enginering, 112 , (9), 42–50.
[4] Bolle, L., Downar-Zapolski, P., Franco, J., & Seynhaeve, J. M. (1996). Experimental and theoretical analysis of flashing water flow through a safety value. Journal of Hazardous Materials, 46(2–3), 105–116.
[5] Darby R., & . Raj P.C. (2004). Chemical engineering fluid mechanics, third edition, chapter 11, 291-301.
[6] American Petroluem Institute. (2008). Sizing, Selection and Installation of Pressure Relieving Devices in Refineries, Part I - Sizing and Selection. API Standard 520, (December 2008).
[7] Lees, F. P. (1996). Loss Prevention in the Process Industries: Hazard Identification, Assessment and Control, 1, 3776.
[2] Darby, R., Meiller, P. R., & Stockton, J. R. (2001). Select the Best Model, (May).
[3] Darby, R., C. (2005). Size Safety–Relief Valves for Any Conditions, Published in Chemical Enginering, 112 , (9), 42–50.
[4] Bolle, L., Downar-Zapolski, P., Franco, J., & Seynhaeve, J. M. (1996). Experimental and theoretical analysis of flashing water flow through a safety value. Journal of Hazardous Materials, 46(2–3), 105–116.
[5] Darby R., & . Raj P.C. (2004). Chemical engineering fluid mechanics, third edition, chapter 11, 291-301.
[6] American Petroluem Institute. (2008). Sizing, Selection and Installation of Pressure Relieving Devices in Refineries, Part I - Sizing and Selection. API Standard 520, (December 2008).
[7] Lees, F. P. (1996). Loss Prevention in the Process Industries: Hazard Identification, Assessment and Control, 1, 3776.
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Published
2019-03-06
Issue
Section
Mechanical Engineering
