词条 | Standard litre per minute |
释义 |
The standard litre per minute (SLM or SLPM) is a unit of volumetric flow rate of a gas corrected to "standardized" conditions of temperature and pressure (STP), which is most commonly practiced in the United States whereas European practice revolves around the normal litre per minute (NLPM).[1]. Until 1982, STP was defined as a temperature of 273.15 K (0 °C, 32 °F) and an absolute pressure of 101.325 kPa (1 atm). Since 1982, STP is defined as a temperature of 273.15 K (0 °C, 32 °F) and an absolute pressure of 100 kPa (1 bar). Conversions between each volume flow metric are calculated using the following formulas: Prior to 1982, Post 1982, {{cn|date=August 2017}}[2] assuming zero degree Celsius reference point for the standard conditions for temperature and pressure when using SLPM, which differs from the "room" temperature reference for the NLPM standard. These methods are used due to differences in environmental temperatures and pressures during data collection. In the SI system of units, the preferred unit for volumetric flow rate is cubic metre per second, equivalent to 60,000 litres per minute. See also
References1. ^Picas, J. A., Punset, M., Baile, M. T., Martín, E., & Forn, A. (2011). Effect of oxygen/fuel ratio on the in-flight particle parameters and properties of HVOF WC-CoCr coatings. Surface and Coatings Technology, 205, S364-S368. 2. ^{{cite web|url=https://www.engineeringtoolbox.com/stp-standard-ntp-normal-air-d_772.html|title=STP - Standard Temperature and Pressure & NTP - Normal Temperature and Pressure|website=www.engineeringtoolbox.com}} 2 : Fluid dynamics|Units of flow |
随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识,基本涵盖了大多数领域的百科知识,是一部内容自由、开放的电子版国际百科全书。