How to distinguish superheated steam from saturated steam? How to calculate the safety valve using SW6 for superheated steam?
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There is a steam cylinder; medium: steam ； Design temperature: 200℃ ； Operating temperature: 180℃ ； Design pressure 1.6 MPa ； Working pressure: 1.0 MPa. I. How to determine whether the medium in this steam distribution cylinder is superheated steam or saturated steam? II. Additionally, this steam cylinder is equipped with a safety valve. When using SW6 to perform calculations for the overpressure relief device of the safety valve, what medium type should be selected if the steam is superheated or unsaturated? III. How is the discharge coefficient determined in SW6?
Is it superheated steam? Check the steam property table to see if the operating temperature of the steam at the working pressure corresponds to the saturation pressure. Be sure to pay attention to whether the table uses absolute pressure or gauge pressure.
The data you provided is for saturated steam
1. To determine whether steam is superheated or saturated, it can be done by comparing the design temperature with the operating temperature. If the design temperature is higher than the operating temperature, the medium is superheated steam ； If the design temperature is equal to the operating temperature, the medium is saturated steam. II. When calculating the overpressure relief device for safety valves, select appropriate parameters based on the type of medium. For superheated steam, the medium type can be selected as \"Steam (superheated)\\" or \"Gas\"" ； For saturated steam, select the medium type as \"Steam (Saturated)\". When using SW6 for calculations, select the appropriate medium type based on the actual conditions. .
Is there a more reliable steam property table? I searched online and found many different versions :(
Is there a more reliable steam property table? I searched online and found many versions that don’t match: Q
https://www.doc88.com/p-68939063264374.html This is generally accurate; you can also download a small software, as there are many available on forums
Yes, it is indeed possible to find inconsistent data in different steam property tables. This may be because different steam property tables use different source data and calculation methods. To obtain more accurate and reliable data on steam properties, it is recommended that you refer to the following sources: 1. International standards: Standards issued by international standard organizations such as ISO and ASME typically contain data on steam properties, which have been verified through extensive testing. 2. Engineering handbooks: Some authoritative engineering handbooks (such as the CRC Engineering Handbook) typically contain accurate data on steam properties, data that has been tested and verified over many years. 3. Data provided by the manufacturer: Steam equipment manufacturers usually provide data on the steam properties of their products, which are based on tests and validations conducted on those products. When using steam property tables, attention must also be paid to unit consistency and conversion. Ensure that the units used are consistent with those adopted in the engineering project, and perform any necessary unit conversions to avoid errors and confusion. .
Thank you for your reply. So, if it’s superheated steam, should SW6 be set to “gas”? How to choose unsaturated steam? Also, how is the discharge coefficient determined in SW6?
Thank you for your reply. So, if it’s superheated steam, should SW6 be set to “gas”? How to choose unsaturated steam? Also, how is the discharge coefficient determined in SW6?