STEPS TO COMPRESSOR SELECTION SIZING（步骤压缩机选择大小）.pdfVIP

04/99 CB-207 COMPRESSORS STEPS TO COMPRESSOR SELECTION SIZING I Understand the Application What is the compressor supposed to do? II Find Out the Details Gas, pressures, temperatures, capacities, etc.? III Scope of Supply Who is to supply the motor, switchgear, piping, etc.? IV Size the Compressor V Select Accessories When all of the above has been done, this information can be combined with what is known about the customers needs/desires to generate a successful quotation. page 2 COMPRESSOR SIZING 04/99 CB-207 STEP I - Understand the Application Become familiar with the big picture before getting into the details of the application. 1. Form a clear, concise statement describing the purpose of the compressor. 2. Many compressors operate at more than one condition. Determine why and how often the various conditions occur. Examples: This compressor is to transfer liquid propane from railcars into a bulk storage tank. After the liquid has been transferred, the remaining vapors will be recovered. The compressor will operate year around, emptying about 2 railcars per week. This compressor will be used to evacuate a vessel at the end of a batch process. It will be used in a production facility that will perform 6 batch operations in a 16 hour day. NOTE THAT DETAILS LIKE PRESSURES, TEMPERATURES FLOW RATES ARE NOT NEEDED OR EVEN WANTED AT THIS STEP. page 3 COMPRESSOR SIZING 04/99 CB-207 STEP II - Find Out the Details In order to determine what type of compressor system will be needed to accomplish the job, a variety of detailed data will need to be discerned. As a minimum, a precise understanding of the following data is required: Gas being handled Suction and