How does HTRI perform calculations?

It shows that you haven’t gotten started yet. You just need to fill in the items in the red boxes. HTRI has four modes. The detailed explanation is as follows: 1. Rating: For exchangers with geometrically defined specifications, determining their performance requires sufficient process information, including the number of tube passes, number of rows, bundle width, tube length, pitch, layout angle, tube diameter, and tube wall thickness. 2. Simulation: The difference between rating and simulation lies solely in the amount of process information required; a simulation (for cases where the performance requirements are not known) needs less process information. In a simulation, Xace calculates the expected performance of the exchanger, with the final result being the maximum heat load that can be handled by the unit. 3. Classic Design: Xace designs the smallest exchanger that utilizes the minimum number of parallel tubes, while still meeting the given geometric, process, and physical property constraints. Process constraints must include the heat load (either explicitly specified or inferred), and may also include restrictions on pressure drop and/or flow velocity. The minimum geometric parameters required for designing such an exchanger are tube length, pitch, layout type, tube diameter, and tube wall thickness. 4. Grid Design: This approach provides more control over the design process, as you can specify a range of critical parameters that Xace should consider during the design process. For example, you can define a minimum and maximum number of rows to be evaluated. Once the design is complete, Xace selects the smallest exchanger that satisfies all the process constraint requirements.