With these constraints, what parameters could be changed?įirst was pipe size. Due to the layout and constraints, maximum pipe size was a 200-mm, schedule-40, nominal pipe size.The seawater system was finalized so no changes could be made to the pumps or piping on that side, only to the heat exchanger through which it interacts.Limit of 80 ☌ on temperature, anywhere in the system.System constraints include the following: The entire loop interacts with a cooling loop that pumps seawater through a heat exchanger. A feed water pump also is part of this cooling loop. The model is composed of several heat sources: a diesel generator, ancillary equipment, scavenger oil cooler, lubrication oil cooler and engine jacket. All data and final routing may not be available, but it’s possible to estimate based on initial layouts (see Figure 1). Initial pump sizing usually comes early in the design process.
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