Bar Nunn has investigated an alternate manufacturer to the one identified in Problem 9-3...

Bar Nunn has investigated an alternate manufacturer to the one identified in Problem 9-3. The alternate manufacturer offers a vacuum operated system that uses a maximum TMP of –55 kPa. With the exception of the TMP, the operating conditions are the same as those given in Problem 9-3. The capital cost of membrane is $1,100/m² for both membranes, but the operating costs are less for the vacuum system because of the lower TMP. If the vacuum system operating costs are $16,500 per year and those for the pressure system are $33,000 per year and Bar Nunn uses 6.00% interest and a 10-year membrane life to evaluate alternatives, which system should be chosen based on these costs alone?

Problem 9-3

Estimate the area of membrane required for Bar Nunn’s new membrane filtration plant. The manufacturer of one of the membranes they have selected for testing has provided the following data: