Question

A building has a design heating load of 63,000 BTU/hr. A series loop hydronic heating system will be used. A 2-in type M copper tubing will be selected for baseboard. Supply temperature (temperature of water leaving the boler) is 220° F and an overall system temperature drop of 300 F is permitted. Determine: a. Water temperature at exit of Unit #1(OF), b. Water temperature at the entrance of unit # 5 (OF) c. Flow rate in Unit # 5 (GPM), d. Return temperature (temperature at the entrance of the boiler) (F), Length of baseboard for Unit # 7 (ft). (Your answer should be an integer number. Do not use decimal. (Question parts a through d are 3 pts each and part e is 5 pts.) e. Note: Please do not convert the units to metric system. Your answer for each part of the question must be given only in the unit as indicated in each part. This question requires a file attachment, which MUST BE in PDF format.A PDF verison of your handwritten wot is acceptable. Any other file type will not be evaluated. You are required to show all steps you used in your calculations. Click on the hydronic system below to view a larger image 10,000 8,000 12,000 BTU/hr BTU/hr BTU/hr Pump Unit # 2 Unit # 1 Unit # 3 Unit # 4 Boiler Unit#7 Unit# 6 Unit # 5 9.000 7,000 5,000 BTU/hr BTU/hr BTU/hr Attach File

Answer 1

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