MECHENG 235 Study Guide - Final Guide: Thermodynamics, Isentropic Process, Rankine Cycle

184 views5 pages

Document Summary

One page of handwritten notes and calculator allowed. When you are done, staple your work pages to these sheets, with this cover page on top. Section # (check one): ___ 001 (pipe) ___ 003 (borgnakke) I have observed the honor code and neither given nor received aid on this exam. A rigid tank contains 1. 5 kg of r-410a at 0 c with quality x = 0. 25. A valve on top of the tank is opened, and saturated vapor r-410a leaving the tank is throttled by the valve and exits to a line with pressure 200 kpa. The process stops when 20% of the mass has flowed out. During the process, the temperature inside the tank remains constant by heat transfer from the 20 c ambient. Hint: consider two steps in the process: 1) the flow from the tank to the inlet of the valve, and 2) the flow through the valve. sat vap e.