Afixture will be designed to hold a part in a vise that will be produced in mass quantities. the rner closest to the mill oper a suitable fixture. the sketch should depict an appropriate feature reference frame and ergonomic clamps. if easier for you, use catia to produce the sketch. note: this is an open design question. apply the fixture design concepts in lec 6a qualitatively, but explain the motivation for your different choices.

Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?