- Question 2 Part A 8 Marks Sketched In Figure 2 1 Is Part Of The Lubrication System Of An Engine At Point 1 The Lubri 1 (52.3 KiB) Viewed 49 times
Question 2 Part A: 8 marks Sketched in figure 2-1. is part of the lubrication system of an engine. At point 1, the lubricant enters at atmospheric pressure. At point 2, the gauge pressure is 90kN/mº. The diameter of the suction pipe is twice that of the delivery pipe (i.e. D = 2d). The total head loss is 0.4m of oil at point 2. Point 1 is 0.72m above point 2. The supply head is 12.5m of oil and the oil has a density of 850 kg/m Determine the velocity of the flow in the suction pipe. Pt. 2 d 0.72m Pt. 1 Figure 2.2.1 Part B. 1. mack A single stage reciprocating air compressor has a compression ratio of 5.5. clearance volume of 8% and a cylinder length of 80mm with a diameter of 25mm. Assuming an inlet air pressure of 101 kim at 40°C, a volumetric efficiency of 83% and a compression index of 1.3. Determine: D) The swept volume V. of the compressor if the rom is 600 ii) The clearance Ve, inlet V: & induced volume Vind in MPls ii) The power required, given a mechanical efficiency of 81% iv) The temperature of the air after compression v) Discuss ways to improve the efficiency of a compressor 14) You may use the following information: DPLN V= V. = V1-V3 & Vind = V1-V 40 V=6() -TP WEGAV. (1) PV Part C: 6 marks The Brayton cycle consists of 4 reversible processes. List these stages and sketch out the cycle. Mention its possible uses in industry. Total marks [30]