plant design

Q 2 Horizontal condensers with condensation in shell and vertical condensers with condensation in tubes are the most commonly applied in industries. A sweet gas to sour gas condenser is to be designed. Inlet temperature of the sweet gas is 100 F and it is to be cooled to 30 F by the other gas which is heated from - 20 F to 90 F. U horiz= 100 and Uverticar=200 BTU/hrftF. The heat duty is equal to 30 MM BTUhr and the condenser may be operated 1-1 or 1-2 condenser. If the condenser is equal 30 ft length and 0.75 inch outside diameter with 14 BWG 15/16 triangular pitch. State how you will install the condenser vertically or horizentally? How many condensers should be used and What is the shell diameter