A condenser is required to condense n-propanol vapour leaving the top of a distillation column. The n-propanol is essentially pure,and is a saturated vapour at a pressure of 2.1 bara. The condensate needs to be sub-cooled to 45°C. Design a horizontal shell and tube condenser capable of handling a vapour rate of 30,000 kg/h. Cooling water is available at 30°C and the temperature rise is to be limited to 30°C. The pressure drop on the vapour stream is to be less than 50 kN/m², and on the water stream less than 70 kN/m². The preferred tube size is 16 mm inside diameter, 19 mm outside diameter, and 2.5 m long. Take the saturation temperature of n-propanol at 2.1 bar as 118°C. The other physical properties required can be found in the literature, or estimated.