Warm methanol is used as a solvent in a cleaning operation. The methanol is at 25°C and it must be heated to 40°C at a flow rate of 50 000 kg/hr. Water at 80°C and a flow rate of 40 000 kg/h.r is available to heat the methanol. Select a heat exchanger for this service. DO not neglect effects of fouling, and assume that tube lengths of 1, 2, 3, 4, or 5 m are available.