THEME: Heat exchangers Use available resources as per the list here below and answer the following questions on heat exchangers. 1. What is a heat exchanger? 2. Fouling - What is fouling in heat exchangers? - What causes fouling in heat exchangers? - How does fouling affect the heat exchange process? - How is fouling taken into account in the overall heat transfer coefficient? 3. What are the main types of heat exchangers used in the chemical industry? 4. What is the effectiveness of a heat exchanger? 5. What is the number of transfer units in a heat exchanger and how does it relate the heat exchanger effectiveness? Respond by any example of heat exchanger type and any flow arrangement