Albert Einstein designed a 3.8 kW cooling capacity refrigerator (as shown in Figure Q2) operates at 0.4 MPa using butane, ammonia, and water. The temperature at generator, condenser and evaporator are 100C, 35C, and 5C, respectively. Given the mass flow rate, m1, m3, and m5 are 4.3 g/s, 3 g/s, and 2.8 g/s, respectively, and void fraction at the bubble pump is 0.8. Assuming no heat loss from bubble pump and tank, and only water is pumped to the tank from generator. Refer to the given properties diagram and data sheets. a) Specify the role of the three working fluids (15 marks) And calculate: b) Mass flow rate from tank, m6 and m7 (15 marks) c) Heat input to the generator (20 marks) d) Heat input to the bubble pump (20 marks) e) Heat rejection from the condenser (25 marks) f) COP of the system (5 marks) () Tank 6 ZhEvaporator Bubble pump Condenser (5) Generator