Consider the shown two-pipe reverse return steel hot water heating system. If the longest equivalent length is 80m, the domestic hot water load is 12KW; the hot water temperature drop across the radiators is 10C, calorific value of diesel fuel is 39000 KJ/KG, combustion efficiency is 88%, the flue gas density and its average velocity is 1.1 Kg/m and 4 m/s, respectively. Calculate the following 1) Boiler heating capacity (2 point) 2) The iron and Bronze pump capacity (2point) 3) Diameter of supply C-D, F-G and the return N-O, L-M (4point) 4) Chimney diameter of this boiler. (3point) 5) What is the name of this pipe system (2point) 1.7 kW 1.7 kW 10 M 2.2 kW F Pump Boiler Domestic Hot Water JA 1.7 kW B 1.4 kW E K! C 2.2 kW 1.7 kW