Q1 A company reviewed its energy demands and the method used to meet such demands. The...

Transcribed Image Text:

Q1 A company reviewed its energy demands and the method used to meet such demands. The review showed that heating demand of 1740 kW and cooling demand of 1280 kW are required to bring the streams shown in the following table to their required temperatures. Table Q1 Streams temperatures and thermal capacity. Stream 1 -234 Thermal Capacity Initial (kW/K) Final temperature temperature (C) (C) 2 200 30 4 400 50 30 300 30 500 3 1 Using the Pinch methodology and minimum temperature difference of 20 K, determine the minimum external heating and cooling demands and the Pinch temperature. [120kW, 580kW, 400 C, 380 C] An Engineer proposed the following heat recovery system, determine the heat transfer capacity of the external heater (H), the external coolers (C1 and C2) and the three heat exchangers HE1, HE2 and HE3 ensuring the design follows the Pinch rules. [120kW, 190kW, 390kW, 150kW, 200kW, 810kW] Above the pinch (i) (ii) 12 24 33 41 500 400 400 Below the pinch 200 30 C1 HE1 50 30 300 HE3 380 HE2 H 380 0 30 Q1 A company reviewed its energy demands and the method used to meet such demands. The review showed that heating demand of 1740 kW and cooling demand of 1280 kW are required to bring the streams shown in the following table to their required temperatures. Table Q1 Streams temperatures and thermal capacity. Stream 1 -234 Thermal Capacity Initial (kW/K) Final temperature temperature (C) (C) 2 200 30 4 400 50 30 300 30 500 3 1 Using the Pinch methodology and minimum temperature difference of 20 K, determine the minimum external heating and cooling demands and the Pinch temperature. [120kW, 580kW, 400 C, 380 C] An Engineer proposed the following heat recovery system, determine the heat transfer capacity of the external heater (H), the external coolers (C1 and C2) and the three heat exchangers HE1, HE2 and HE3 ensuring the design follows the Pinch rules. [120kW, 190kW, 390kW, 150kW, 200kW, 810kW] Above the pinch (i) (ii) 12 24 33 41 500 400 400 Below the pinch 200 30 C1 HE1 50 30 300 HE3 380 HE2 H 380 0 30