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**Physics, Astronomy & Cosmology / How do you find specific enthalpy in a boiler system??**

« **on:**04/07/2020 06:07:14 »

How do you find specific enthalpy in a boiler system?

Example question:

An ideal gas enters a horizontal heating pipe at a temperature of 200℃, and with a specific enthalpy of 400 kJ/kg.

As it travels along the pipe heat is added at constant pressure, and the air leaves the heater at a temperature of 300℃.

No work is done on the gas during the heating process. The gas velocity at inlet to the heater is 25 m/s, and at the outlet it is 30 m/s.

(a) Determine the specific enthalpy of the gas as it leaves the heater pipe, if the gas has a specific heat at constant pressure cp= 0.844 kJ/kg

(b) Determine, using the steady flow energy equation, the heat added per kg of gas as it flows through the heater pipe. Give your answer in kJ/kg

Can you help?

Example question:

An ideal gas enters a horizontal heating pipe at a temperature of 200℃, and with a specific enthalpy of 400 kJ/kg.

As it travels along the pipe heat is added at constant pressure, and the air leaves the heater at a temperature of 300℃.

No work is done on the gas during the heating process. The gas velocity at inlet to the heater is 25 m/s, and at the outlet it is 30 m/s.

(a) Determine the specific enthalpy of the gas as it leaves the heater pipe, if the gas has a specific heat at constant pressure cp= 0.844 kJ/kg

(b) Determine, using the steady flow energy equation, the heat added per kg of gas as it flows through the heater pipe. Give your answer in kJ/kg

Can you help?