- #1

SF2K4

- 7

- 0

## Homework Statement

The pressure and temperature at the beginning of compression in an air-standard Diesel cycle are 95 kPa and 300K. At the end of the head addition process, the pressure is 7.2 MPa and 2150 K. Assume variable specific heats.

I'm not going to list the parts because all of the questions rely on knowing the V and T of State 2, which I cannot find.

2. Homework Equations

2. Homework Equations

I know that P_2 = P_3 = 7.2 MPa. I also know that s_2 = s_1 = 1.70203 kJ/kg*K

3. The Attempt at a Solution

3. The Attempt at a Solution

I have no idea. In order to do anything, find cycle ratios or thermal effiencies relating to the compression or head addition stage, I NEED to either know the Temperature of State 2 or the Volume or Volume Ratio of State 2, which I need the Temperature of to find it on the table, or both. Basically without the Temperature of State 2 I cannot finish this problem and I don't know what I'm missing.