Auxiliary conditions (6, 6)

1. (1): P2 = 0.5 * (T2_P1 + T2_P2)
2. (1): P1 = 0.5 * (T1_P1 + T1_P2)
3. (1): V_h = cp * T + b * P
4. (1): T2_h = cp * T2 + b * P2
5. (1): T1_h = cp * T1 + b * P1
6. (1): T1_Q2 = Q1