about energy equation
 

I use the newest edition of Phoenics 3.3 to simulate the temperature and velocity fields of steel¡¯s Solidification process. The energy equation is enthalpy equation. The variable I solved is H1, then I name (H1)=TMP1. I want to know whether the result is temperature or enthalpy. If the variable I solved is TEMP, the result of course is temperature. But what is the difference between the two methods? I use the two methods to solve the temperature field but the result is not same. I do appreciate you if you can explain these.