Thermal Radiation Energy transfer

[Awer1]

I have a general question regarding Radiation. If the net Thermal Radiation is understood to be :

Pnet = Pabs - Prad= σϵA(Tenv^4 - T^4) . How is it that Pnet is negative if the environmental temp is higher than the temp of the object?

 

[willem2]

I have a general question regarding Radiation. If the net Thermal Radiation is understood to be :

Pnet = Pabs - Prad= σϵA(Tenv^4 - T^4) . How is it that Pnet is negative if the environmental temp is higher than the temp of the object?

Because the incoming radiation has more energy than the outgoing radiation. I can't see what the problem is.

 

[Awer1]

I figured it out with some help, the equation in the book and their website had the equation wrong.. the book had the temperatures flipped