Integrated energy delivery and removal respectively by compression and expansion for the unreduced opacity environment (κ = 1 cm²/g). Red curves show the case where solids are accreted (run RADL27k1). Inside the Hill sphere, we see that the inner envelope mostly acts as a sink of energy that helps gas parcels to expand as they move through the envelope. Green curves represent the energy deposition from compressional heating after solid accretion (run RADL0k1). Compressional heating now provides the luminosity that supports the envelope. The y-axis has been cut to represent the negative values on the log axis.