I'm unemployed, but sometimes it seems that 10-12 hours is more than enough for me, then I get sleepy, but not always though.
in junior high I needed naps in the afternoon. I stopped needing them when I was a year old, but school was demanding and I needed it again then.
in high school I could have needed it but I got home too late in the day for that to be an option. If what you do is demanding for you or require a lot of social interaction, it makes sense that aspies would get tired as a result.
Although I did have a classmate who most certainly wasn't aspie nor introvert, and she claimed she often napped in the afternoon too.