Hi Tom,
I typically use my greenhouse for starts and then use it for chickens in the winter. There are a number of ways to accomplish what you are describing, but most of them will require quite a bit of time and work to build insulations walls, heat storage, heat producing devices, etc.
Probably the simplest concept I think would come from Eliot Coleman who lives here in Maine and wrote a book called 4 season harvest. You will notice he did not call it 4 season growing. But by changing up a little of what we grow and using a greenhouse and row cover, he is cable to harvest vegetables all year round. Changing some of what vegetables you grow is part of it too. You are not going to be growing a tomato, even in a greenhouse, in Maine during the winter without a source of heat.
**Edit
It is like the story of growing a lemon tree in the alps. Can you do it? Yes... is your time better spent on growing something that will grow more easily? Perhaps. I think you can absolutely do what you are talking about, but I worry trying to grow "normal" vegetables in a "normal" greenhouse may require more effort than you want to invest for the output you get.
