You will be creating your own building or use the real building data that you know of or have access to. Building description should include square footage, occupancy, schedule and type of HVAC systems including heating, cooling and ventilation. Also, utility bills (gas & electric) for one year (monthly usage).
Choose one or more energy efficient measure that you want to implement in your building.
For instance, lighting retrofit, heating system upgrade, AHU VAV retrofit etc.
Describe new technology; benefits, disadvantages if any etc.
Calculate energy savings, implementation costs and simple payback. You should be able to find some tips and calculations from the text book.