I have a high sleeper in my room (width 3,70m, length 4,50m, height 3,30m) consisting of one large plane (yellow) and one window (darker grey). The plance leaves about 80cm space to sleep. The door (not visible) is under the plane and should be irrelevant because it remains closed over night.
The space between plane and ceiling tends to get hot relatively to the room temperature because warm air rises up. Opening the window (tilt or completely) is not a problem, but the cooling only has a small effect close to the floor of the room - without moving air/wind -, and as good as none under the ceiling for hours (when I wake up at night an go down from the bed and up again I feel a significant temperature difference).
Therefore I'd like to transport cold air from outside inside the room to create a stronger/faster cooling effect. I'm considering a system with multiple small vents. Which direction of airflow would be advantageous? Blowing warm air outside? Sucking cold air in? Laying out airflow in a line (e.g. from window to bed) or in a circle? Directing the airflow close to the ground or the ceiling?
I'm renting the room and can't change the door, window or floor. The door has no joints and leaves some mm gaps at all sites. The ceiling in the build are old wood constructions which at least lets warm air pass very well in winter (I don't have to heat in the early winter because my neighbors below do that).
Construction of supports, ducts or else is not a problem because I have access to carpenter tools and expertise in the neighborhood - nor is the look of the installation/making the installation look nice. I want to figure out the engineering aspects of the setup.