Air powered terminal unit and system
An air powered terminal unit comprising a housing, a fluid to air heat exchanger, an induced flow air inlet upstream of the heat exchanger, a venturi downstream of the heat exchanger, a nozzle cooperatively disposed with the venturi so as to direct a primary air jet discharged from the nozzle through the venturi, such that an air flow through the heat exchanger is induced, and an outlet downstream of the venturi for discharging a mixture of the induced flow air and the primary air.
1 . An air powered terminal unit comprising:
a housing;
a fluid to air heat exchanger;
an induced flow air inlet upstream of the heat exchanger;
a venturi downstream of the heat exchanger;
a nozzle cooperatively disposed with the venturi so as to direct a primary air jet discharged from the nozzle through the venturi, such that an air flow through the heat exchanger is induced; and
an outlet downstream of the venturi for discharging a mixture of the induced flow air and the primary air.
2 . The air powered terminal unit as in claim 1 further comprising:
a water separator cooperatively disposed with the air heat exchanger; and
a drain pan cooperatively disposed with the water separator.
3 . An air powered terminal unit system comprising:
an air powered terminal unit comprising:
a housing;
a fluid to air heat exchanger;
a water separator cooperatively disposed with the air heat exchanger;
a drain pan cooperatively disposed with the water separator;
an air inlet upstream of the heat exchanger;
a venturi downstream of the heat exchanger;
a nozzle cooperatively disposed with the venturi so as to direct an air jet through the venturi;
an air outlet downstream of the venturi;
a heat recovery exchanger upstream of the air powered terminal unit;
a fluid to air heat exchanger downstream of the heat recovery exchanger and upstream of the air powered terminal unit;
a fan upstream of the air powered terminal unit discharging air into the air powered terminal unit through the nozzle, the air having a primary air pressure;
the air outlet discharging air into a room; and
the air inlet receiving air from the room.
4 . The air powered terminal unit as in claim 1 , wherein the nozzle is disposed between the heat exchanger and the venturi.
5 . The air powered terminal unit as in claim 1 further comprising a control valve connected to a heat exchanger fluid supply.
6 . The air powered terminal unit as in claim 1 further comprising a mixing chamber upstream of the venturi.
7 . The air powered terminal unit in claim 6 , wherein the mixing chamber is downstream of the heat exchanger.
8 . The air powered terminal unit in claim 3 , wherein the primary air static pressure is regained downstream of the venturi.