Self-balancing variable air volume heating and cooling system
First Claim
1. In a VAV terminal unit coupled to a primary air supply and having a damper to control terminal unit airflow, the terminal unit also having a predetermiend unit maximum airflow, a method of operation comprising the steps of:
- monitoring a local zone temperature; and
if the local zone temperature is outside predetermined zone requirements and the damper is not fully open, incrementally increasign the unit maximum airflow level.
2 Assignments
0 Petitions
Accused Products
Abstract
A variable air volume heating and cooling system that provides automatic system-wide airflow balancing is disclosed. To balance the system, each terminal box maximum airflow setting is automatically and continuously adjusted in response to central supply fan loading conditions together with local zone conditions. The new system has the advantage of automating both initial air balancing of terminal units at the time of installation, as well as rebalancing to respond to changing conditions, without technician intervention. Substantial savings in energy cost can be achieved since the operating curve of each terminal unit is automatically adjusted to demand no more conditioned air volume than necessary.
100 Citations
8 Claims
-
1. In a VAV terminal unit coupled to a primary air supply and having a damper to control terminal unit airflow, the terminal unit also having a predetermiend unit maximum airflow, a method of operation comprising the steps of:
-
monitoring a local zone temperature; and if the local zone temperature is outside predetermined zone requirements and the damper is not fully open, incrementally increasign the unit maximum airflow level. - View Dependent Claims (2, 3, 4, 5)
-
-
6. In a VAV terminal unit coupled to a primary air supply and having a damper to control terminal unit airflow, the terminal unit also having a predetermined terminal unit maximum airflow, a method of operation comprising the steps of:
-
monitoring a local zone temperature; monitoring a local terminal unit airflow setpoint; determining whether the local zone temperature has remained continuously within predetermined zone requirements for at least a predetermined time interval; determining whether the terminal unit airflow setpoint has continuously remained below the current unit maximum airflow for at least the predetermined time interval, incrementally decreasing the terminal unit maximum airflow, thereby adjusting the operation of the terminal unit so as to reduce load on the primary air supply. - View Dependent Claims (7, 8)
-
Specification