VaV valve with PWM hot water coil

Heat exchange – Regenerator – Checker brick structure

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Details

165 16, 165 22, 165 26, 165 27, 236 493, 236 46F, 236 1B, 236 1C, 25112905, F24F 11053, F24F 1106, F25B 2900

Patent

active

049287508

ABSTRACT:
A refrigeration system for temperature conditioning several comfort zones includes several VAV (variable air volume) valves each having a hot water coil conveying water whose flow rate is regulated by a PWM (pulse-width modulated) solenoid valve. Each VAV valve is connected to a supply air duct conveying cool supply air. When a zone's temperature is above a set point temperature, the opening of the VAV valve is modulated to meet the cooling demand, and the water coil is shut off. When a zone's temperature is below the set point, the VAV valve is opened to provide a predetermined constant airflow rate and the hot water coil's solenoid valve is cycled open and closed in a pulse-width modulated manner to meet the heating demand.

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