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US 3,945,432 AGranted
Air conditioning method and system
OwnerRobert Teudar Tamblyninventor
Life of this patent
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OwnerRobert Teudar Tamblyninventor
Estimating the term…
A method and system of air conditioning multi-storey buildings having a plurality of floors to be conditioned wherein at least one compartment air handling unit on each floor is contained within a fan closet. Fresh air conditioning means is located remote from the closets and feeds the closets with fresh air preconditioned as to temperature and humidity. The fresh air mixes with return air from the floor in the closet and the mixture is conditioned in said compartment unit and supplied to various spaces on the floor for balancing the cooling load in the space. The air mixture is supplied at a base temperature and variable air volume terminals control the amount of cool air entering the space. The base temperature of the air mixture is controlled by a thermostat in the chilled water return line controlling the capacity of mechanical cooling means, the capacity of a cooling tower when it is used as a free cooler and chilled water heating means, depending on outdoor temperatures, in order to maintain a predetermined temperature differential between the air mixture and chilled liquid in the return line. The compartment air handling units are self-contained and presilenced with one sided maintainance. Perimeter radiation units are supplied with heated liquid scheduled to a temperature where building fabric heat loss is neutralized. During a heat reclaim cycle wherein internal building heat is transferred to the radiation liquid through a condensing liquid circuit having a cooling tower, the evaporative cooling capacity of the cooling tower is varied inversely to the outdoor temperature to increase the heat transferred. The perimeter radiation units are thinfinned and include support mullions capable of containing sound absorbing means. Front panels hanging from the mullions provide easy access to the inside of said radiation units.
In a system for air conditioning a multi-storey building having an air handling unit in a compartment on a floor to be conditioned, variable air volume distribution means for distributing conditioned air from said unit to spaces on said floor and means for permitting air to return to said compartment from said spaces, each of said units including cooling coils in heat-exchange relation with air passing therethrough, fresh air conditioning means including a chilled water piping circuit with a precoil and a recoil remote from said floors and providing conditioned fresh air to each said compartment for mixing with return air from said spaces, the chilled water piping circuit including each of said unit cooling coils feeding a common return line and including cooling means remote from said floors and said precoil and recoil, and thermostatic control means responsive to the temperature of chilled water in said common return line for controlling the cooling capacity of said cooling means, thereby maintaining a predetermined difference between the temperature of the chilled water in said common return line and the temperature of air off said unit cooling coils.
In a system for air conditioning a multi-storey building having an air handling unit in a compartment on a floor to be conditioned, variable air volume distribution means for distributing conditioned air to spaces on said floor and means for permitting air to return to said compartment from said spaces, each of said units including cooling coils in heat-exchange relation with air passing therethrough for conditioning return air, fresh air conditioning means including a chilled water piping circuit with a precoil and a recoil remote from said floors for conditioning fresh air, and means for conveying conditioned air to said distribution means, the chilled water piping circuit including each of said unit cooling coils feeding a common return line and including cooling means remote from said floors and said precoil and recoil, and the thermostatic control means responsive to the temperature of chilled liquid in said common return line for controlling the cooling capacity of said cooling means, thereby maintaining a predetermined difference between the temperature of the chilled water in said common return line and the temperature of air off said unit cooling coils.
In a system for air conditioning a multi-storey building having an air handling unit in a compartment on a floor to be conditioned, variable air volume distribution means for distributing conditioned air from said unit to rooms on said floor and means for permitting air to return to said compartment from said rooms, each of said units including cooling coils in heat-exchange relation with air passing therethrough, fresh air conditioning means including a precoil and a recoil remote from said floors and providing conditioned fresh air to each said compartment for mixing with return air from said rooms, mechanical cooling means remote from said floors and including a vaned chiller and a condenser, a condensing water circuit including said condenser and a cooling tower, a chilled water piping circuit including each of said unit cooling coils feeding a common return line and including said chiller and said precoil and recoil, said chiller being between said precoil and recoil, means for selectively including a convertor into said chilled water circuit and the condensing water circuit, and thermostatic control means responsive to the temperature of chilled water in said common return line for controlling the cooling capacity of said vaned chiller during mechanical cooling, thereby maintaining a predetermined difference between the temperature of the chilled water in said common return line and the temperature of air off said unit cooling coils and whereby when outdoor temperature drops to a predetermined temperature, said convertor being included into said circuits when said system is switched from mechanical cooling to free cooling through said cooling tower, said thermostatic control means during free cooling controlling the evaporative cooling capacity of said cooling tower as a free cooler in order to maintain said predetermined temperature difference.
Dependencies are inferred from the claim text.