Refrigeration – Automatic control – Diverse – cascade or compound refrigeration-producing system
Patent
1986-03-13
1989-08-01
Tanner, Harry B.
Refrigeration
Automatic control
Diverse, cascade or compound refrigeration-producing system
62201, 622285, 62434, F25B 500
Patent
active
048523623
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to modular refrigeration systems and relates particularly to such refrigeration systems for use in air conditioning installations.
Air conditioning installations for modern buildings, such as large office structures, shopping complexes, warehouses and the like, conventionally comprise air treatment units to which water or other heat exchange fluid is pumped whereby air is cooled (in summer) or heated (in winter) and circulated to the areas to be conditioned. The heat exchange fluid for cooling is generally circulated through an evaporator/chiller of a refrigeration system which removes heat from the fluid. The heat is given up to a second heat exchange fluid which circulates passed the condenser of the refrigeration system. The second heat exchange fluid may also comprise water or other liquid or may comprise air in an air cooled or evaporative cooler system. Such systems may also be designed to operate on reverse cycle and act as heat pumps to heat the air to be conditioned. The refrigeration system will, of course, have cooling/ heating capacity appropriate to the capacity of the air conditioning installation.
BACKGROUND OF THE INVENTION
For high capacity installations, as may be incorporated in office and apartment blocks, a refrigeration system of high output is necessary to be able to handle the maximum load expected. In practice, such high output refrigeration systems tend to be more prone to breakdown and failure than do lower output refrigeration units. Such breakdowns and failures often leave the building in which the system is installed without any air conditioning until the breakdown or failure is remedied. In high capacity systems, breakdowns and failures can often take days and, sometimes, weeks to repair.
Further, in the design and construction of many modern building structures, provision is made for the expansion of the building structure, that is, the building is constructed in a number of stages spread over a period of time. Because of the difficulty in expanding a predesigned air conditioning system, it is generally necessary to design and install the system to have the air conditioning capacity for the completed building structure. This means, therefore, that the system is running, inefficiently, at less than full load capacity until such time as all building stages are completed.
In other instances, building structures are extended after the initial design and construction, and such extensions often require the air conditioning system for the initial building structure to be completely replaced with a new system to be able to handle the load of the extended building structure.
BACKGROUND ART
Australian Patent Specification No. 218,986 in the name of Alden Irving McFarlan discloses an air conditioning system for buildings having areas which require heating and cooling, the system incorporating separate air treating units for each of the different areas. The system described incorporates a number of individual refrigeration units comprising separate compressors, evaporators and condensers. These can be automatically and individually controlled for starting, stopping and unloading of the compressors to maintain high efficiency of operation at less than peak loads. However, the condensers for each refrigeration unit are connected in series as are the water circuits of the evaporator/chillers thus requiring each refrigeration unit to have individual design criteria in accordance with the variation in temperature of the water circulating through the individual, series connected condensers and evaporator/ chillers.
It is desirable to provide an improved refrigeration system which obviates the disadvantages of the known systems.
It is also desirable to provide an improved refrigeration system which allows the design and construction of an air conditioning system for a building or like structure, which air conditioning system is less prone to breakdown and failure than known air conditioning systems.
It is also desirable to provide an improve
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Multistack, Inc.
Tanner Harry B.
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