21st Century High Efficiency Air Conditioning Systems with Flexible Zoning
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21st Century High Efficiency Air Conditioning Systems with Flexible Zoning |
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CHILLERS
The Arcticool Cooling System is an air-cooled chiller system designed to satisfy the requirements of the global residential and commercial markets including, but not limited to, new construction, retrofit, add-on, process, hydronic and Do-It-Yourself (DIY) market segments. Arcticool chillers are available in 3, 4, and 5-ton cooling capacities and are matched with a variety of indoor fan coils, unsurpassed in application flexibility. The Arcticool chiller is a self-contained unit with no add-on modules or additional assembly needed to make chilled water. Arcticool chillers are designed with great care to provide easy service access and readily available components. The Arcticool chiller works using the basic refrigeration cycle. R-22 refrigerant is circulated through the system by a Copeland Scroll compressor which increases the pressure and temperature of the refrigerant and pumps it into the condenser coil. In the condenser, the refrigerant vapor is cooled as air passes over the coil using two, fractional horsepower, fan/motor assemblies configured for horizontal discharge. The refrigerant then condenses into liquid. The liquid refrigerant flows through a thermostatic expansion valve where the flow is metered. The pressure and temperature are reduced. After passing through the expansion valve, the refrigerant flows into a brazed plate heat exchanger where it boils by absorbing heat from the water passing through parallel circuits of the heat exchanger. As the refrigerant starts the trip back through its self-contained cycle, the newly chilled water passes through a stainless steel head, fractional horsepower pump. The water’s head pressure is boosted such that it travels at a specific flow rate (GPM) into the home or other conditioned spaces that are to be cooled. As this chilled water flows through any one of a myriad of fan coil combinations, it passes through a copper coil. Air is moved across the coil and the chilled water absorbs the heat of the space. Cold, dehumidified air is then supplied to the conditioned space. Arcticool Efficiency Let's start with some common definitions used in rating cooling system efficiency. Energy Efficiency Ratio (EER) — The measure of the instantaneous energy efficiency of room air conditioners; the cooling capacity in Btu/hr divided by the watts of power consumed at a specific outdoor temperature (usually 95 degrees Fahrenheit). Seasonal Energy Efficiency Ratio (SEER) — A measure of seasonal or annual efficiency of a central air conditioner or air conditioning heat pump. It takes into account the variations in temperature that can occur within a season and is the average number of Btu of cooling delivered for every watt-hour of electricity used by the heat pump over a cooling season. Equipment sizing for a chilled liquid solution system can utilize Cooling Load Diversity. Diversity is described as the actual amount of cooling needed (heat load), by various sections of a structure at a given time. Conventional air conditioning systems are designed for the highest structure heat load. The conventional system determines and selects equipment based on the peak heat load demanded by the structure. A system sized to take advantage of diversity would determine the heat load by the time of day, building exposure, and usage. As an example the sections of a structure facing west, demand more cooling in the afternoon, than sections facing east. The opposite of this is true in the morning, where the east section is exposed to a higher heat load requiring more cooling. Utilizing diversity the chiller system would adapt to the needs of each side of the structure during peak demand by delivering more cooling to that area and less to the areas that do not need it. A structure utilizing a conventional system, requiring 8 tons of cooling at peak load, could utilize a much smaller capacity system (potentially 4 or 5 tons) if the system installed could take advantage of load diversity, which would supply the necessary amount of cooling to the spaces, as and when needed instead of keeping a larger capacity available at all times.
One of the unique benefits of the Arcticool air conditioning system is the fan coil selection. Arcticool chillers can be matched with any one or a multiple of chilled water fan coils as presented on this site.
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