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ACRC300 Series, ACRC600 Series Technical Data
Determining Cooling Capacity
IT equipment requires two acceptable limits in order for effective cooling to occur.
These parameters are inlet air temperature and flow rate of air through the IT
equipment. It is entirely possible, though undesirable, to design a computer room
with enough heat removal capacity, but with an inadequate volumetric flow rate of
cool air supply. When this condition exists, IT equipment will be subjected to
excessively high operating temperatures on a localized basis due to recirculation,
and cooling equipment will operate at less than optimal efficiency. Schneider
Electric provides the necessary data to prevent this undesirable situation. The first
table, titled “Recommended Capacity Limitations,” shows the capacity limits based
on air flow of the InRow RC. The following tables, titled “Performance
Specifications”, show the recommended maximum amount of load that should be
placed upon the cooling unit solely based on heat removal capability. The lesser of
the two capacity numbers obtained from the “Recommended Capacity Limitations”
table and “Performance Specification” table should be considered the maximum
load capable of being served by the InRow RC. A definition of the terms in these
tables follows:
IT equipment air flow (kW/CFM and kW/l/s)— The average cooling air flow rate
demanded by IT equipment in liters per second (cubic feet per minute) divided by
the total actual power dissipation of IT equipment in kilowatts.
Recommended capacity limit (kW)— The corresponding maximum load in
kilowatts capable of being served by the cooling unit solely based on conservation
of volumetric air flow.
DB (°C and °F)— The dry bulb temperature in degrees Fahrenheit and Celsius of
the return air stream to the cooling unit.
WB (°C and °F)— The wet bulb temperature in degrees Fahrenheit and Celsius of
the return air stream to the cooling unit.
CW delta T (°C and °F)— The difference in temperature in degrees Fahrenheit
and Celsius between chilled water entering and exiting the cooling unit.
Sensible net capacity (kW and BTU/hr)— The sensible net heat removal
capacity of fan heat, of the cooling unit at stated operating conditions.
Total net capacity (kW and BTU/hr)— The total (sensible + latent) net heat
removal capacity of fan heat, of the cooling unit at stated operating conditions.
Sensible heat ratio (SHR)— The sensible heat ratio of the unit at stated
conditions. Sensible Heat Ratio is the ratio of sensible capacity to total capacity.
CW flow rate (l/s and GPM)— The volumetric flow rate of chilled water through
the cooling unit in gallons per minute, and liters per second, that is required to
result in the stated performance. For base loads, ACRC301S units should not
have a flow rate greater than 1.3 l/s (20.8 GPM), ACRC301H units should not
have a flow rate greater than 1.95 l/s (30.9 GPM), and ACRC600 series units
should not have a flow rate greater than 2.08 l/s (33 GPM); peak loads may
exceed these flow rates by up to 25 percent for short time spans.
Total CW pressure drop (kPa and ft H
2
O) — The differential pressure observed
between inlet and outlet chilled water connections for the stated CW flow rate.
40 990-5792B-001
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Productinformatie
| Merk | Apc |
| Model | ACRC600 |
| Categorie | Airco |
| Taal | Nederlands |
| Grootte | 10113 MB |
Caratteristiche Prodotto
| Gewicht | 345.45 g |
| Soort | Vrijstaande rek |
| Maximale gewichtscapaciteit | - kg |
| Rackcapaciteit | 42U |