CEMP-E
TI 811-12
18 August 1998
(1)
UMCS inputs from utility system.
(a)
Chiller status (auxiliary contacts) - one per chiller.
(b)
Chilled water supply temperature - one per chiller.
(c)
Chilled water return temperature - one per chiller.
(d)
Chilled water flow - one per chiller (for variable flow systems only)
(e)
Entering condenser water temperature - one per chiller.
(f)
Leaving condenser water temperature - one per chiller.
(g)
Condenser water flow - one per chiller (for variable flow systems only).
(h)
Instantaneous kW to chiller - one per chiller.
(i)
Instantaneous kW to chiller water pump(s) - one per CW pump (if variable).
(j)
Instantaneous kW to condenser water pump(s) - one per condenser water pump (if
variable).
(k)
Instantaneous kW to cooling tower fan(s) - one per cooling tower fan (if variable).
(l)
Common chilled water supply temperature - one per chilled water plant.
(m) Common chilled water return temperature - one per chilled water plant
(n)
Total chilled water flow - one per chilled water plan.
(o)
Chilled water pump status - one per chilled water pump.
(p)
Condenser water pump status - one per condenser water pump.
(q)
Solution pump status (absorption chillers only).
(r)
Steam flow (for absorption chillers only).
(2) UMCS outputs to utility system. Start/stop control signal to interposing relays or start/stop
signal to chiller operator for manual control - one for each chiller, chilled water pump, condenser water
pump, cooling tower fan.
b. Software I/O requirements. The software requirements are:
(1)
Program inputs.
(a)
Efficiency curves.
(b)
Chiller water supply temperatures.
(c)
Chiller water return temperatures.
(d)
Chiller water flows (for variable flow systems only).
(e)
Entering condenser water temperatures.
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