The cooling tower leaving water temperature and the condenser water flow
rate are the main inputs that are directly related to the optimization the condenser side.
These performance numbers were generated using the Standard 90.1-2016 specification for condenser water flow
, 3 gpm/ton (0.05 L/s x kW) with an entering condenser water temperature of 85[degrees]F (29.4[degrees]C), to illustrate the impact of changing the chilled water temperature.
The performance effects of condenser water flow
rate and tower fan speed are not independent.
In the current version of the testbed, the condenser water flow
rate is held constant.
(Milwaukee) will be installing Q300 actuators to automate the hand valves that control chiner and condenser water flow
at West Jefferson Medical Center in Marrero, La.
The expected annual energy cost savings using baseline operating practices of maintaining the HHW supply temperature at 155[degrees]F (68.3[degrees]C) and condenser water flow
at design of 2039 gpm (128.7 L/s) is $342,060, as shown in Table 2.
But head pressure control and a reduction in condenser water flow
through an operating chiller made our customer very nervous, uncomfortable, and more than a little skeptical.
The evaporator supply chilled water, CHS, temperature can be the 44 [degrees]F (6.7 [degrees]C), 2 gpm/ton (2.15 lpm/kWt), and the condenser water flow
can be 3 gpm/ton (3.23 lpm/kWt).
As shown in Figure 1, six common chiller faults (reduced condenser water flow
rate, reduced evaporator water flow rate, low refrigerant charge, refrigerant overcharge, condenser fouling, noncondensable gas) were divided into two categories: component-level faults and system-level faults.
When the condenser water pipe diameter increases, the condenser water flow
rate and then the pump energy use both drop, but the condenser water piping system cost increases at a lower rate as compared to the chilled-water piping system.
* At the lower condenser water flow
rate, the leaving condenser water temperature rises;
Only seven faults with four levels of severity were considered in this study, namely, reduced condenser water flow
(by reducing water flow), condenser fouling (by plugging tubes in the condenser), refrigerant leakage (by charging less refrigerant), refrigerant overcharge (by charging more refrigerant), reduced evaporator water flow (by reducing water flow), noncondensables in refrigerant (by adding nitrogen into the refrigerant), and excess oil (by charging more oil).