HVAC and district cooling
Chilled water pumps for district cooling plants and hotels
Pumps run every hour the chillers run, so they decide a large share of a cooling plant's energy bill. Gabtic selects chilled water pumps for how the plant actually operates, mostly at part load, not only for the peak design day.
For HVAC and MEP contractors on district cooling plants, hotels, resorts, hospitals and large commercial buildings.
What chilled water pumping has to do
A cooling plant spends most of its life well below design load. The pumping has to follow that load without wasting energy or starving the far end of the network.
- Move the design flow at the design temperature difference on the peak day
- Turn down efficiently at part load, by varying speed and staging pumps
- Hold enough pressure at the most remote coil or building connection
- Keep running when one pump is out for service, with standby capacity (for example N+1)
What to specify
The choices that make the biggest difference to running cost and reliability.
- Pumping arrangement: primary-only variable flow, or primary-secondary
- Split-case pumps for large district cooling flows; vertical in-line pumps where plant room space is tight, as in hotels
- Variable-speed drives with sequencing control that stages pumps for the lowest total energy
- Efficiency at the expected operating points, not only at the best efficiency point
- Air and dirt separation and correctly sized expansion tanks to protect pumps, chillers and coils
- Connection to the BMS for monitoring and alarms
How Gabtic supplies it
We supply the pumps and the equipment around them as one coordinated package.
- Selection from your flow, head and load profile, with operating points marked on the curves
- Armstrong pumps, sequencing controls, air separators and expansion tanks from one supplier
- Submittals with data sheets, curves, drawings and a compliance statement
- Testing and commissioning on site, including control set-up
- Spare parts and service in Egypt for the life of the plant
What to send us for a selection
With these, an engineer can return a selection and a quote.
- Plant capacity in tons of refrigeration (TR) and chilled water supply and return temperatures
- Flow and head per pump, or the pipe network data
- Pumping arrangement and number of duty and standby pumps
- Plant room space limits
- Specification clauses or consultant name
- Required delivery date
Equipment we supply for this
Where Gabtic has supplied this
Projects with the MEP contractor and consultant named on each page.
Common questions
Split-case or vertical in-line pumps for chilled water?
Split-case pumps suit the large flows of district cooling plants and allow maintenance without disturbing pipework. Vertical in-line pumps save plant room space and suit hotels and buildings. Gabtic recommends based on flow, space and the specification.
How can chilled water pumping use less energy?
Use variable speed, stage pumps to match demand, and select pumps that are efficient at part load where the plant runs most of the time. Removing air and dirt also keeps pumps and coils working as designed.
Has Gabtic supplied district cooling plants in Egypt?
Yes. Gabtic supplied Armstrong Design Envelope HVAC pumps for the 60,000 TR Ministries District Cooling Plant in the New Administrative Capital. The project page names the MEP contractor and consultant.
Send us the duty and we will select it
Our engineers reply with a selection, performance curves and a quote. If your consultant needs documents first, ask for a submittal pack.