What is Primary and Secondary Pump? Explained | Animation | #hvac #hvacsystem

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Primary Pumps

Location: Directly connected to the chillers themselves.
Purpose: Circulate chilled water through the chiller's evaporator, where heat from the building is absorbed, and then back to the chillers.
Flow Rate: Often designed with a constant flow rate to ensure the chillers operate at their optimal efficiency.
Types: Can be dedicated (one pump per chiller) or headered (multiple pumps serving multiple chillers).

Secondary Pumps

Location: Part of the separate chilled water distribution loop to the building.
Purpose: Distribute the chilled water from the primary loop out to the various air handling units, fan coil units, or other cooling equipment throughout the building.
Flow Rate: Designed with variable speed drives (VFDs) to precisely adjust flow as cooling demand in the building changes.
Control: Operate based on a differential pressure setpoint within the distribution loop, ensuring that there's a consistent supply of chilled water at the needed locations.

Two way valve and Three way valve detailed explanation.
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I think colur coding for primary-secondary CHW system is wrong (3:03)

sampatil-fd
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Thank you for your information, i need more video about HVAC like troubleshooting in package, outdoor dx AHU, pump, motor, more about electrical and isolation rooms and cooled rooms systems

mohamedyasar
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Thank you for information what about cooling tower operation?

hantuidola
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00:02 Two types of pumps used in chiller plant: primary and secondary
00:29 Primary chilled water system uses only a primary pump.
01:10 Primary pump in HVAC system circulates chilled water from chiller to AHU.
01:45 Primary chilled water system less efficient than primary secondary system
02:16 Primary secondary chilled water system uses two pumps
02:49 Primary pump sends water to chiller for consistent flow
03:22 Primary and secondary pumps prevent water mixing in HVAC systems.
03:54 Primary and secondary pumps explained in HVAC system
Crafted by Merlin AI.

lilbox
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How and when Evaporator coil get water??

faisal-hwcm
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return chill water and supply chill water are mixed in the header. Can you explain it?

Dizzyofficial
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Can you explain what is chiller condenser STD and HOP, LOP

valley
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Can u tell me ESP and chilled water presssure calculation

nihilnandhan
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I have not understand the piping and secondary pump function.Explain it in more easy way with detail

jojo