Hi Experts,
Happy New Year to All,
Could some experts throw light on HVAC validation protocols such as DQ,IQ,PQ & OQ.
Is it related to ASHRAE or Building Codes?
Best regards,
Manu
Dear Experts,
I could not get the influential temperature zone for cassette unit terminal device.
Was planning for Daikin make : FXFQ63LUV1 model no.
Has anyone used this in any projects. Appreciate share the zone that can be covered by the throw from this unit.
Details noted below:
Room...
Hi Experts,
As I understand the new Ventilation meeting Energy savings would work on Carbon dioxide sensors output.
However in some occasions there has been cases where carbon monoxide sensors are also used.
I believe Carbon monoxide is used in Parking lots and Carbon dioxide in Human...
Hi Experts,
Can I use a soft starter for AHU of 14000CFM. FCU of 4TR hopefully can be connected to direct online.
Please share your thoughts.
Thanks,
Manu
Hi Experts,
What should be parameters for a no of coils decision for a AHU.
As the coil no increases from 4 to 6 or 8, the gap becomes less and can cause a high bypass factor.
What implications should be taken care while the no of rows is decided.
Thanks in advance.
Manu
Hi Experts,
I have been into Chill based. There has some need into VRV.
Would some expert please throw light on below.
Do all VRV have indoor units having its electronic expansion valve? What are the options available?
I have heard people using AHU along with VRV. How does that help when...
Hi Experts,
I was pondering over the selection of the chiller starter. I was tempting to with Soft starter as project specification gives option against Star-Delta. I have used Soft start for Air cooled versions uptill 500TR chiller capacity, multi compressor. But have a single compressor...
Hi Experts,
There is a need to achieve 62db Pressure levels inside an AHU room that handle 150K CFM.
Would sound attenutaor in the return line help or in the supply.
Since the work is warm shell, the ducting and further work outside the AHU is not in scope.
There is a mixing box planned hope...
Hi Experts,
PICV as the brochure is a combination of flow control that works to deliver the required chill water flow irrespective of upstream pressure pressure in the pipe line. When that is the case I believe there is no need to have double regulating valve or other control valves. As the...
Dear Experts,
Is there any corelations available to calculate the static head developed in terms of Pascals for a given room when the supply and exhaust air flow rates are known. How to calculate the condensate that can be recovered over a year's period. The plan is to use the condensate as...
Hi Experts,
In a 100% fresh air airconditioning requirement for a building. The AHU is supplying treated FA thru ducts to various rooms.
Is it mandatory to have ducts for exhausting the air from these rooms. If the leakage is the only method of exhaust it will keep on increasing the room...
Dear Experts,
Is it possible to meet IPLV and COP simultaneously in a chiller selection.
What will be the trade off that is to be taken. Given a best case what would be the ideal COP that can be achieved without compromising IPLV.
Would SEER and EER be affected by the IPLV figures being the...
Dear Experts,
Can you please let me know whether any high level ballpark figures that industry uses is available for quick estimation.
CFM per tonnage.
GPM/tonnage
CFM per Sq.M area or Tonnage/Sq.M at gross level.
I understand this will not be accurate but for a gut feel checking.
Best...
Dear Experts,
After the chilled water pipes are commissioned, what is the water flushing procedure to be followed.
How many times the flushing is to be done for the pipes. What are the chemicals to be used in this cleaning process.
Highly appreciate if any standards or procedure can be...
Dear Experts,
Can you please help me with the suggested brands or model for a Propeller pump.
In the design there is mention about propeller pump to pump diesel. How is Propeller pump different from Centrifugal pump?
Thanks in advance for your time.
Best regards,
Manu
Hello Experts,
I was looking for the details for the water quality for humidification system in AHU of HVAC system.
Can you please provide the permissible limits of the TDS (Total dissolved salts).
I found that most of the softners handle the Calcium and Magnesium salt in the TDS. However...
Dear Experts,
In a closed loop chilled water system with chiller, primary and secondary pumps, we have a thermal storage tank that can store chilled water. The water in the tank is maintained at 6.7deg.C and when chiller is out of service, water stored in the thermal storage tank will be the...
Dear Experts,
For a primary and secondary chilled water pump application, I was contemplating to use end suction pump for its simplicity, less procurement time and efficient working when compared over a split case pump.
Split case pumps are convenient from maintenance perspective, however...
Hi Experts,
May I know the HVAC commissioning tests that are mandatory. Are there any specific templates available for these tests.
Is this tests to be witnessed by ASHRAE certified Test personnel.
Are there any specific conditions and test requirements that are needed for this test for...
Hi Experts,
Could you please share your input on the calculation of the pressure drop for the diesel pipes. These pipes run from the main tanks that are underground to the day tanks inside the generator room.
I remember there is some chart that provide pressure drop versus flow rate of diesel...
