PS
Mechanical
- May 16, 2017
- 56
Dear Engineers,
I work as HVAC Design Engineer in a contracting company.
I wish to gain knowledge regarding chiller selections. Especially arriving the total number of chillers and total number of secondary pumps needed for a system.
I'm working on a commercial building project for office use. It has 12 floors and all are similar except the first floor which has kitchen and pantry.
The cooling loads are: 1st Floor: 180 TR;
2nd to 11th Floor: 130 TR;
12th Floor: 160 TR;
Total: 1640 TR
The consultant has proposed:
Air-cooled Chillers : 200 TR x 5 Nos (4W + 1S) = 800 TR
Water-Cooled Chillers: 350 TR x 3 Nos (2W + 1S) = 700 TR
Proposed 1500 TR;
Diversity: 91.5%
Primary Pumps: 8 Nos (BASED ON THE NUMBER OF CHILLERS USED)
Secondary Pumps: 6 Nos (4W + 2S)
Are there any thumb rules for the above proposal? How do one arrive to these numbers?
Would anyone please help me gain knowledge regarding the selections? Are there any resources that I can refer to?
Thanks in advance for the support!
I work as HVAC Design Engineer in a contracting company.
I wish to gain knowledge regarding chiller selections. Especially arriving the total number of chillers and total number of secondary pumps needed for a system.
I'm working on a commercial building project for office use. It has 12 floors and all are similar except the first floor which has kitchen and pantry.
The cooling loads are: 1st Floor: 180 TR;
2nd to 11th Floor: 130 TR;
12th Floor: 160 TR;
Total: 1640 TR
The consultant has proposed:
Air-cooled Chillers : 200 TR x 5 Nos (4W + 1S) = 800 TR
Water-Cooled Chillers: 350 TR x 3 Nos (2W + 1S) = 700 TR
Proposed 1500 TR;
Diversity: 91.5%
Primary Pumps: 8 Nos (BASED ON THE NUMBER OF CHILLERS USED)
Secondary Pumps: 6 Nos (4W + 2S)
Are there any thumb rules for the above proposal? How do one arrive to these numbers?
Would anyone please help me gain knowledge regarding the selections? Are there any resources that I can refer to?
Thanks in advance for the support!