[Hap-users] VRF System Part Load Condition

2 posts / 0 new
Last post

Hi All,

Need your advice on the following:

Our job recently requires us to run energy modelling with part load condition by using VRF system. We realised that Version 4.6 added VRF system as new features. However, we are not sure how to input the various operating conditions to get the part load profile of the equipment. Would anybody be able to advise us how this is done?


Majid Sapar
Associate, Environmentally Sustainable Design
Parsons Brinckerhoff
300 Beach Road #05-00 The Concourse
Singapore 199555
+65-6533 73339 (office)
+65-6290 1434 (direct)
+65-6533 7707 (fax)
majid.h at pbworld.com


NOTICE: This communication and any attachments ("this message") may contain confidential information for the sole use of the intended recipient(s). Any unauthorized use, disclosure, viewing, copying, alteration, dissemination or distribution of, or reliance on this message is strictly prohibited. If you have received this message in error, or you are not an authorized recipient, please notify the sender immediately by replying to this message, delete this message and all copies from your e-mail system and destroy any printed copies.

Sapar, Majid Haji's picture
Joined: 2012-11-12
Reputation: 0


I understand it to be that HAP has the part load curves built into the
program. How exactly they came up with their curves I'm not sure. So
you will enter in the design capacity of the system and the full load
EER among other things, and at any given hour the part load energy usage
will be calculated based on HAP predetermined part load curves.

Nicholas J Couture, P.E., LEED AP

Mechanical Engineer

3555 Veteran's Memorial Highway, Suite M
Ronkonkoma, NY 11779
Tel: 631.981.3990 ext. 230
Fax: 631.981.3971
ncouture at emtec-engineers.com


This message is intended only for the personal and confidential use of
the designated recipient(s) named above. This is not in anyway an
official statement of Emtec Consultants or solicitation to buy our
services. Emtec Consultants does not guarantee this Email transmission
to be secure or error-free. Any reproduction or changes to our drawings
and files without the consent of Emtec Consultants is strictly

Nicholas Couture, LEED AP's picture
Joined: 2011-09-30
Reputation: 0