[Hap-users] VRF Controls

[Aaron Smith]

Hello Paula,

I've tried to respond to your questions below:

Point 3: If outdoor air is provided through the VRF fan coils then you will
need to have the fans operate continuously (fan on).  If you have a separate
system to provide outdoor air then you can have the VRF fan coils cycle.

Point 4: It is difficult to help you respond to this without knowing more
about the building, your climate and the energy model.  VRF systems are very
efficient in providing heating in mild climates - you can refer to the COP
in your outdoor ambient temperature range.  If you have a heat recovery type
VRF, the recovered heat can also contribute to significant savings.

Regards,
Aaron


Aaron Smith, P.Eng
Principal, Mechanical Engineer
LEEDR AP BD+C, BEMP, BEAP, CGD
M&R Engineering Ltd.

Date: Wed, 7 Dec 2022 08:22:36 -0300
From: Paula A Hern?ndez <paulahernandez4 at fibertel.com.ar>
To: <hap-users at lists.onebuilding.org>
Subject: [Hap-users] VRF Controls
Message-ID: <00a001d90a2e$35b09a80$a111cf80$@fibertel.com.ar>
Content-Type: text/plain; charset="iso-8859-1"

Hello,

 

I am modeling a building with VRF systems.

 

The reviewer has made the following comments.

 

Point 3: If I chance the fan control to ?Fan On?, the energy savings falls
to 14%, which is not good.

How may I justify the fan control steel ?Fan Cycled? and that outdoor air is
delivered wheb the spaces area occupied?

 

Point 4: would you please help me to justify this amount of savings for
space heating.

 

Thank you,

 

 



 

 

 



Ingeniera Paula Andrea Hern?ndez LEED  AP (BD +C) / Edge Expert & Auditor

Capitulo Argentino de ASHRAE 

 

Estudio Ingeniero Mario Pedro Hern?ndez

Cel: 11 1559221377 (+54 9 1159221377)

Tel./Fax: 4302-9561 Tel.: 4303-3481

Av. Montes de Oca 1103 5? D - C.A.B.A.

Web Site:  <http://www.mphingenieria.com.ar/> www.mphingenieria.com.ar

e-mail:  <mailto:mphingenieria at fibertel.com.ar>
paulahernandez4 at fibertel.com.ar

 

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