If you are not following the ASHRAE guide line, there is usually no problem with over cooling. There is no real need to cool the duct air to below 18°C.
With real systems, a dehumidifier place in a room, blows the air through the condenser coil after the air is cooled and water condensed out. There is net gain in heat load, as the compressor and fan power are added to the room.
In an AHU situation, the additional heat is in the machine room. There are many ways to channel the condenser heat back into the air duct. In EPlus, this would be a Heat Exchanger between the condenser and the supply air duct.
What is your VRF? If it is variable refrigerant feed, you can simply add a condenser coil after the cooling coil, so that part of the condenser heat would be returned to the zone supply air.
VRF may also mean variable rate fan.
Dr. Li
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: soohyeunyang@xxxxxxxxx
Date: Wed, 28 Nov 2012 02:11:34 +0000
Subject: [EnergyPlus_Support] Dehumidification in air-conditioner
I have a question about dehumidification in air-conditioner.
I have constructed the air conidtioning system with VRF heatpump and AirLoopHVAC Heat Pump model.
Generally, as the air is cooler, indoor humidity is decresed in cooling mode.
But, dehumidification rate is so slow compared to the drop rate in temperatrue.
How can i solve this problem?
Please give me a tip.
Thank you.
__._,_.___
Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx
The primary EnergyPlus web site is found at:
http://www.energyplus.gov
The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/
Attachments are currently allowed but be mindful that not everyone has a high speed connection. Limit attachments to small files.
EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
![]()
__,_._,___
With real systems, a dehumidifier place in a room, blows the air through the condenser coil after the air is cooled and water condensed out. There is net gain in heat load, as the compressor and fan power are added to the room.
In an AHU situation, the additional heat is in the machine room. There are many ways to channel the condenser heat back into the air duct. In EPlus, this would be a Heat Exchanger between the condenser and the supply air duct.
What is your VRF? If it is variable refrigerant feed, you can simply add a condenser coil after the cooling coil, so that part of the condenser heat would be returned to the zone supply air.
VRF may also mean variable rate fan.
Dr. Li
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: soohyeunyang@xxxxxxxxx
Date: Wed, 28 Nov 2012 02:11:34 +0000
Subject: [EnergyPlus_Support] Dehumidification in air-conditioner
I have a question about dehumidification in air-conditioner.
I have constructed the air conidtioning system with VRF heatpump and AirLoopHVAC Heat Pump model.
Generally, as the air is cooler, indoor humidity is decresed in cooling mode.
But, dehumidification rate is so slow compared to the drop rate in temperatrue.
How can i solve this problem?
Please give me a tip.
Thank you.
__._,_.___
Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx
The primary EnergyPlus web site is found at:
http://www.energyplus.gov
The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/
Attachments are currently allowed but be mindful that not everyone has a high speed connection. Limit attachments to small files.
EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
Your email settings: Individual Email|Traditional
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch to Fully Featured
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch to Fully Featured
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe
__,_._,___