[TRNSYS-users] 回复： TRNSYS-users Digest, Vol 84, Issue 37

[David BRADLEY]

Dear Cathy

On 12/28/2011 06:41, sun liang wrote:
>
> 1. I know that when I use the Ventilation to delivery the cold and hot 
> air into the controlled zone, the Cooling and Heating must be turn 
> off. The temperature of the controlled zone is used to adjust the 
> temperature and flow rate of the ventilating air. But I also want to 
> obtain the cooling load or heating load on this occasion. How can I 
> reach my aim?
>
Type56's automatic HEATING and COOLING Types calculate the sensible 
energy required to maintain a predefined set point temperature (also 
called the sensible load). When you change to a controller that is 
trying to maintain the zone temperature by varying the temperature and 
flow of supply air, the "load" is no longer defined; in order to define 
the load, you need to /predefine /the actual room temperature (note that 
the actual room temperature and the room setpoint temperature are not 
the same thing!). Instead, the concept of "load" is replaced by the 
actual energy that is being adding to or removed from the zone. How to 
see this quantity depends a bit on what Types are in your system. If you 
are heating using a furnace, you would look at the output of the furnace 
that tells how much energy it added to the air stream. If you are using 
heat pumps, you would look at the heat pump output that shows how much 
energy was added to the airstream. You could also use a pair of Type33s 
(psychrometrics) to compute the enthalpy of the supply (h_in) and return 
air (h_out), then compute q=mdot*(h_out-h_in).
> 2. When using TRNBuild to design the controlled zone, I am confused by 
> defining control strategy and scale in designing the Artificial Lighting.
>
The "control strategy" and "scale" fields in the Artificial Lighting 
gain window allow you to adjust the heat gains from lighting that the 
space experiences. Both are typically a value between 0 and 1 and they 
act as a multiplier on the base value that you specified using the 
"total heat gain" and "related floor area" fields. As with many things 
in TRNBuild/Type56, you have the option of selecting a constant value, 
scheduling a value, or telling Type56 that the value will come from some 
other Type (or equation) as an INPUT.

> 3. The TRNSYS software I used is Version 16 and was bought from the 
> agency of China Mainland. The agency said that I had to pay if I want 
> to upgrade my software to Version 17. I want to know how the software 
> is upgraded for free. By the way, my software does not have a serial 
> number but a Passdog.
>
The update from TRNSYS 16.x to TRNSYS 17.x is a paid update. Within each 
major version number (16, 17, etc.) there are periodic minor version 
updates (16.1, 16.2, 16.3, etc.) which are free.

Kind regards,
  David

-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

P:+1.608.274.2577
F:+1.608.278.1475
d.bradley at tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com

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