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Re: [TRNSYS-users] How to simulate HVAC and radiant thermal heat gain and power consumption in Type56

Dear Lee

Noted that. Ive simulated it using radiative and convective load to the zone by introducing heat tx to the gain of each zones. 

If let say ive got 5 zones, should i sum up the heat tx by radiative for each zones to get the heat gain by the heating of radiator for the type56 for a particular time?

Thanks
Safwan


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-------- Original message --------
From: C K Lee <a8304506@graduate.hku.hk>
Date:
To: "TRNSYS users mailing list at OneBuilding.org" <trnsys-users@lists.onebuilding.org>
Cc: safone samsuddin <s_wanone@yahoo.com>
Subject: Re: [TRNSYS-users] How to simulate HVAC and radiant thermal heat gain and power consumption in Type56


Hello, Safone.

You can define a gain type in Type56 which read the radiative and
convective load delivered by the radiator through defined inputs of
Type56.  Your heat pump model should read the zone information from
Type56 and output the respective radiative and convective loads
developed for connection to the input of Type56.  Of course, as David
has mentioned, you need to add control equipment to control the
operation of your heat pump.

Best Regards
LEE, Chun Kwong
Research Fellow
City University of Hong Kong

On 2015-09-22 00:44, David BRADLEY wrote:
> Safwan,
>    Most of the HVAC equipment models include an output that will tell
> you how much energy they transferred to their air (or water) stream
> and also how much power they consumed. It sounds as though your model
> makes some use of the TRNBuild automatic heating and cooling types to
> calculate space load and some use of HVAC equipment to compute energy
> consumption. I would not recommend such a method. I would recommend
> that you disable the automatic heating and cooling in TRNBuild to
> allow the zone temperatures to float. You then implement thermostat
> models in the Studio to watch the zone temperature and command the
> HVAC equipment to turn ON and OFF appropriately so as to maintain your
> desired temperature in the zones of the building.
>  regards,
>   David
>
> On 09/21/2015 07:16, safone samsuddin wrote:
>
>> Hi Everyone,
>>
>> Does anybody know how to calculate HVAC power consumption such as
>> Heat Pump and using Radiator as heating emitter in Type 56 multizone
>> building?
>> Do I need to set the heating ON in TRNSBUILD for each zones with the
>> setpoint temperature?
>> I've simulate 2 scenarios with Heating ON and off using radiant heat
>> transfer into zones. When the Heating ON, the TAIR trending of the
>> zones will try to follow the setpoint.
>>
>> However, when HEATING is OFF, the temperature TAIR and Toperative
>> will follow according Thermostat setpoint, however, it always
>> overheating when sun radiation gave extra heating into the Type 56
>> house.
>>
>> Anyone can suggest me, what would be the best solution to calculate
>> energy consumption and heat gain of the zone?
>>
>> Regards
>>
>> Safwan
>>
>> _______________________________________________
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>>
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>> [1]
>
> --
> ***************************
> 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@tess-inc.com
>
> http://www.tess-inc.com [2]
> http://www.trnsys.com [3]
>
>
> Links:
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> [1]
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