[Bldg-sim] "overcooling" benchamark

[Felipe Duran B-GREEN]

Thank you all! your comments are very helpful.I will work with 17C and 19C
for an initial evaluation using an airflow network.

Kind Regards,



2014-02-18 4:48 GMT-03:00 Chris Yates <chris.malcolm.yates at gmail.com>:

> Felipe is quoting a Cibse overheating criterion for summertime comfort -
> not a heating scenario but a cooling one.
>
> Regarding the table/ graph in Ashrae 55. I found it much harder to comply
> with than the cibse guidance. I understand that the cibse guidance is
> structured to encourage the take up of natural ventilation.
>
> Cibse Method: A full weather year of simulation is done and excessive
> temperatures are binned out of the results. Appropriate weather data (hot)
> needs to be used for it to be meaningful.
>
> Network airflow is required in the simulation tool.
>
> I think Felipe is looking for comparable criteria.
>
> Sent from my Android device. Please excuse typos, etc.
> On 18 Feb 2014 02:16, "Aaron Smith" <asmith at mreng.ca> wrote:
>
>> The ASHRAE standard appears to be written for buildings which eliminate
>> cooling systems but I think the lower line could be used when you are
>> trying to eliminate a heating system?
>>
>> Aaron
>>
>> Aaron Smith, P.Eng
>> M&R Engineering Ltd.
>>
>> Sent from my BlackBerry 10 smartphone on the TELUS network.
>>   Original Message
>> From: Aaron Smith
>> Sent: Monday, February 17, 2014 22:03
>> To: Felipe Duran B-GREEN; bldg-sim at lists.onebuilding.org
>> Subject: Re: [Bldg-sim] "overcooling" benchamark
>>
>> Hello,
>>
>> ASHRAE Std. 55 has a chart that you can use for naturally conditioned
>> spaces.   You can determine an acceptable operative temperature based on
>> the mean monthly outdoor temperature. I'm not aware of an acceptable
>> exceedance though.
>>
>> Aaron
>>
>> Aaron Smith, P.Eng
>> M&R Engineering Ltd.
>>
>> Sent from my BlackBerry 10 smartphone on the TELUS network.
>>   Original Message
>> From: Felipe Duran B-GREEN
>> Sent: Monday, February 17, 2014 12:28
>> To: bldg-sim at lists.onebuilding.org
>> Subject: [Bldg-sim] "overcooling" benchamark
>>
>> Dear Group,
>>
>> I am wondering if there is a "overcooling" benchmark such as CIBSE
>> overheating benchmark (1% of occupied period over 28C operative
>> temperature). I am evaluating a naturally ventilated building and I need a
>> benchmark to figure out if the building needs a heating system in a pretty
>> moderated climate.
>>
>> Many Thanks,
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