[Equest-users] HVAC simulation

[Sami, Vikram]

To follow up on Rohini's comments:



If your lights and equipment are on the 12/7 schedule, and you have a constant volume reheat then your supply volume is probably based on the peak condition, and anything below is reheat.  Did your cooling load also go down drastically when you switched to 12/7 mode?



Could you attach an inp file?


Vikram Sami, LEED AP
Sustainable Design Analyst
1382 Peachtree St. NE, Atlanta, GA 30309
t: 404-443-7462    f: 404.892.5823       e: vikram.sami at perkinswill.com   www.perkinswill.com<http://www.perkinswill.com/>
Perkins+Will.  Ideas + buildings that honor the broader goals of society


-----Original Message-----
From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of R B
Sent: Tuesday, June 29, 2010 8:56 AM
To: Siddharth V
Cc: equest-users
Subject: Re: [Equest-users] HVAC simulation



Depends on what kind of system you are using. looks like there is some

kind of reheat going on in the night hours during summer.

-rohini



On 6/29/10, Siddharth V <siddharth.v at tcs.com> wrote:

> Hi,

>

> I am currently using eQUEST to simulate the performance of a building (an

> ideal case), where in the HVAC operates at the below temperatures 24x7 for

> the whole year.

>

> Below are the preset values:

>

> Heat when temp <= 74F

>

> Cool when temp >= 76F

>

> Ideal temp of the building is 75F

>

> Also cool, when the outside temp >=72F

>

>

> Error in Simulation:

>

> I always see that the total heating power consumed in Jan/Dec month

> (Winter) is lesser than that July and August Month (Summers).

>

> But the simulation's outside Dry Bulb Temperature (avg, min and max

> Temperature) is higher during July/August when compared to Jan/Dec month.

>

>

> If I operate the HVAC for 12x7 (7am to 7pm) for all the days, then it

> follows the seasonal pattern (heating power is higher in Jan/Dec than

> Jul/Aug).

>

> But I need to get the power O/P when it operates for 24x7 only!

>

> Please let me know as to why this error introduced, and how to rectify it!

> Or must I add some more details in the detailed edit.

>

>

>

> Regards,

> Siddharth Venkatraraman

> Tata Consultancy Services

> Mailto: siddharth.v at tcs.com

> Website: http://www.tcs.com

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