HAP
HAP
(OP)
I never use this program myself.
I am wondering if you can use it to check the loads over every month of the year.To look at Solar gain in cooling months otherwise not viewed as the time of peak cooling because of temperatures.
Southern glass is great for passive solar heating, but in a year round cooling scenario, some times it adds a lot more sensible load than was allowed for in the summer
I am wondering if you can use it to check the loads over every month of the year.To look at Solar gain in cooling months otherwise not viewed as the time of peak cooling because of temperatures.
Southern glass is great for passive solar heating, but in a year round cooling scenario, some times it adds a lot more sensible load than was allowed for in the summer
Take the "V" out of HVAC and you are left with a HAC(k) job.





RE: HAP
RE: HAP
Take the "V" out of HVAC and you are left with a HAC(k) job.
RE: HAP
Take the "V" out of HVAC and you are left with a HAC(k) job.
RE: HAP
The new version of Trace 700 does.
RE: HAP
HAP does not model UFAD directly but with a few changes you can make it work. Review attached PDFs. I am doing UFAD with air columns (large fan powered boxes going in to the floor.
RE: HAP
I am reviewing a substantial job right now that was desigend with HAP.
I had seen in the ASHRAE guide how you divide up loads between the space and the plenum because of the stratification, get your CFM because of the room load, then use that CFM and the return load to come up with a return temperature.
I guess then the trick is to get the heat from the return plenum that goes into the floor slab above which reheats the supply air for the floor above.
What I have been noticing in my review though is an overly consrvative attempt to adapt HAP to UFAD in the project I am looking at. It seems to be double counting the plenum heat. It is carried as going right to the coil as return from one floor, then is carried again as heat transmitted through the slab to the zone above.
So I was a little excited to read the October 2007 Journal article on the UFAD calculations as it sounded like Berkely's CBE had a design tool available - basically a spread sheet that would convert the output of typical calc programs from say HAP, Elite etc, run for overhead systems into UFAD systems.
But, this design tool does not seem available yet.
No shortage of the ECM powerd fan floor boxes on this project.
Take the "V" out of HVAC and you are left with a HAC(k) job.
RE: HAP
The job I am working on now uses Four 12,000 CFM air columns per 28K floor plate and numerous ECM series boxes to offset skin losses. The series boxes have fan shifting to slow the fan down when setpoint is reached. Core areas are covered with conventional overhead VAV terminals.
RE: HAP
Computers and whatever is plugged in?
Take the "V" out of HVAC and you are left with a HAC(k) job.
RE: HAP
RE: HAP
Take the "V" out of HVAC and you are left with a HAC(k) job.