Apache HVAC equipment sizing and weather data

[junaidbinnaseer]

Dear All

I have two questions regarding auto sizing using apache hvac which are:

1. User defined or custom made systems can not be auto sized except for equipment, cooling etc. I have a custom made FAHU with AHU DX coil system. As per ashrae load calculation done by APACHE, the total load of space is 192 kW (SL + LL) whereas Apache HVAC calculates the coil capacity as 321 kW ( Sl + LL ). Is it because the DX coil is sized on 35 °C DB? The AHU coil will only experience the space load, so why is it calculating a higher value and a different SHR than the ASHRAE Load?

2. The FAHU coil will experience a high de-humidification load. IES Ve does not have a weather file of ASHRAE table which states the de humidification parameters. How can you check that a FAHU DX coil sized by APACHE system is at peak WB than DB?

Lastly, is it advisable to use APACHE HVAC for custom made units to check space DB and RH throughout the year or Apache HVAC is better for energy simulation only?

Thanks