[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[EnergyPlus_Support] The difference of cooling energy in output results



Hi all,

I am quite confused about the output tabular results from E+. I used a PNNL typical small office file to simulate and when I look into the HTML output file, the total cooling energy in the End Uses part, is
                Electricity   Gas
Heating  13.75 
2.38
Cooling 10.29 0.00

Fans     
  23.84 0.00

But for the OVERALL HVAC AIR SYSTEM LOADS of each system

AIR LOOP TOTAL HEATING ENERGY [GJ] AIR LOOP TOTAL COOLING ENERGY [GJ]
6.53E+00 6.20E+00 System 1
5.60E+00 7.50E+00 System 2
5.59E+00 6.31E+00 System 3
7.96E+00 9.04E+00 System 4
4.37E+00 1.14E+01 System 5
3.00E+01 4.05E+01 Total

And for OVERALL HVAC SYSTEM ENERGY
ELECTRICITY:HVAC [GJ]
4.79E+01
I believe for the cooling part, the airloop total heating+cooling = 70 GJ should be equal to the End Uses: cooling + heating+fan - service water heating energy= somewhere around 40 GJ and should be equal to overall HVAC system energy=47.9 GJ
But apparently they are all different than my expectation. So can anyone tell me what are the differences between those values?
And if I want the monthly electricity consumption for cooling, what value should I choose?

The HVAC systems are
    Heating type Air-source heat pump with gas furnace as back up
    Cooling type Air-source heat pump
    Distribution and terminal units Single zone, constant air volume air distribution, one unit per occupied thermal zone

Many thanks,

HJ


__._,_.___


Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx

The primary EnergyPlus web site is found at:
http://www.energyplus.gov

The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/

Attachments are currently allowed but be mindful that not everyone has a high speed connection.  Limit attachments to small files.

EnergyPlus Documentation is searchable.  Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.



Your email settings: Individual Email|Traditional
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch to Fully Featured
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe

__,_._,___