Patent ID: 11921478
Assignee: CLEAN POWER RESEARCH, L.L.C.
Field: Computer technology (Electrical engineering)
Classification: CPC F  G | IPC F  G

Claim 2:
3. A system according to claim 2, the computer further configured to:
find the efficiency of the HVAC system ηHVAC of the building in accordance with:, η
   HVAC
  
  =
  
   
    [
    
     
      
       M
       ⁡
       (
       
        
         T
         
          t
          +
          
           Δ
           ⁢
           t
          
         
         Indoor
        
        -
        
         T
         t
         Indoor
        
       
       )
      
      
       Δ
       ⁢
       t
      
     
     -
     
      
       UA
       Total
      
      (
      
       
        
         T
         _
        
        Indoor
       
       -
       
        
         T
         _
        
        Outdoor
       
      
      )
     
     -
     
      
       (
       
        C
        1
       
       )
      
      ⁢
      
       P
       _
      
     
     -
     
      
       Electric
       _
      
      (
      
       C
       2
      
      )
     
    
    ]
   
   [
   
    1
    
     
      HeatOrCoolR
      HVAC
     
     ⁢
     
      Status
      _
     
    
   
   ]
  
 

where M represents the thermal mass, t represents the time at the beginning of the empirical test, Δt represents the duration, Tt+ΔtIndoor represents the ending indoor temperature, TtIndoor represents the starting indoor temperature, UATotal represents the thermal conductivity, TIndoor represents the average indoor temperature, TOutdoor represents the average outdoor temperature, C1 represents a conversion factor for occupant heating gains, P represents the average number of occupants, Electric represents average electricity consumption, C2 represents a conversion factor for non-HVAC electric heating gains, Status represents an average status of the HVAC system system during the empirical test, HeatOrCool is a binary number that is 1 in the heating season and −1 in the cooling season, and RHVAC represents the rating of the HVAC system.