
 BLC22D - Reduced number of reported variables to BLC22C    880628       

 SUPERBLOCK 1
      BLOCK 1
          UNIT  1     TYPE 62 - Boiler model with a tankless coil            
          UNIT  2     TYPE 63 -  Domestic hot water coil                     
          UNIT  3     TYPE 64 -  Boiler burner and water pump control        

 UNIT   1      TYPE  62
 Boiler model with a tankless coil                                       

 1     INPUTS:
        TEMPERATURE      1 - tstk   : stack gas temperature                    
        TEMPERATURE      2 - tra    : room air temperture                      
        TEMPERATURE      3 - toa    : outdoor air temperature                  
        TEMPERATURE      4 - tblw   : boiler water temperature                 
        PRESSURE         1 - psw    : supply water pressure                    
        FLOW             1 - wsw    : supply water flowrate                    
        TEMPERATURE      5 - trw    : return water temperature                 
        POWER            1 - qcw    : heat flowrate to domestic hot water coil 
        CONTROL          1 - swch   : control switch for on/off                

 2     OUTPUTS:
        TEMPERATURE      1 - tstk   : stack gas temperature                    
        TEMPERATURE      4 - tblw   : boiler water temperature                 
        TEMPERATURE      6 - tsw    : supply water temperature                 
        POWER            2 - qhwt   : heat gain of water                       
        POWER            3 - qstk   : heat loss from stack                     
        POWER            4 - qinput : heat input rate                          
        POWER            5 - qltnt  : latent heat loss                         
        POWER            6 - qjakt  : heat loss thru boiler jacket             
        POWER            7 - qdiff  : error of input and output                

 3     PARAMETERS:
          0.736000E-01 vgf    : volume of gas in the boiler fire-box (m3)     
          0.175500     asf    : boiler fire-box effective radiation heat trans
           0.00000     arf    : boiler fire-box refractory surface area (m2)  
          0.381000     lgpf   : gas-path length in the boiler fire-box (m)    
          0.800000     emisf  : fire-box surface emissivity value in fraction 
          0.776000E-01 vwb    : volume of water in the boiler (m3)            
           2.60000     ajakt  : boiler jacket surface area (m2)               
          0.169290E-02 ujakt  : boiler jacket u-factor (kW/m2-C)              
           1.00000     carb   : atomic ratio of carbon in fuel                
           1.84400     hydr   : atomic ratio of hydrogen in fuel              
           0.00000     oxyg   : atomic ratio of oxygen in fuel                
           0.00000     xntr   : atomic ratio of nitrogen in fuel              
          0.300000E-02 sulf   : atomic ratio of sulfur in fuel                
           45327.0     hfuel  : fuel higher heating value (kJ/kg)             
          0.839000     cpfuel : fuel specific heat value (kJ/kg-C)            
          0.126600E-02 wfuel  : fuel supply rate (kg/s)                       
           26.5000     tfuel  : fuel temperature (C)                          
          0.200000     xair   : execess combustion air (-)                    
          0.790000     effyss : boiler full load efficiency (-)               
           95.0000     tblws  : boiler water temp. at steady state (C)        
           320.000     tsgs   : stack gas temperature at full load (C)        
          0.925000     icfgon : integration control for on-period stack gas te
           3.14000     icfgof : integration control for off-period stack gas t
           1.38000     icfw   : integration control for boiler water temperatu
           3.00000     dtfg   : short start period for burner on/off cycle (s)
          0.231250     icfgns : integration control for short start on-period 
          0.462500     icfgfs : integration control for short start off-period
           30.0000     dtbw   : time interval for updating qss (s)            

 UNIT   2      TYPE  63
  Domestic hot water coil                                                

 1     INPUTS:
        TEMPERATURE      4 - tblw   : boiler water temperature                 
        FLOW             2 - wcw    : water flowrate thru the coil             
        TEMPERATURE      7 - ticw   : coil inlet water temperature             

 2     OUTPUTS:
        TEMPERATURE      8 - tocw   : coil outlet water temperature            
        POWER            1 - qcw    : heat flowrate to the coil water          

 3     PARAMETERS:
          0.193000E-01 dcoil  : diameter of the coil (m)                      
           4.20600     lcoil  : length of the coil (m)                        

 UNIT   3      TYPE  64
  Boiler burner and water pump control                                   

 1     INPUTS:
        TEMPERATURE     10 - tburn  : burner control temperature               
        TEMPERATURE      4 - tblw   : boiler water temperature                 
        TEMPERATURE      9 - tload  : load temperature                         
        CONTROL          2 - ctherm : thermostat control indicator 1/0 for auto
        FLOW             2 - wcw    : water flowrate thru the coil             

 2     OUTPUTS:
        CONTROL          1 - swch   : burner control on/off signal             
        FLOW             1 - wsw    : boiler circulating water flowrate        

 3     PARAMETERS:
           85.0000     tburon : boiler burner-on temperature (C)              
           98.9000     tburof : boiler burner-off temperature (C)             
           70.0000     tpmpon : boiler water pump-on temperature (C)          
           80.0000     tpmpof : boiler water pump-off temperature (C)         
          0.286100     wpump  : circulating water flowrate (kg/s)             
          0.100000E-03 rateof : minimum water flow rate ratio when pump off (-
 Initial Variable Values:

 PRESSURE         1 ->     0.00000                 (kPa)  
 FLOW             1 ->     0.00000                 (kg/s) 
 FLOW             2 ->     0.00000                 (kg/s) 
 TEMPERATURE      1 ->     315.000                 (C)    
 TEMPERATURE      2 ->     26.5000                 (C)    
 TEMPERATURE      3 ->     17.0000                 (C)    
 TEMPERATURE      4 ->     30.0000                 (C)    
 TEMPERATURE      5 ->     57.3800                 (C)    
 TEMPERATURE      6 ->     30.0000                 (C)    
 TEMPERATURE      7 ->     14.0000                 (C)    
 TEMPERATURE      8 ->     28.0000                 (C)    
 TEMPERATURE      9 ->     25.0000                 (C)    
 TEMPERATURE     10 ->     80.0000                 (C)    
 CONTROL          1 ->     1.00000                 (-)    
 CONTROL          2 ->     0.00000                 (-)    
 POWER            1 ->     0.00000                 (kW)   
 POWER            2 ->     0.00000                 (kW)   
 POWER            3 ->     0.00000                 (kW)   
 POWER            4 ->     0.00000                 (kW)   
 POWER            5 ->     0.00000                 (kW)   
 POWER            6 ->     0.00000                 (kW)   
 POWER            7 ->     0.00000                 (kW)   
 Simulation Error Tolerances:

 1      RTOLX=   0.100000E-03      ATOLX=   0.100000E-04
        XTOL=    0.200000E-03      TTIME=    1.00000    

 SUPERBLOCK 1
 2      FREEZE OPTION 0      SCAN OPTION 0
 The following are Boundary Variables in the simulation:

 FLOW            2
 TEMPERATURE     9
 TEMPERATURE    10
 CONTROL         2

 SUPERBLOCK 1      REPORTING INTERVAL    120.000    
 TEMPERATURE      1
 TEMPERATURE      4
 TEMPERATURE      8
 CONTROL          1
 POWER            1
 POWER            2
 POWER            4
