AirBoss System Design Day
Tonnage # of Units Compressor 1 Compressor 2 condenser fan supply fan Unit FLA AirBoss FLA Unit Total Amps kW kw/hr 
25 5 18.60 18.60 5.00 6.89 49.09 8.30 245.45 112.91 30.11
20 3 20.00 13.20 5.00 4.14 42.34 4.98 127.02 58.43 15.58
 
Total  185 8   13.28 372.47 171.34 51.80

 

Table 4. AirBoss System energy usage.

Even though the AirBoss system uses more energy during design days, those days make up about 1% of the cooling season.  In addition, the amount of compressor capacity required for a design day is reduced by ~20%, which decreases the upfront capital equipment cost. To get a more accurate energy reduction for the entire cooling season, the simulations were modeled for part load conditions at 150 tons as shown in Figure 10.  The RTU’s performance for a conventional system is shown in Table 5 and Table 6 shows the AirBoss system.

 

Figure 10. Part load design parameters at 150 tons.

 

Conventional

System

 85 Ambient
Tonnage # of Units Airflow MBh SHC EAT LAT
25 4 7500 294.20 204.04 78/67 54/53.9
20 6 6400 261.22 170.34 78/67 54.5/53.5
     
Total  220 10 68400 2744.12 1838.20

 

 Table 5. Conventional system equipment list and performance.

AirBoss 

System

 85 Ambient
Tonnage # of Units Airflow MBH SHC EAT LAT
25 5 9000 283.70 185.16 75/65 55.5/54.5
20 3 7200 258.43 169.00 75/65 53.5/52.9
   
Total  185 8 66600 2193.79 1432.80

 

 Table 6. Conventional system equipment list and performance.

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