Daikin AIR COOLED VRV ESTIMATED ENERGY USAGE & RUNNING COST CALCULATION | ||||||

Cooling | Heating | Heating Use Factor | 0.5 | |||

WORKING DAYS PER YEAR | 130 | 235 | ||||

OPERATION HOURS PER DAY | 10 | Y/N *8 | ||||

ESTIMATED AREA OF CONDITIONED SPACE (m^{2}) |
IS VRV 2P HP? | N | ||||

COST OF ELECTRICITY per kWhr (Pence) | 9 | IS VRV 3P HR? | Y | |||

SUMMER | WINTER | |||||

Condensing Units | AMBIENT 29°C | AMBIENT 10°C | AMBIENT -5°C | AMBIENT -5°C | ||

(Power Input at Average Index) | MAXIMUM POWER | AVERAGE POWER | MAXIMUM POWER | AVERAGE POWER | ||

TYPE | No SYSTEMS | INPUT (kW) | INPUT (kW) *1 | INPUT (kW) | INPUT (kW) *7 | |

RX(Y/E)Q20P | 1 | 9.78 | 6.42 | 13.60 | 10.90 | |

TOTAL INDEX | 650.00 | 9.78 | 6.42 | 13.60 | 10.90 | |

Fan Coil Units | MAXIMUM POWER | AVERAGE POWER | ||||

MODEL *3 | No FCU | TOTAL INDEX | 100% INPUT (kW) *6 | 10% DIV (kW) *4 | ||

20 | 0 | 0.00 | 0.00 | 0.00 | ||

25 | 8 | 200.00 | 1.10 | 0.99 | ||

32 | 7 | 218.75 | 1.29 | 1.16 | ||

40 | 0 | 0.00 | 0.00 | 0.00 | ||

50 | 2 | 100.00 | 0.55 | 0.50 | ||

63 | 2 | 125.00 | 0.51 | 0.46 | ||

80 | 0 | 0.00 | 0.00 | 0.00 | ||

100 | 0 | 0.00 | 0.00 | 0.00 | ||

125 | 0 | 0.00 | 0.00 | 0.00 | ||

140 | 0 | 0.00 | 0.00 | 0.00 | ||

200 | 0 | 0.00 | 0.00 | 0.00 | ||

250 | 0 | 0.00 | 0.00 | 0.00 | ||

TOTALS | 19 | 643.75 | 3.45 | 3.11 | ||

Ventilation (VAM's) | ||||||

TYPE | No VAM UNITS | POWER INPUT (kW)*6 | TOTAL INSTALLED COOLING CAPACITY | |||

1500/2000 | 0 | 0.00 | SENSIBLE (kW) | TOTAL (kW) | ||

800/1000 | 0 | 0.00 | 47.28 | 59.10 | ||

650 | 0 | 0.00 | ||||

350/500 | 0 | 0.00 | AVERAGE INSTALLED COOLING CAPACITY | |||

150/250 | 0 | 0.00 | SENSIBLE (W/m2) | TOTAL (W/m2) | ||

TOTALS | 0 | 0.00 | #DIV/0! | #DIV/0! | ||

Summary | ||||||

At Average Conditions | Cost £/m2/Year | kWhr/year | Cost £/kWhr | Total Cost (£) | ||

FAN COILS ONLY | #DIV/0! | 11,333.25 | 0.090 | 1,019.99 | ||

VAM'S ONLY | #DIV/0! | 0.00 | 0.090 | 0.00 | ||

COOLING ONLY SYSTEMS | #DIV/0! | 0.00 | 0.090 | 0.00 | ||

HEAT PUMP SYSTEMS *8 | #DIV/0! | 0.00 | 0.090 | 0.00 | ||

HEAT RECOVERY SYSTEMS *2 *8 | #DIV/0! | 33,957.75 | 0.090 | 3,056.20 | ||

GRAND TOTALS | #DIV/0! | 45,291.00 | £ 4,076.19 | |||

POWER INPUT AT | kW | 19.30 | ||||

AVERAGE RUNNING CONDITIONS (Shaded) | 10.34 | AMPS/Ø | ||||

POWER INPUT AT | kW | 26.83 | ||||

MAXIMUM LOAD CONDITIONS (for Electrical Loading) | 14.75 | AMPS/Ø | ||||

*1) It is assumed the VRV Systems will operate continuously at 50% of their installed maximum capacity, for the indicated HOURS/DAYS

*2) For Heat Recovery, an arbitary diversity factor of 15% has been used for Heat Recovery mode (Simultaneous Cooling/Heating).

*3) FCU Power INPUT is taken as the MAXIMUM in the range for each of the sizes. All Power Inputs are measured at HIGH Speed.

*4) FCU are assumed to operate 100% during WORKING HOURS with 10% diversity for LOW speed use and units that are OFF.

*5) The running costs are based on AVERAGE power requirements. MAXIMUM power is for Electrical Supply Designs.

*6) FCU & VAM Units are SINGLE PHASE and are assumed to be loaded equally across the THREE PHASE Supply of AC System.

*7) Heating Factor is the Ratio of Calculated Heating Load to Installed Heating Capacity, which reflects the Average Power Input

*8) It is necessary to identify VRV systems as either Heat Pump or Heat Recovery, if Heat Recovery *2 Applies