E-1.1, r. 1 - Regulation respecting energy conservation in new buildings

Section 127 Disposition versions

2012-09-01

127. The coefficient of performance mentioned in section 126 for water chillers and water source heat pumps shall be determined on the basis of the rating conditions in the following table. Except for refrigerants, these conditions shall include a fouling factor for tubes equal to 0.00018 m2 • °C/W; however, this factor may be reduced by half when non-ferrous tubes are used.

TABLE

(s. 127)

                Temperatures for standard rating conditions for water 
                            chillers and heat pumps, °C

                                     Type of water chillers
                            ______________________________________

                             a) centrifugal      Reciprocating      Hydronic 
                                compressors      without integral   system water
                             b) self-contained   condensers         source heat
                                reciprocating                       pumps
                                compressors

Water temperature leaving 
chiller                             6.7                6.7               -

Water temperature entering
chiller                            12.2               12.2               -

Water temperature leaving
condenser                          35.0                 -              35.0

Water temperature entering
condenser                          29.4                 -              29.4

Air temperature entering indoor                                    26.7 dry bulb
portion of heat pump                 -                  -          19.4 wet bulb

Air temperature surrounding    35.0 dry bulb
air or evaporative cooled      23.9 wet bulb            -                 - 
condenser

Refrigerant saturation 
temperature at the discharge
of water or evaporative 
cooled compressor                    -                40.6                -

Refrigerant saturation
temperature at the discharge
of air-cooled compressor             -                48.9                -

Liquid refrigerant 
temperature for
water or evaporative 
cooled condenser                     -               35.0                 -

Liquid refrigerant 
temperature for
air-cooled condenser                 -               43.3                 -

Air temperature 
surrounding heat
pump                                 -                 -                26.7

O.C. 89-83, s. 127.