Annex III Measurement and calculation

United Kingdom

For establishing the values of rated and declared cooling capacity, power input, energy efficiency ratio and the seasonal energy performance ratio, measurements shall be done using the following conditions:

(a)
the reference ambient temperature at the outdoor side heat exchanger shall be 35 °C for air-cooled high temperature process chillers and 30 °C water inlet temperature to the condenser (rating point with 35 °C outdoor air temperature) for water-cooled high temperature process chillers
(b)
the outlet temperature of the liquid at the indoor side heat exchanger shall be 7 °C dry bulb temperature;
(c)
the variations of the ambient temperature throughout the year, representative of average climate conditions in the European Union, and the corresponding number of hours when these temperatures occur, shall be as set out in Table 28;
(d)
the effect of the degradation of energy efficiency caused by cycling depending on the type of capacity control of the high temperature process chiller shall be measured or a default value shall be used.

Table 16

Standard rating conditions for air-to-air heat pumps and air conditioners

		Outdoor side heat exchanger		Indoor side heat exchanger
The wet bulb temperature condition is not required when testing units which do not evaporate condensate.
		inlet dry bulb temperature °C	inlet wet bulb temperature °C	inlet dry bulb temperature °C	inlet wet bulb temperature °C
Heating mode (for heat pumps)	Outside air/recycled air	7	6	20	15 max
Heating mode (for heat pumps)	Exhaust air/outdoor air	20	12	7	6
Cooling mode (for air conditioners)	Outside air/recycled air	35	24^f1	27	19
	Exhaust air/recycled air	27	19	27	19
	Exhaust air/outdoor air	27	19	35	24

Table 17

Standard rating conditions for water/brine-to-water comfort chillers

		Outdoor side heat exchanger		Indoor side heat exchanger
		inlet temperature °C	outlet temperature °C	inlet temperature °C	outlet temperature °C
Cooling mode	water-to-water (for low temperature heating applications) from cooling tower	30	35	12	7
Cooling mode	water-to-water (for medium temperature heating applications) from cooling tower	30	35	23	18

Table 18

Standard rating conditions air-to-water comfort chillers

		Outdoor side heat exchanger		Indoor side heat exchanger
		inlet temperature °C	outlet temperature °C	inlet temperature °C	outlet temperature °C
Cooling mode	air-to-water (for low temperature applications)	35	—	12	7
Cooling mode	air-to-water (for medium temperature applications)	35	—	23	18

Table 19

Standard rating conditions for water/brine-to-air heat pumps and air conditioners

		Outdoor side heat exchanger		Indoor side heat exchanger
For units designed for heating and cooling mode, the flow rate obtained during the test at standard rating conditions in cooling mode is used.
		inlet temperature °C	outlet temperature °C	inlet dry bulb temperature °C	inlet wet bulb temperature °C
Heating mode (for heat pumps)	water	10	7	20	15 max
	brine	0	– 3^f2	20	15 max
	water loop	20	17	20	15 max
Cooling mode (for air conditioners)	cooling tower	30	35	27	19
Cooling mode (for air conditioners)	ground coupled (water or brine)	10	15	27	19

Table 20

Reference ambient temperatures for high temperature process chillers

Test point	Part load ratio of high temperature process chillers	Part load ratio (%)	Outdoor side heat exchanger (°C)	Indoor side heat exchanger
				Evaporator inlet/outlet water temperatures (°C)
				Fixed outlet
A	80 % + 20 % × (T_A -T_D )/(T_A -T_D )	100	Inlet air temperature 35	12/7
A	80 % + 20 % × (T_A -T_D )/(T_A -T_D )	100	Inlet/outlet water temperatures 30/35	12/7

Table 21

Part load conditions for air conditioners, comfort chillers and heat pumps

Rating point	Outdoor temperature	Part load ratio	Outdoor side heat exchanger		Indoor side heat exchanger
Outlet temperatures dependent on water flow rate as determined at standard rating conditions (100 % part load ratio when cooling, 88 % when heating)
Air-to-air air conditioners
	T_j (°C)		Outdoor air dry bulb temperatures (°C)		Indoor air dry bulb (wet bulb) temperatures (°C)
A	35	100 %	35		27 (19)
B	30	74 %	30		27 (19)
C	25	47 %	25		27 (19)
D	20	21 %	20		27 (19)
Water-to-air air conditioners
Rating point	T_j (°C)	Part load ratio	Cooling tower or water loop application inlet/outlet temperatures (°C)	Ground coupled application (water or brine) inlet/outlet temperatures (°C)	Indoor air dry bulb (wet bulb) temperatures (°C)
A	35	100 %	30/35	10/15	27 (19)
B	30	74 %	26/^f3	10/	27 (19)
C	25	47 %	22/	10/	27 (19)
D	20	21 %	18/	10/	27 (19)
Air-to-water comfort chillers
Rating point	T_j (°C)	Part load ratio	Outdoor air dry bulb temperatures (°C)		Fan coil application inlet/outlet water temperatures (°C)		Cooling floor application inlet/outlet water temperatures (°C)
Rating point	T_j (°C)	Part load ratio	Outdoor air dry bulb temperatures (°C)		Fixed outlet	Variable outlet
A	35	100 %	35		12/7	12/7	23/18
B	30	74 %	30		/7	/8,5	/18
C	25	47 %	25		/7	/10	/18
D	20	21 %	20		/7	/11,5	/18
Water-to-water comfort chillers
Rating point	T_j (°C)	Part load ratio	Cooling tower or water loop application inlet/outlet temperatures (°C)	Ground coupled application (water or brine) inlet/outlet temperatures (°C)	Fan coil application inlet/outlet water temperatures (°C)		Cooling floor application inlet/outlet water temperatures (°C)
Rating point	T_j (°C)	Part load ratio			Fixed outlet	Variable outlet
A	35	100 %	30/35	10/15	12/7	12/7	23/18
B	30	74 %	26/	10/	/7	/8,5	/18
C	25	47 %	22/	10/	/7	/10	/18
D	20	21 %	18/	10/	/7	/11,5	/18
Air-to-air heat pumps
Rating point	T_j (°C)	Part load ratio	Outdoor air dry bulb (wet bulb) temperatures (°C)		Indoor air dry bulb temperature (°C)
A	– 7	88 %	– 7(– 8)		20
B	+ 2	54 %	+ 2(+ 1)		20
C	+ 7	35 %	+ 7(+ 6)		20
D	+ 12	15 %	+ 12(+ 11)		20
E	T_ol	depends on T_ol	T_j = T_ol		20
F	T_biv	depends on T_biv	T_j = T_biv		20
Water/brine-to-air heat pumps
Rating point	T_j (°C)	Part load ratio	Ground Water	Brine	Indoor air dry bulb temperature (°C)
Rating point	T_j (°C)	Part load ratio	Inlet/outlet temperatures (°C)	Inlet/outlet temperatures (°C)	Indoor air dry bulb temperature (°C)
A	– 7	88 %	10/	0/	20
B	+ 2	54 %	10/	0/	20
C	+ 7	35 %	10/	0/	20
D	+ 12	15 %	10/	0/	20
E	T_ol	depends on T_ol	10/	0/	20
F	T_biv	depends on T_biv	10/	0/	20

Table 22

Part load conditions for SEPR calculation for air-cooled high temperature process chillers

Rating point	Part load ratio of high temperature process chillers	Part load ratio (%)	Outdoor side heat exchanger	Indoor side heat exchanger
With the water flow rate determined during ‘A’ test for units with a fixed water flow rate or with a variable flow rate.
			Inlet air temperature (°C)	Evaporator inlet/outlet water temperatures (°C)
			Inlet air temperature (°C)	Fixed outlet
A	80 % + 20 % × (T_A -T_D )/(T_A -T_D )	100	35	12/7
B	80 % + 20 % × (T_B -T_D )/(T_A -T_D )	93	25	^f4/7
C	80 % + 20 % × (T_C -T_D )/(T_A -T_D )	87	15	/7
D	80 % + 20 % × (T_D -T_D )/(T_A -T_D )	80	5	/7

Table 23

Part load conditions for SEPR calculation for water-cooled high temperature process chillers

Rating point	Part load ratio of high temperature process chillers	Part load ratio (%)	Water-cooled condenser		Indoor side heat exchanger
With the water flow rate determined during ‘A’ test for units with a fixed water flow rate or with a variable flow rate.
			Inlet/outlet water temperatures (°C)	Outdoor air temperature (°C)	Evaporator Inlet/outlet water temperatures (°C)
			Inlet/outlet water temperatures (°C)	Outdoor air temperature (°C)	Fixed outlet
A	80 % + 20 % × (T_A -T_D )/(T_A -T_D )	100	30/35	35	12/7
B	80 % + 20 % × (T _B-T _D)/(T _A-T _D)	93	23/^f5	25	/7
C	80 % + 20 % × (T _C-T _D)/(T _A-T _D)	87	16/	15	/7
D	80 % + 20 % × (T_D-T_D)/(T_A-T_D)	80	9/	5	/7

Table 24

Reference design conditions for comfort chillers, air conditioners and heat pumps

Function	Season	Reference design temperature dry bulb (wet bulb)
Function	Season	T_design,c
Cooling	Average	35 (24) °C
		Reference design temperature	Bivalent temperature maximum	Operation limit temperature maximum
		T_design,h	T_biv	T_ol
Heating	Average	– 10 (– 11) °C	+ 2 °C	– 7 °C
	Warmer	2 (– 1) °C	7 °C	2 °C
	Colder	– 22 (– 23) °C	– 7 °C	– 15 °C

Table 25

Standard rating conditions for fan coil units

Cooling test	Heating test	Sound power test
Air temperature	27 °C (dry bulb) 19 °C (wet bulb)	Air temperature	20 °C (dry bulb)	At ambient conditions without water flow
Inlet water temperature	7 °C	Inlet water temperature	45 °C for 2-pipe units 65 °C for 4-pipe units
Water temperature rise	5 °C	Water temperature decrease	5 °C for 2-pipe units 10 °C for 4-pipe units

Cooling test

Heating test

Sound power test

Air temperature

27 °C (dry bulb)

19 °C (wet bulb)

Air temperature

20 °C (dry bulb)

At ambient conditions without water flow

Inlet water temperature

7 °C

Inlet water temperature

45 °C for 2-pipe units

65 °C for 4-pipe units

Water temperature rise

5 °C

Water temperature decrease

5 °C for 2-pipe units

10 °C for 4-pipe units

Table 26

European heating seasons for heat pumps

bin_j	T_j (°C)	H_j (h/annum)
bin_j	T_j (°C)	Warmer	Average	Colder
1 to 8	– 30 to – 23	0	0	0
9	– 22	0	0	1
10	– 21	0	0	6
11	– 20	0	0	13
12	– 19	0	0	17
13	– 18	0	0	19
14	– 17	0	0	26
15	– 16	0	0	39
16	– 15	0	0	41
17	– 14	0	0	35
18	– 13	0	0	52
19	– 12	0	0	37
20	– 11	0	0	41
21	– 10	0	1	43
22	– 9	0	25	54
23	– 8	0	23	90
24	– 7	0	24	125
25	– 6	0	27	169
26	– 5	0	68	195
27	– 4	0	91	278
28	– 3	0	89	306
29	– 2	0	165	454
30	– 1	0	173	385
31	0	0	240	490
32	1	0	280	533
33	2	3	320	380
34	3	22	357	228
35	4	63	356	261
36	5	63	303	279
37	6	175	330	229
38	7	162	326	269
39	8	259	348	233
40	9	360	335	230
41	10	428	315	243
42	11	430	215	191
43	12	503	169	146
44	13	444	151	150
45	14	384	105	97
46	15	294	74	61
Total hours:		3 590	4 910	6 446

Table 27

European cooling season for comfort chillers and air conditioners

Bins	Outdoor temperature (dry bulb)	‘Average cooling season’	EER calculation
Bins	Outdoor temperature (dry bulb)	bin hours
j	T_j	h_j
#	°C	h/annum
1	17	205	EER(D)
2	18	227	EER(D)
3	19	225	EER(D)
4	20	225	D — Measured value
5	21	216	Linear interpolation
6	22	215	Linear interpolation
7	23	218	Linear interpolation
8	24	197	Linear interpolation
9	25	178	C — Measured value
10	26	158	Linear interpolation
11	27	137	Linear interpolation
12	28	109	Linear interpolation
13	29	88	Linear interpolation
14	30	63	B — Measured value
15	31	39	Linear interpolation
16	32	31	Linear interpolation
17	33	24	Linear interpolation
18	34	17	Linear interpolation
19	35	13	A — Measured value
20	36	9	EER(A)
21	37	4	EER(A)
22	38	3	EER(A)
23	39	1	EER(A)
24	40	0	EER(A)

Table 28

European reference refrigeration season for high temperature process chillers

bin_j	T_j (°C)	H_j (h/annum)
1	– 19	0,08
2	– 18	0,41
3	– 17	0,65
4	– 16	1,05
5	– 15	1,74
6	– 14	2,98
7	– 13	3,79
8	– 12	5,69
9	– 11	8,94
10	– 10	11,81
11	– 9	17,29
12	– 8	20,02
13	– 7	28,73
14	– 6	39,71
15	– 5	56,61
16	– 4	76,36
17	– 3	106,07
18	– 2	153,22
19	– 1	203,41
20	0	247,98
21	1	282,01
22	2	275,91
23	3	300,61
24	4	310,77
25	5	336,48
26	6	350,48
27	7	363,49
28	8	368,91
29	9	371,63
30	10	377,32
31	11	376,53
32	12	386,42
33	13	389,84
34	14	384,45
35	15	370,45
36	16	344,96
37	17	328,02
38	18	305,36
39	19	261,87
40	20	223,90
41	21	196,31
42	22	163,04
43	23	141,78
44	24	121,93
45	25	104,46
46	26	85,77
47	27	71,54
48	28	56,57
49	29	43,35
50	30	31,02
51	31	20,21
52	32	11,85
53	33	8,17
54	34	3,83
55	35	2,09
56	36	1,21
57	37	0,52
58	38	0,40

Table 29

Operational hours per functional mode for comfort chillers, air conditioners and heat pumps

Season		Operational hours
		On-mode	Thermostat Off mode	Standby mode	Off mode	Crankcase heater mode
		H_CE (cooling); H_HE (heating)	H_TO	H_SB	H_OFF	H_CK
Cooling (to calculate SEER)	Average	600	659	1 377	0	2 036
	Colder	300	436	828	0	1 264
	Warmer	900	767	1 647	0	2 414
Heating only (to calculate SCOP)	Average	1 400	179	0	3 672	3 851
	Colder	2 100	131	0	2 189	2 320
	Warmer	1 400	755	0	4 345	5 100
Heating, if reversible (to calculate SCOP)	Average	1 400	179	0	0	179
	Colder	2 100	131	0	0	131
	Warmer	1 400	755	0	0	755

Annotations

Footnotes

f1: The wet bulb temperature condition is not required when testing units which do not evaporate condensate.
f2: For units designed for heating and cooling mode, the flow rate obtained during the test at standard rating conditions in cooling mode is used.
f3: Outlet temperatures dependent on water flow rate as determined at standard rating conditions (100 % part load ratio when cooling, 88 % when heating)
f4: With the water flow rate determined during ‘A’ test for units with a fixed water flow rate or with a variable flow rate.
f5: With the water flow rate determined during ‘A’ test for units with a fixed water flow rate or with a variable flow rate.