Energy efficiency measurement “ηwh” and annual

Energy efficiency measurement “ηwh” and annual
srl
Gas Appliances Engineering & Consulting
BRESCELLO 20/05/16
PROJECT NR. 16223
REPORT N° 423-16
Revision 00
Carbon Fiber Heating srl
Calea Borsului, 53B
410605 Oradea
In attention of Mr. Gino Tonello,
Energy efficiency measurement “ηwh” and annual power consumption AEC of
Electrical water heater WA-BO Model NTA_75LT
Content
1. Introduction............................................................................................................................. 2
2. Water heater features ............................................................................................................. 2
3. Instrument used for testing...................................................................................................... 3
4. Measurements.......................................................................................................................... 3
5. Conclusions ............................................................................................................................ 7
6. Attachments............................................................................................................................. 7
6.1. Withdrawal profiles see EN50440 ...................................................................................... 8
6.2. Chart 1155.01 – Consumed and produced energy during withdrawal period– Step 4 – Profile
“M”.............................................................................................................................................. 9
6.3. Chart 1155.03 – Stabilisation (Step 3) ............................................................................... 10
6.4. Chart 1155.04 – Consumed energy during maintenance period – Step 4 – Profile “M”… 11
GAS POINT srl
Via Alfieri, 1 - Sorbolo Levante - 42041 BRESCELLO (RE) - Italy
P.IVA 02043140355
Tel +39 0522 680563 - Fax +39 0522 480140 - e.mail info@gaspointonline.it
1. Introduction
The purposes of this activity were:
• The measurement of energetic efficiency
ηwh of the water heater (according to:
239/13 ErP Regulation, prEN50440/13)
• Annual electric consumption AEC
calculation (according to the 239/13 ErP
Regulation, prEN50440/13).
• Establishing the energy class of the water
heater (according to the 239/13 ErP
Regulation).
2. Water heater features
The tested water heater model is NTA-75 l,
presented
in
the
picture
below;
Code:
NTA1.B.C00.2A2
The water heater was tested with continuous
power supply (NON Off-Peack);
The water heater is not equipped with function
of auto-adaptation to the user conditions of use (NON
Smart Control).
The water heater was tested by adjusting the
device’s thermostats during test cycle, according to the
reference standard prEN50404 which states:
"If the product requires manual thermostat operation to
obtain the temperatures in Table 4, this shall be done
during the test“.
3. Instruments used for testing
Description
No. Matr.
Gas point
Brand
Model
No. Matr.
Constr.
Measure
Network analysis
APA001-01
HIOKI
3169/21
150206091
Thermometer
chain, T probe
Thermometer
chain, T probe
Transducer
mass flow rate
Thermometer
chain Pt100
CTE005-01
LSI
-
-
CTE005-02
LSI
-
-
TDP001-01
MICRO
MOTION
EP
F025S116CC
ANIZZZZ
TR103
14001420/06
Energy, electric
power consumed
Entry water
temperature
Exit water
temperature
Water flow
CTE003-01
408571
Ambiance
temperature
GAS POINT srl Via Alfieri, 1 - Sorbolo Levante - 42041 BRESCELLO (RE) - Italy
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4. Measurements
The water heater was tested according to the withdrawal profile „M” presented in the
attachment.
As mentioned before at point 2, the setpoint of the water heater had been adjusted initially at
45°C.
Subsequently it was set at 60°C an hour and a half before the withdrawals of 12.45h (5.45 hours
after beginning step 4) and of 20.30h (13,3 hours after beginning step 4); withdrawals providing
minimal temperatures of the output sanitary water at 55°C. After those two withdrawals
mentioned before were finished, the setpoint was brought back to 45°C.
The water heater was submitted to test cycle illustrated in the following scheme, extracted from
the reference normative, regarding the steps 1-2-3-4.
The attached chart 1158.01 shows the parameter progress requested by the normative for energy
efficiency calculation, measured during the step 4 withdrawal period; that means starting with
the first withdrawal at 7.00h until the last withdrawal at 21.45h.
The attached chart 1158.04 shows the parameter progress requested by the normative for energy
efficiency calculation, measured during the period without withdrawals of the step 4; that means
starting from the end of the last withdrawal at 21.45h until the expiration of 24 hours requested
by the normative starting from the first withdrawal at 7.00 o’clock of the previous day.
Finally, the chart 1158.03 attached, shows the significant parameters progress during approx. 12
hours of the stabilisation period of the step 3 which comes before the sequence of withdrawals
(where it can be observed that during each 65 minutes there are short heating periods through the
electrical resistance of approx. 500 W used for temperature maintaining of the water heater).
The following charts indicate:
• Energy and temperature parameters measured during the tests (highlighted in yellow);
• The parameters inserted according to the water heater features (highlighted in blue);
• Obtained results according to the calculation methods provided by the normative
(highlighted in green).
GAS POINT srl Via Alfieri, 1 - Sorbolo Levante - 42041 BRESCELLO (RE) - Italy
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GAS POINT srl Via Alfieri, 1 - Sorbolo Levante - 42041 BRESCELLO (RE) - Italy
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GAS POINT srl Via Alfieri, 1 - Sorbolo Levante - 42041 BRESCELLO (RE) - Italy
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5. Conclusions
Electrical water heater model NTA_75LT has the following features and performances, to be
inserted in the energetic label.
At your disposal,
Claudio Zatti
GAS POINT srl Via Alfieri, 1 - Sorbolo Levante - 42041 BRESCELLO (RE) - Italy
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6. Attachments
GAS POINT srl Via Alfieri, 1 - Sorbolo Levante - 42041 BRESCELLO (RE) - Italy
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6.1 prEN50440 Withdrawal profiles
GAS POINT srl Via Alfieri, 1 - Sorbolo Levante - 42041 BRESCELLO (RE) - Italy
-8-
6.2 Chart 1158.01: Consumed and Produced Energy During the Withdrawal Periods – Step
4 – „M” profile.
GAS POINT srl Via Alfieri, 1 - Sorbolo Levante - 42041 BRESCELLO (RE) - Italy
-9-
6.3 Chart 1158.03 – Stabilisation (Step 3)
GAS POINT srl Via Alfieri, 1 - Sorbolo Levante - 42041 BRESCELLO (RE) - Italy
- 10 -
6.4 Chart 1158.04 – Consumed Energy During Maintenance Period – step 4 – „M” profile
GAS POINT srl Via Alfieri, 1 - Sorbolo Levante - 42041 BRESCELLO (RE) - Italy
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