The Radiators With Brains

Transcription

1 Electrical Storage Radiators of the NEXT Generation Based on established German Technology..fine tuned By Cornish Engineering The Radiators With Brains Report of independent efficiency and electricity usage tests carried out in Nov by Advantica Ltd - a UKAS Accredited Independent Laboratory * * Advantica Ltd changed its name on to GL industrial Services UK Ltd

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3 500W, 800W, 1kW and 1.2kW Electric storage radiators fitted with Teddington Intelligent thermostats Test Sample Designation Description of Test Sample Sample No. Description of Sample 6084, 6088 & kW Domestic Radiator W Domestic Radiator kW Domestic Radiator kW Domestic Radiator The products tested were 500W, 800W, 1kW and 1.2kW versions of the Ecowarmth electric storage radiators. The appliances can be floor standing or wall mounted. The appliances utilise a built in Teddington Intelligent Thermostat exclusive to Ecowarmth (Advantica Certificate number TR/06/037), which is an electronic control thermostat providing regulation of the appliance heat output in response to room temperature - which is monitored via an incorporated sensor - and also the user selected comfort level which is set using a knob on the side of the appliance. 1.2kW unit 500W unit Test Plan The following settings were applied for a three day period: Friday 07/11/08 at 08:00 through Saturday 08/11/08 & Sunday 09/11/08 to Monday 10/11/08 at 08:00 : Location Setting Average room temperature over 72 hours Living Room setting ºC Hallway setting ºC Bedroom 1 setting ºC Bedroom 2 setting ºC Landing setting ºC Kitchen No radiator 18.5ºC Bathroom No radiator 20.0ºC Note: kwh readings were recorded for the duration of the tests for all the units along with surface temperatures. The cooker was run for one hour between 16:00 and 17:00 on weekdays, the TVs in the front room and in bedroom 2 were on between 12:00 and 17:00; these appliances were turned on for these periods in order to simulate a normal household. The window in bedroom 2 was deliberately left open during the test as a significant Heat Loss Factor and the front door faces North and has no porch which introduces a further Heat Loss Factor. Advantica Limited Page: 2 of 9 ref: 02/08/2.1 GEN2

4 500W, 800W, 1kW and 1.2kW Electric storage radiators fitted with Teddington Intelligent thermostats External Views of test house Front (North facing) Front external temperature location LHS (as viewed from the front East facing) Rear external temperature sensor location The house is a two bedroom, two story detached house using timber frame technology with a brick facing incorporating double glazed windows and doors throughout. External walls consist of timber frame wall panels of 150mm of mineral wool insulation sandwiched between 15mm sheeting. There is a 50mm air gap before the outer brick facing. Rear ( south facing) All windows and rear patio doors are U-PVC framed sealed double glazed units The ground floor is a suspended timber floor fitted with 200mm of supported mineral wool insulation finished with 22mm of flooring grade chipboard. The roof consists of 35º trusses at 600mm centres with reinforced roofing felt and tiles. The roof space has 200mm of mineral wool insulation laid between the joists. The house can be considered as having average levels of insulation and was specifically built to represent an average dwelling for test purposes. Insulation properties: U Value (W/m 2 K) External walls Windows 3.00 Front door 1.20 Patio doors 3.00 Ground floor Roof Advantica Limited Page: 3 of 9 ref: 02/08/2.1 GEN2

5 500W, 800W, 1kW and 1.2kW Electric storage radiators fitted with Teddington Intelligent thermostats Floor plan layout of the test house. Room Dimensions Ground floor (mm) (feet) First floor (mm) (feet) Kitchen 2425 x ft 1in x 8ft 2in Bedroom x ft 0in x 7ft 7in Lounge / Dining 4573 x ft 0in x 13ft 3in Bedroom x ft 0in x 8ft 9in WC 911 x ft 0in x 4ft 1in Bathroom 2620 x ft 7in x 5ft 1in Bedroom 2 Bedroom 1 Key: 500W Radiator 800W Radiator 1kW Radiator 1.2kW Radiator Note: all internal temperature sensors were placed at approximately mid-room height in the locations shown in the diagram above. External temperature sensors were placed in the locations shown at approximately 2m from ground height in locations which were not subject to direct sunlight. Temperature sensor Advantica Limited Page: 4 of 9 ref: 02/08/2.1 GEN2

6 500W, 800W, 1kW and 1.2kW Electric storage radiators fitted with Teddington Intelligent thermostats Results summary Total kw/h used / 72hr Average kw/h / 24hr 1.2kW Front room radiator kW front room radiator kW hall radiator kW landing radiator Bedroom 1 1kW radiator Bedroom 2 1kW radiator* Total household power consumption (All radiators) * Note: It can be seen that Bedroom 2 with its window deliberately left open used considerably more electricity than similar sized Bedroom 1 with its window closed. It is estimated that Bedroom 2 would have used approx kw per 24 hrs if the window had been kept shut. Outside temperatures (ºC) Date Max outside Temp (back) Min outside temp (back) Max outside temp (front) Min outside temp (front) 7 th -8 th November th -9 th November th -10 th November Summary With the window in Bedroom 2 open for the whole test, the total electricity used in an average 24 hour period (30.85 kwh) represents 23.37% of the total maximum kwh (5.5 kw x 24 Hr = 132 kwh) which would have been used if the radiators had been using electricity continuously for the whole period. This in turn represents an average of minutes of electricity used per hour to generate sufficient warmth to heat the rooms to the temperatures measured. After adjustment of the usage in Bedroom 2 to allow for a slightly large floor area (10.82 m 2 vs m 2 for Bedroom 1), the average usage for Bedroom 2 with the window closed can be calculated to be approximately 1.78 kwh for a similar 24 hour period. Using this figure to provide a revised total usage of electricity (26.1 kwh) represents 19.77% of the total maximum possible usage of 132 kwh over the 24 hours. This in turn represents a calculated average of minutes of electricity used per hour to generate sufficient warmth to heat the rooms to the temperatures measured. Test work was carried out by Advantica Certification Services which is a UKAS accredited laboratory under ISO17025:2005 (General requirements for the competence of testing and certification laboratories) & EN45011:1998 (General requirements for bodies operating product certification systems). The measurements made were taken using test methods similar to those used in BS EN :2002 clause 10 (input power measurements) and Clause 11 (surface temperature measurements). However, the overall test method used on this occasion is not UKAS accredited. Advantica Limited Page: 5 of 9 ref: 02/08/2.1 GEN2

7 500W, 800W 1kW and 1.2kW Electric storage radiators fitted with Teddington Intelligent Thermostats Internal room temperatures (Readings taken from the 07/11/08 to the 10/11/08). Ground floor temperatures Advantica Limited Page: 6 of 9 ref: 02/08/2.1 GEN2

8 500W, 800W 1kW and 1.2kW Electric storage radiators fitted with Teddington Intelligent Thermostats Lounge temp Thermal images of the radiators under test. Readings taken on the 07/11/08 Bedroom 1 Bedroom 2 Advantica Limited Page: 7 of 9 ref: 02/08/2.1 GEN2

9 500W, 800W 1kW and 1.2kW Electric storage radiators fitted with Teddington Intelligent Thermostats First floor temperatures Advantica Limited Page: 8 of 9 ref: 02/08/2.1 GEN2

10 500W, 800W 1kW and 1.2kW Electric storage radiators fitted with Teddington Intelligent Thermostats Outside air temperatures (Reading taken on the 07/11/08 to the 10/11/08). Advantica Limited Page: 9 of 9 ref: 02/08/2.1 GEN2