How accurate is the energy saving rate

[JesseFrank]

I purchased a energy monitoring meter, as I had suspicions that my 8 year old side by side fridge uses too much electricity.

My Lg side by side is 19 cubic and of course not yet from the inverter type and uses 2.73kWh in 24 hours which is 996 kWh per year.

Now I went to HP to have a look at the new inverter sided by side fridges, and the energy rating sticker for a 19 cubic shows rates around 520 kWh per year, so mine uses almost double.

The question is of course how is that rating measured, because a freezer/fridge that is completely loaded and no door is ever opened will use significantly less power than a day by day use.

So any idea how accurate the rating on the sticker is in real life ?

[IMHO]

The energy star tests are conducted under controlled conditions, so much like fuel economy tests they are directly comparable to each other, but not necessarily achievable in the real-world.

Differences in ambient temperature, airflow around the fridge, loading and how often and long the door is opened will all have an effect on actual energy usage.

That said, the general rule of thumb is that refrigeration systems (fridges, freezers and AC's) lose around 3-5% efficiency every year, so even just a new version of your existing fridge would use less energy.

Also, the number of stars given out is revised every 1-2 years, so something that was 5 stars a few years back might now only be 3 stars now under the current rules - but you're doing the right thing though and looking at actual kWh consumption

[JesseFrank]

So if a fridge shows 520 kWh rating on the sticker, what would be the real life figure ?

Is 996 kWh a year an extremely high figure for a 19 qubic side by side or is that acceptable.

[IMHO]

So if a fridge shows 520 kWh rating on the sticker, what would be the real life figure ?

Is 996 kWh a year an extremely high figure for a 19 qubic side by side or is that acceptable.

Real life figure if it's brand new, in a room with the same ambient temperature as the efficiency test, the same load on board as the test, and the door opened only for the same amount of time as the test procedure

I don't have the actual test procedure on hand - but bottom line is, it should be close to actual so long as you don't have an overly hot room, don't leave the door open, and aren't switching out the load too often.

996kWh/yr equates to around 380 Baht/mth at domestic rates - yes, that's very expensive.

Edited May 14, 2014 by IMHO

[Issangeorge]

JesseFrank, where did you purchase your Energy Monitoring Metre, and how much was it?

Sent from my i-mobile IQ 6 using Thaivisa Connect Thailand mobile app

[JesseFrank]

JesseFrank, where did you purchase your Energy Monitoring Metre, and how much was it?

Sent from my i-mobile IQ 6 using Thaivisa Connect Thailand mobile app

I bought this one

http://www.ebay.ca/itm/LCD-DISPLAY-DIGITAL-ENERGY-MONITORING-POWER-METER-WATT-HOUR-OUTLET-EU-US-/310585085041?ssPageName=ADME:L:OU:BE:3160

There are cheaper versions which plug straight in the socket, but this quite inconvenient when behind a fridge, and they accept either EU or US plugs, while this one accepts all kind of plugs.

I also looked up on Google, and the Debuy brand seems to use decent components.

Arrived in Thailand 13 days after order with no "extra" costs.

[h90]

The energy star tests are conducted under controlled conditions, so much like fuel economy tests they are directly comparable to each other, but not necessarily achievable in the real-world.

Differences in ambient temperature, airflow around the fridge, loading and how often and long the door is opened will all have an effect on actual energy usage.

That said, the general rule of thumb is that refrigeration systems (fridges, freezers and AC's) lose around 3-5% efficiency every year, so even just a new version of your existing fridge would use less energy.

Also, the number of stars given out is revised every 1-2 years, so something that was 5 stars a few years back might now only be 3 stars now under the current rules - but you're doing the right thing though and looking at actual kWh consumption

Just thinking:

In our kitchen it gets April-May above 40 degree. So measuring the fridge this time of the year surely gives higher numbers.

Also you can adjust the temperature inside. I guess it makes a big difference if it is set to min or to max.

Or short version: I think measuring how much electric it needs and compare it with the numbers on the sticker of a new one has a high margin or error.

[Pib]

JesseFrank, where did you purchase your Energy Monitoring Metre, and how much was it?

Sent from my i-mobile IQ 6 using Thaivisa Connect Thailand mobile app

I bought this one

http://www.ebay.ca/itm/LCD-DISPLAY-DIGITAL-ENERGY-MONITORING-POWER-METER-WATT-HOUR-OUTLET-EU-US-/310585085041?ssPageName=ADME:L:OU:BE:3160

There are cheaper versions which plug straight in the socket, but this quite inconvenient when behind a fridge, and they accept either EU or US plugs, while this one accepts all kind of plugs.

I also looked up on Google, and the Debuy brand seems to use decent components.

Arrived in Thailand 13 days after order with no "extra" costs.

You can buy energy meters here in Thailand like the Electan ET-MP01U for around Bt800...nice item...can answer a lot of your energy use questions...sold at places like HomePro, Lotus, etc. Go to this Post for more info.