Electricity Saving Tips For Homes And Offices

Refrigerators with Inverter technology can help save electricity

By on May 3, 2015

Are you planning to buy a refrigerator and looking for energy saving options? If upfront cost for buying is not a concern for you then do look at refrigerators with inverter technology. Rest assured that the extra money you pay upfront will be recovered in the form of electricity savings. Inverter technology that was developed in Japan is the most efficient refrigeration technology available in the market today that can save up to 30-50% electricity consumed (units consumed) compared to regular refrigerators available.

Refrigerator Inverter

How does a refrigerator work?

Whenever it is hot and we want to feel cooler, if we take a bath, we suddenly start feeling better. The moisture (or water) on our body evaporates by taking heat from our body and makes us feel cooler. Similarly in a refrigerator there is a refrigerant called HFC (Hydro Floro Carbon) that moves in the pipes or coils on the rear part of the refrigerator. When it is in a liquid form, it takes the heat from the refrigerator contents and evaporates to form gas there by cooling the things kept in the refrigerator. The gas is then compressed using a compressor to convert it into liquid again, and the cycle continues. The compressor uses electricity to do its job and is the most electricity consuming part of a refrigerator.

Refrigerator also has a device called “Thermocouple” which senses the temperature inside the refrigerator and makes the compressor go “on” or “off”. The thermocouple works as per the temperature set in the refrigerator (yes you can set temperature in a refrigerator as well and we will explain it more in our other articles on refrigerators).

How does a compressor in regular refrigerator work?

Most compressors in regular refrigerators are single speed refrigerators. They are either “on” or “off” based on the temperature in the refrigerator and the setting in the thermocouple. Most compressors are designed to handle peak load conditions (for high temperatures in summers), which means that they run at peak load even in winters when the cooling requirement is less. Every time the refrigerator door is opened, heat enters the refrigerator and the compressor has to take care of this load as well. So most regular compressors are built to take care of peak load plus the “door open shut” load which during most of the year is much more than the actual requirement.

How does a compressor with inverter technology work?

A compressor with inverter technology works very much like a car accelerator. When the speed required is more, the acceleration is more, and when it is less, and then the acceleration is less. This makes sure that during summer months when cooling load is more, the compressor works at peak capacity taking more electricity. But during winter months when cooling load is less, the compressor works less there by consuming less electricity. Even in summer month, the night temperature is less than the day temperature and thus electricity savings happen in night when compressor can run at a lesser speed.

This kind of compressor never switches off even when the temperature stabilizes, but runs at a slower speed maintaining the temperature inside the refrigerator. The benefits are:

  • In an “on” “off” cycle of a regular refrigerator, inside temperature varies throughout. But in case of inverter technology, temperature is more stable.
  • The amount of noise made by the refrigerator is much less in refrigerators with inverter technology as compared to the regular ones.
  • Energy or electricity consumption is much less when the temperature stabilizes.

InverterTechnology

Although prices of inverter technology refrigerators are on a higher side, but they can save a good amount of electricity, there by helping you recover the money in your electricity bills.Infographic18

Lesser known benefits of Inverter Technology

  • Regular motors need 3-4 times more current (more than running current) at startup. So the inverter/generator size needed to run any AC or Refrigerator increases significantly. But Inverter Technology air conditioners and refrigerators have variable speed motors that start up gradually needing much lesser current at startup. Thus the size of inverter/generator required to startup is less. For e.g. A 1.5 ton fixed speed AC that runs at about 10 Amp current may need up to 30 Amp current at startup and thus a 5 kVA inverter/generator. But an inverter technology Air Conditioner needs about 6-7 Amp current and not much more at startup and thus a 1.5 kVA or 2 kVA inverter/generator is good enough to support it.
  • Regular motors have much lower power factor. In commercial and industrial connections there is penalty for low power factor and rebates for higher power factor. An inverter technology motor will have power factor close to unity (or 1) which not only results in lesser electricity consumption but also help get rebates on better power factor.
  • If you are planning to use Solar PV for air conditioner, then it is the best to use inverter technology air conditioner or refrigerator as it not only reduces the size of PV panels because it consumes lesser electricity, it also reduces the size of inverter to be put along with the PV panel.

Here is a short video for tips to buy the best refrigerator in India

Source of Information:

http://www.panasonic.com/industrial/includes/pdf/invertercompressors-improvingefficiency.pdf

http://www.energyquest.ca.gov/how_it_works/refrigerator.html



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171 Comments on "Refrigerators with Inverter technology can help save electricity"

If you have any question or comment, please leave a message here. We try to reply to questions in the sequence they come in. We work from Monday-Friday 10AM-7PM. If we know the answer we try to reply to the question within 3 days.

Guest
Mahua Dasgupta
Today 12:48 am

We are comparing between a Samsung 320l and a Haier 320l. Both use DC inverter technology. Samsung is top mounted and Haiee is bottom mounted. Does a top mounted refg save more energy? If so, why?

Guest
Shaheen Farooqui
May 26, 2015

I have purchased an LG refrigerator model number GL318PNG4 double door.
I have observed frost and moisture formation in vegetable crisper.
What could be the possible reason and please suggest a remedy.

Guest
rachit kr singh
May 25, 2015

In my village no electricity supply so i already have 300 watt solar pv fixed with 150 Ah tubular battery with 600va luminous lectric inverter fixed, now my question is can i run small fridge of 80Liters OR 47 Liters made of electrolux (Regular fridge)along with 3nos of 15 watt cfl one lcd tv 32 inch and one 200 watt cooller,if no how much more kva of inverter is needed or how much pv panel to be extend with how much AH of battery
iam with tight budget so looking for cheap power saving fridge with in 10 thousand which simply cools water or some ice..can you suggest how much power dose consume such 80 liter or 47 liter fridge bcoz no shopkeeper able to tell me.
(Electrolux EC060PSH 47 L Single Door Refrigerator)
(Electrolux EC090P 80 L Single Door Refrigerator)

Guest
Binu
May 22, 2015

According to you an inverter refrigerators compressor never switches off, I have a LG inverter refrigerator GL-A282SPZL and I noticed that its compressor does switch off and freezer fan also off that time.What is the reason?. In many inverter ac adds claims power saving up to 65%, but doesn’t mention how much saving compared to 5star rated AC’s.What is the actual powe. saving comared to 5star rated AC.

Thanks
Waiting for your reply

Guest
Binu
May 25, 2015

Hi, Thank you for your reply.Since you have said it can be problem of refrigerator, I desided to monitor it for few hours and these are my findings.
Freezer temperature setting @no.3 position and refrigerator @ no.7.
Compressor off =10 min
Compressor on =35 min
off=13 min
On=30 min
Off=15 min
On=02 min
Off=33 min
On=14 min
Off=22 min

All these times refrigerator never opened, and finally i opened
the refrigerator and check the cooling and found its proper and
then opened the freezer and poured water into ice tray closed the door
and checked the compressor run time and found it was on
continuously on for 1+ hours.So is it problem or normal thing?

Guest
Dhruv Arya
May 16, 2015

I have zeroed in on Panasonic NR-Bw465XS (450 Ltr.) for style and simplicity in tray allocation. This is with inverter technology bottom freezer.
1) Any reviews on this model.
2) Any disadvantage of bottom freezer?
3) And any comparisions with Bosch KGN57AI50I. Which one is a better buy?

Guest
May 16, 2015

But why it is called “inverter technology”is the refrigerator consuming power from AC after converting from DC FROM BATTERY

Guest
Sunil Dhawan
May 13, 2015

Which 3 door fridge brand of 450-500L would be the best choice please?

Guest
Sahasra
May 12, 2015

Hi,

We’re planning to buy a refrigerator around 360 Litres capacity.Can you please suggest which among LG 360 L(GL-D402RLJM ) and Samsung Digital Inverter 345L(36JSRZESP) would be best buy.Also among LG 360 L models-Is there any difference between GL-D402RLJM And GL-402JHSL,Which will be better among these two LG models.

Thanks in advance

Guest
Saksham
May 11, 2015

I am thinking to buy LG GL-D322JGFL. Is it a good choice?

Guest
Saksham
May 13, 2015

I bought it today but it’s been almost 5 hours of it after installed,the outer body is hot when touched ,not warm but hot.Why is it so?Is there some fault?

Guest
Sanam
May 10, 2015

What is your view on samsung smart convertible refrigerator?

 
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