Electricity Saving Tips For Homes And Offices

Refrigerators with Inverter technology can help save electricity

By on March 6, 2014

Refrigerator Inverter 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.

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 nigh 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

Source of Information:

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

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

Have question, doubt or comment? Leave a message

There Are 25 Comments

  1. jagat says:

    Hi Abhishek,

    I have a doubt regarding inverter technology.. if an inverter ac cools the room to desired temprature while working at its minimum capacity and if temp drops further then will its compressor turn off for some time as a normal ac?? actually i see many time the fan of my 2ton Mitsubishi ac outdoor unit turns off and then on even the daikin 1,5ton ac in other room does the same. If this happens does it have any bad effect on the life of compressor???

    • Abhishek says:

      Hi Jagat,

      Inverter ACs are designed in such a way that the compressor never turns off. Firstly let me tell you that even if the thermostat senses that the optimum temperature has reached, the flow of heat into the room does not stop. If your room is cooler than the outside temperature, the heat will flow into the room continuously. It does not stop even for a moment. What the inverter AC does is that it optimizes the speed of the compressor in such a way that the rate of heat it takes out from the room is same as the rate of heat coming into the room. So initially it does run at a higher speed (to reduce the temperature), but it stabilizes at a consistent speed once the rate at which it is taking out heat is equal to rate at which heat is coming in.

      Thus it is also said that inverter ac is much more consistent in maintaining temperature, as the temperature will never go down from what you have set on thermostat. Whereas in a fixed speed AC the temperature may go down about a degree centigrade more when it stops.

      Hope this helps.

      Regards,
      Abhishek

      P.S: Please help us by taking survey on this link: http://www.sustain-it-india.com/index.php?r=survey/index&sid=687551&lang=en

  2. Murali says:

    Which is best Inverter Technology Fridge available in 200-300L Range ?

    • Abhishek says:

      Hi Murali,

      Below are the most efficient AC models in 200-300 L range as per BEE data. Most of them are inverter tech models:

      S.No Brand Name Model Number Gross Volume(Litres) Storage Volume(Litres) Electricity consumption (unit per year)
      1 LG GL-D302RPJL 285 259 242
      2 LG GL-D292RPJL 258 237 238
      3 LG GL-E302RPTL 285 259 242
      4 LG GL-M302RATL 285 259 242
      5 LG GL-M302RLTL 285 259 242
      6 LG GL-E292RPTL 258 237 238
      7 LG GL-M292RATL 258 237 238
      8 LG GL-M292RLTL 258 237 238
      9 SAMSUNG RT29HDRZESA/TL 275 255 248
      10 LG GL-P302RPJL 285 259 242
      11 LG GL-P292RPJL 258 237 238

      Hope this helps.

      Regards,
      Abhishek

  3. Gurpreet Singh says:

    Hello Abhishek,

    Thanks for your valuable and precise inputs about the inverter technology of refrigerators.

    Which company provides the best Split ACs with inverter technology in 1.5 ton ?

    Thanks in advance.

    Gurpreet Singh Sidhu

    • Abhishek says:

      Hello Mr Singh,

      Personally from a technology point of view we have a preference for Japanese brands, but truly every brand has its own pros and cons. But all brands offer inverter technology AC in 1.5 ton.

      Regards,
      Abhishek

      • Gurpreet Singh says:

        Hello Abhishek,

        Prior to buy split Inverter AC, I want to know what would be the Tonnage of the Air Conditioner for following:-

        *Area (sq. ft) – 130
        *Height of the room. – 10 ft
        *Usage of the room – Bedroom
        *Maximum No. of Persons in the room at any given point of time. – 3
        *There is no wall which that is directly exposed to sunlight
        *Even roof is not exposed to sunlight

        Regards,
        Gurpreet Singh

        • Abhishek says:

          Hello Mr Singh,

          The best thing about inverter tech is that it can auto adjust to your need. So even if you go for a 1.5 ton inverter tech AC and your room needs only 1 ton, then it will auto adjust its tonnage. However to tell you the right tonnage I need to know the city where you are based.

          Regards,
          Abhishek

          • Gurpreet Singh says:

            I live in NOIDA

          • Abhishek says:

            Hello Mr Singh,

            A 1 ton inverter tech AC would be enough for your room. Below are some brands/prices that we got from the internet:

            LG BS-Q126B8R8 Max tonnage 1.15 ton, Price about Rs 39,999 (on compareindia)
            LG BS-Q126B8A4 Max tonnage 1.15 ton, Price about Rs 42,990 (on reliance digital)
            Sharp AH-XP13LV Max tonnage 1.2 ton, Price about Rs 31,700 (on compareindia)
            Carrier Kurve Inverter AC, Price about Rs 35,488 (on compareindia) — Carrier also has a superia inverter range for which price is not known to us.
            Daikin 1 ton Inverter FTKE35, Price about Rs 35000 (on snapdeal)
            Mitsubishi has MSYGE13VA (price of which is not known to us).
            Voltas Delux (DC Inverter) 12V DX 1.0 Ton, Price about Rs 39,990 (on Naaptol)

            Hope this helps.

            Regards,
            Abhishek

  4. vijay says:

    why it is the difference between Inverter compressor and linear inverter compressor

    • Abhishek says:

      Hi Vijay,

      Inverter Technology adjusts speed of compressor motor depending on the heat load in the refrigerator. A regular compressor motor has a rotational movement. LG has a proprietary technology which it calls linear compressor where the movements are linear instead of rotational. LG claims that it saves electricity. Now they have combined the inverter technology with their linear compressor technology and call it linear inverter compressor. So logically thinking linear inverter compressor should have benefits over regular compressor, but the effect needs to be studied and we at Bijli Bachao have not done any research on that yet.

      Hope this helps.

      Regards,
      Abhishek

  5. bhavesh soni says:

    Hello Abhishek,

    I love the direction you work in!! congrats.

    can you guide me apart from SAMSUNG what are other economical models available with inverter tech.

    I have heard about this

    Panasonic NR-B295STW4.

    I am looking aroung 260-300 litre..
    Again thanks!!

    • abhishekjain203 says:

      Hi Bhavesh,

      There are several brands that make inverter tech refrigerators. In fact these days almost all brands have a few models that are inverter tech. But not all brands have models in all sizes. Most brands including panasonic have inverter tech in model of sizes 400 lts and above. I checked the model you mentioned online and it does not have inverter technology. Samsung is the only brand that has inverter tech in smaller size refrigerators. Haier has few that are less than 400 lts but still they are bigger than your requirement. You may also look at BEE 5 star rated refrigerators of the size you need (although inverter tech may save 20% or more electricity as compared to regular ones). Please note a 5 star refrigerator of 260-300 lts would consume about 1.5-1.75 units a day.

      Hope this helps.

      Regards,
      Abhishek

  6. Prasad Mayya says:

    very useful info as usual…. but i found your website very late….

    • abhishekjain203 says:

      Thanks. I am glad that you found it useful. Do sign up for our monthly newsletter to get regular updates.

      Regards,
      Abhishek

  7. sasikumar says:

    it very good, thanks this is same method to air conditioner compressor

    • abhishekjain203 says:

      That is right, the method is same for air conditioners as well. And because of their capability to vary capacity, they save energy. I am glad that you found the information useful.

      Regards,
      Abhishek

  8. Shwetha says:

    nice info…so, if is better I opt for an inverter based refrigerator, if I want to power it using solar energy…since the compressor does not turn ON or OFF but only varies the speed of operation, the surge is usually very low or non existent..am I right?

    • abhishekjain203 says:

      Hi Shwetha,

      You can use PV system with any kind of refrigerator (inverter tech or regular). Just that the sizing of the system must match the maximum power requirement of the refrigerator. You will need a PV module, charge controller, batteries and DC/AC inverter to connect to the refrigerator.

      Regards,
      Abhishek

  9. mayur says:

    This is very helpful information.

    Thank you

    • abhishekjain203 says:

      Thanks Mayur. You can sign up for our monthly newsletter through which we provide latest updates on the website.

      Regards,
      Abhishek

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