My father and I are having a debate about Refrigerator Efficincy. My father was

Jump to Last Post 1-4 of 4 discussions (4 posts)
  1. profile image50
    ed mc mahonposted 8 years ago

    My father and I are having a debate about Refrigerator Efficincy. My father was taking bottled...

    water out of the frig to make it cheaper to run and I had suggested that it runs cheaper by having it more full. My thinking was that the energy used in cooling the items the first time overweighs the efficiency because the opening and closing of the door in an nearly empty frig all the cold air escaped , replsaced by warm air, whereas if the frig is nearly full ...less air to escape , less warm air in, and everything in the frig is cold already and will help retain the colder temperture once the frig door is back closed???

  2. Daniel J. Neumann profile image60
    Daniel J. Neumannposted 8 years ago

    It depends on the initial temperature of the items as you put them in. After they cool enough, the refrigerator barely has to pump any heat out of it.

    If I were you, I'd just get an Einstein fridge:

  3. profile image0
    David99999posted 7 years ago

    You know...I never considered this, before, but, I agree with your reasoning.  It's a basic concept of Physics that denser molecular structures (e.g., water, hard plastic, etc.) retain heat longer than air does.  Therefore, the fuller the fridge - as long as the door is kept closed), more efficiently it should run.

  4. Efficiency Man profile image60
    Efficiency Manposted 7 years ago

    Initially, it does seem like this would be the case. Indeed, if you compare a fridge full of water bottles to an empty fridge, the full fridge will tend to retain a colder temperature inside after you open the door and then shut it.

    However, think about it this way. When you open the door of either a full or empty fridge, basically the same amount of air will escape out, and that air will be the same temperature in either case. So both fridges would lose the same amount of coolness (i.e. gain the same amount of heat).

    How do you reconcile this with one fridge retaining a colder temperature than the other? The specific heat of water is higher than air, or some might say it has more thermal mass. The energy required to remove heat from each medium is given by the formula Q = C*delta-T, but C is different for each medium. So it can take just as much energy to bring a fridge full of water down by 2 degrees as it would take to lower an empty fridge by 5 degrees, for example.

    However, these two scenarios are not quite the same. As someone who pays the A/C bill might realize, the cooler you set the thermostat, the more energy it takes to do that. The energy requirement does not just increase linearly as you lower the temperature. It is more than that. This is because as the refrigerant runs through the cooling coils, it absorbs heat more efficiently from a warmer atmosphere.

    In summary, you will have to remove the same amount of heat either way, but the refrigerator compressor may actually run less and use less energy when the fridge is slightly warmer on average -- when it is lacking the water bottles. It is very counter-intuitive.


This website uses cookies

As a user in the EEA, your approval is needed on a few things. To provide a better website experience, uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at:

Show Details
HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
LoginThis is necessary to sign in to the HubPages Service.
Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
AkismetThis is used to detect comment spam. (Privacy Policy)
HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the or domains, for performance and efficiency reasons. (Privacy Policy)
Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
MavenThis supports the Maven widget and search functionality. (Privacy Policy)
Google AdSenseThis is an ad network. (Privacy Policy)
Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
Index ExchangeThis is an ad network. (Privacy Policy)
SovrnThis is an ad network. (Privacy Policy)
Facebook AdsThis is an ad network. (Privacy Policy)
Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
AppNexusThis is an ad network. (Privacy Policy)
OpenxThis is an ad network. (Privacy Policy)
Rubicon ProjectThis is an ad network. (Privacy Policy)
TripleLiftThis is an ad network. (Privacy Policy)
Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)