Results 1 to 19 of 19
  1. #1
    Join Date
    Oct 2006
    Location
    United Kingdom
    Age
    33
    Posts
    5
    Rep Power
    0

    Hotel MiniBars Vs My new Eco system



    Hi everyone,

    Its great to have found this site at that point in my research..

    I am looking into a new form of eco friendly novel minibars system for hotels. I plan to use ice or chill packs, which does still use energy but i think much less energy than individual minibars in each room. The plan would be to have deep freezers on each level to freeze the ice and this would then refill the mini bar each day(imagine a beehive filled freezer).

    After doing some basic energy and electricity research i think that a hotel with 300 mini bars would save energy if it used freezers on each level instead.

    Obviously it depends how much ice i freeze, but im wondering if it has plausability and if you have any other research into energy used to freeze ice etc

    Many thanks and i hope this to be my home for the next 7months so all replies and help welcome.

    Your knowledge is vital to me!!

    pynnster



  2. #2
    Join Date
    Aug 2001
    Location
    UK
    Posts
    1,060
    Rep Power
    18

    Re: Hotel MiniBars Vs My new Eco system

    Waste of time.

    Mini bars are always empty these days.


  3. #3
    Join Date
    Aug 2001
    Location
    UK
    Posts
    1,060
    Rep Power
    18

    Re: Hotel MiniBars Vs My new Eco system

    Welcome to the fray, by the way.

  4. #4
    Join Date
    Oct 2006
    Location
    United Kingdom
    Age
    33
    Posts
    5
    Rep Power
    0

    Re: Hotel MiniBars Vs My new Eco system

    they are always full in the top hotels in the uk, are you aware of the new bartech minibar system

  5. #5
    rbartlett's Avatar
    rbartlett Guest

    Re: Hotel MiniBars Vs My new Eco system

    welcome to the dragons den.

    well i for one won't be investing -i'm OUT

    cheers

    richard

  6. #6
    Join Date
    Oct 2006
    Location
    United Kingdom
    Age
    33
    Posts
    5
    Rep Power
    0

    Re: Hotel MiniBars Vs My new Eco system

    this is my final yr project at uni so i am stuck with it rich any info u have would be greatly appreciated

  7. #7
    Brian_UK's Avatar
    Brian_UK is online now Moderator I am starting to push the Mods: of RE Site Moderator : and general nice guy
    Join Date
    Mar 2001
    Location
    Dorset
    Age
    69
    Posts
    10,384
    Rep Power
    49

    Re: Hotel MiniBars Vs My new Eco system

    Well, if it's a project then you had better get the books and calculator out to check your energy sums and labour costings.

    Firstly, does anyone make a freezer that makes ice in useable sizes?
    How are the staff going to transport the ice from freezer to room?
    Will the freezer be able to constantly produce ice as the rooms will need servicing at different times of the day.
    How labour intensive is it? -- Staff walk down corridor to end room to service it, mini-bar needs ice, staff walks back down corridor to collect more ice, ice transfer equipment not available due to other member of staff having. Walk back to room and service room. - Sod ice I'm done for the day.........

    Why not investigate having a pack system serving a cold plate in each mini-bar?

    Good luck with your endeavours.
    Brian - Newton Abbot, Devon, UK
    Retired March 2015
    Please support http://the100project.net/Home

  8. #8
    Join Date
    Oct 2006
    Location
    United Kingdom
    Age
    33
    Posts
    5
    Rep Power
    0

    Re: Hotel MiniBars Vs My new Eco system

    hey,

    there are some valid points you have made and for that i thankyou. Some peoples previous comments have missed the concept.

    I have ben looking into chill packs as a more efficient way to chill the drinks. Lets also not forget im not trying to make millions here just gain a degree.

    This is a concept for people who are staying in Eco friendly hotels for a reason, so with reference to managers keeping customers happy this concept would.

    If i used ice then the run off water would be stored in the bathroom of the room beneith and used to flush the toilet.

    let me know your thoughts

    cheers

  9. #9
    LRAC's Avatar
    LRAC is offline Veteran Poster I am starting to push the Mods: of RE
    Join Date
    Sep 2006
    Location
    Midlands
    Posts
    453
    Rep Power
    12

    Re: Hotel MiniBars Vs My new Eco system

    Hi Pynnster

    Have you thought of this idea and drop electricity altogether, not sure this is any good but hey.

    Absorbtion mini bars use electrical heaters to process the refrigeration cycle, but if your close to the bathroom area why not use the constant hot water supply they always have in bathrooms to replace the electrical side of the system.(you will need a flowing loop though)

    If thats any good i would like to state my claim for royalties.

    Regards
    LRAC
    Last edited by LRAC; 30-10-2006 at 07:15 AM.

  10. #10
    Join Date
    Mar 2006
    Location
    Merate (LC) - Italy
    Age
    46
    Posts
    2,553
    Rep Power
    17

    Re: Hotel MiniBars Vs My new Eco system

    A water cooled minibar would enable you to regain the heat for sanitary purposes or else.

  11. #11
    Join Date
    Oct 2001
    Location
    Nottingham UK
    Posts
    5,061
    Rep Power
    42

    Re: Hotel MiniBars Vs My new Eco system

    Quote Originally Posted by LRAC View Post
    Hi Pynnster

    Have you thought of this idea and drop electricity altogether, not sure this is any good but hey.

    Absorbtion mini bars use electrical heaters to process the refrigeration cycle, but if your close to the bathroom area why not use the constant hot water supply they always have in bathrooms to replace the electrical side of the system.(you will need a flowing loop though)

    If thats any good i would like to state my claim for royalties.

    Regards
    LRAC
    You would need the water temp quite high for Absorbtion cycle (90C) which would mean using heat from the heating system, not the hot water system. But this still wouldn't be of any use because Absorbtion machines have a low COP - around 0.6 : 1 and the energy used to fire the boilers and pumps would be much more than a small vapour compression mini bar would use.
    I'm back on the Pale

  12. #12
    Join Date
    Mar 2009
    Location
    U.S.A.
    Posts
    300
    Rep Power
    12

    Re: Hotel MiniBars Vs My new Eco system

    I agree with Frank, until the room needs to be heated....

    If the heat rejection from the absorption system can be applied to the room space, the absorption unit makes some sense but not a useful by product if the hotel's in the Carribean.

    Why not try a eutectic freezer at each level? Then you won't have to be concerned about the room below's disposition or the guests using the ice IN their drinks...

    I suppose that's cultural as well, but...

  13. #13
    Join Date
    Mar 2008
    Location
    United Kingdom
    Posts
    52
    Rep Power
    10

    Re: Hotel MiniBars Vs My new Eco system

    Maybe it would be possible to incorporate it with a chilled water a/c system. flow and return from and to the water circuits, connect with washer hoses or the likes, stat controlling a water solenoid and a fan blowing over the coil inside. Just a thought. It may be flawed for many reasons but it is your project and it's only chilling beer.
    Last edited by andywill; 08-04-2009 at 08:06 PM.

  14. #14
    Join Date
    Apr 2002
    Location
    scotland
    Posts
    114
    Rep Power
    16

    Re: Hotel MiniBars Vs My new Eco system

    solar water heaters as the heat source, indirect through a buffer and all the mini bars drawing off from it, you could even use underfloor heating manifolds.

    may cause flooding etc and all the mini bars will go down at the same time but hey, they are all empty anyways!

  15. #15
    mual's Avatar
    mual Guest

    Re: Hotel MiniBars Vs My new Eco system

    Hello friends,

    ı want to learn how amonia absorption work and ı want to learn amonia consantiration in refrigerant of hotel type minibar.

    Many thanks and i hope, you help me

  16. #16
    Join Date
    May 2007
    Location
    Auckland
    Age
    67
    Posts
    3,362
    Rep Power
    31

    Re: Hotel MiniBars Vs My new Eco system

    Stayed at several Hotels in Japan over the years. No mini bars no fridges in room. But have on each floor a room with vending machines and an ice maker. Pay as you go, no hassles sorting minibar bills in the morning.
    magoo

  17. #17
    Join Date
    Aug 2009
    Location
    New Zealand
    Age
    53
    Posts
    2,556
    Rep Power
    20

    Re: Hotel MiniBars Vs My new Eco system

    You need to check you refrig fundementals, ice makers run at a lower SST than fridge, thus lower COP,
    plus you increase thermal losses, you have you bar fridge plus the box that stores the ice, plus losses in moving from one place to another, so this option would be less eco freindly!
    The only way to balance the equation, is to recover the heat for water heating, this would be aviable option due to the heat being concentrated in a single point, recovering energy from a hotel bar fridge waste of time, a load profile is required, from this point comparissions can be made
    Mad

  18. #18
    Join Date
    Aug 2009
    Location
    New Zealand
    Age
    53
    Posts
    2,556
    Rep Power
    20

    Re: Hotel MiniBars Vs My new Eco system

    To undertake you load profile certain factors need to be considered
    Occupency
    "a" A heated room, actual thermal loss are zero as fridge is in the room, the only consideration is electrical power, comparision need sto be made between fridge energy input verses energy input for room heating, if heating is electrical then there is no in- efficiency
    "b" Cooled room thermal loss zero,
    electrical power in plus the cost removing the electrical energy, for example COP of air cond is 3, so total cost of running bar fidge is electrical power *1.33
    Mad

  19. #19
    Join Date
    Aug 2009
    Location
    New Zealand
    Age
    53
    Posts
    2,556
    Rep Power
    20

    Re: Hotel MiniBars Vs My new Eco system

    Just seen the date of the original question, I wonder if pynnster got his degree for his "new system"?

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •