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HR20 Power Consumption?

Discussion in 'DIRECTV General Discussion' started by georgecostanza, Aug 21, 2007.

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  1. Tom Robertson

    Tom Robertson Lifetime Achiever DBSTalk Club

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    Nov 15, 2005
    I have all -700s. I'm curious as to the -100 usage as it was a different manufacturer and different design beyond the basic chipset.

    Cheers,
    Tom
     
  2. Halo

    Halo Godfather

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    Jan 13, 2006
    Via has a low power system (1.5Ghz, 512MB, DVD drive and motherboard) that uses just under 35 watts (load), 25 watts idle. Intel and AMD also have some very low power cpus now. For a very basic setup it's possible but with a higher performing system, especially with a top of the line graphics card, it will be way over 50 watts.

    Utilities minimize transmission losses with very high voltage (and correspondingly lower current). If Nevada was the sole power generator in the US then sure, transmission losses would increase just based on the distance to serve the east coast. As for storage losses the additional PV generation would be on line during daylight hours, which is the time when load is at the highest anyway. Unless PV systems were the sole power source then storage wouldn't be a concern.
     
  3. DBordello

    DBordello Legend

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    Dec 16, 2006
    This is a very interesting thread, but there seems some ambiguity/confusion regarding the units that are being used on these numbers. The HR20 (or insert favorite electronic here) draws energy, it uses this to perform its function.

    The metric (and everything in this thread has been in metric so no need to confuse the matter furhter) unit of ENERGY is the Joule (J). It make take 10J to spin up the hard drive (example). The electronic device is continiously drawing energy so another property is defined, POWER. The metric unit of power is the watt. It is defined as 1J/sec. Therefore as the electronic device is in use it is drawing so many watts, which is how many Jouels it is using per second.

    The unit kWh (kilo-watt-hour) is commonly used. This is an amount of ENERGY (1000*1J/sec*3600sec/hour =3,600,000J). Which, in my opinion, is a ******* unit.

    My only reason for pointing this out is that when comparing energy saved per year you make sure that you are providing a logical number. Saying that you save 10kW a year isn't saying anything, as you are talking about POWER, not ENERGY. If you were to cut the consumption of the HR20 by 10watts (POWER) you would save 10watt*years (ENERGY) per year, or 88kWh (ENERGY).
     
  4. JeffBowser

    JeffBowser blah blah blah

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    Dec 21, 2006
    With that single post, you have rendered my beef and bean burrito comment to the trash bin of total ignorance :lol:

     
  5. daniellee

    daniellee Legend

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    Jun 15, 2006
    Here's a few Kill-A-Watt readings from my D* equipment;

    HR20-100 - 35 watts
    HR20-700 - 28 watts
    H20 -100 - 20 watts
    1st 8ch SWM - 20 watts - this one powers the dish
    2nd 8ch SWM - 12 watts - splitters block power to the disk on this one

    A friend of mine has 2 H20-600s that run very hot but I haven't had a chance to test them yet. Guessing they draw around 60 to 80 watts.
     
  6. pcbosis

    pcbosis Cool Member

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    Sep 22, 2006
    I just hooked up my kill a watt device attached to my hr-20-100 receiver and it shows it drawing 36 watts of power either with the power on or off because of the hard drive caching the data.
     
  7. techntrek

    techntrek Godfather

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    Apr 26, 2007
    DBordello - seems you have complicated things for no reason and have presented incorrect information. For starters, joules are measured per second, watts are measured per hour. No power company or power meter used by the general public measures in joules, so why bring it up at all? Same for the difference between power and energy - yes there is a difference but most consumers don't care. They get charged for the aggregate (energy over time) and not the instantaneous (power measured at a given point in time).

    As for cutting 10 watts = 88 kW saved per year, that number is incorrect since we are talking about shaving off watts when the unit is in standby. The actual amound saved will depend on each user's viewing habits. Since I figure my HR20 is on 6 hours a day, if I can shave off 10 watts in standby I will only save that amount for the other 18 hours a day, or 66 kW saved per year.
     
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