Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. rknauer

    Dew Point Control

    Texas has its own power grid - no blackouts for us. Because the state is growing so rapidly, electric power generation capacity must increase rapidly - and that costs money. We would rather pay now than pay later - like California. So our electric bills, which are regulated by the Public...
  2. rknauer

    Dew Point Control

    Of course - that's what it is. When it gets very hot outside the condenser is less efficient. The condenser unit sits in the backyard facing the south so it gets a steady dose of sunlight all day long. Would it be worth the expense to shade it from the direct sunlight? As far as leaving the...
  3. rknauer

    Dew Point Control

    You ask why we keep the computers running. Good question. I try to get my wife and children to shut them off when not in use but they bitch that they have to restart them. As far as energy saving mode, I agree that they should not be putting out so much heatr. But the fact is they are. Here is...
  4. rknauer

    Dew Point Control

    My neighbors do not have 4 computers running all the time. As I said, when the computers are off, everything works as it should. It's only when the computers are running that I have a problem.
  5. rknauer

    Dew Point Control

    Thank you for the recommendation. But I have so much else to read up on that I will defer to the experts on matters such as this.
  6. rknauer

    Dew Point Control

    I am not qualified to debate your figures. All I know is that when the computers are not running and I set the setpoint to 79-80F, the house is comfortable. The unit has to be removing humidity because the air feels comfortable. If I shut the unit off for a while the humidity builds up to a...
  7. rknauer

    Dew Point Control

    1. I can't afford to run the compressor 24x7. 2. The unit performs adequately when the computers are turned off. It cycles even in the hotest weather. But turn those 4 computers on and I have to raise the setpoint several degrees to get it to cycle at all. 3. New England summers are nothing...
  8. rknauer

    Dew Point Control

    Thanks for all the information. I will wait until next summer to implement a thermidistat and then only if the price comes down significantly - which will tell me the mass market has bought them. If that happens then local a/c contractors will have gained some experience and can tell me if the...
  9. rknauer

    Dew Point Control

    quark wrote: >Some points to note before constructing a PMM1 (PMM of first kind). You are using unfamiliar jargon. What is a PMM? >(A DX unit has better COP, around 4.5) DX? COP? >it will be good if we are provided with typical data of DBT and WBT day and night. I can tell you DBT. It is...
  10. rknauer

    Dew Point Control

    chicopee wrote: You may be miserable between April and November but I bet you the rest of the year must be great. --- It all depends on ENSO (El Nino Southern Oscillation) and the subtropical jet stream. Some "winters" (late Nov to early April) are great, whereas some are cold, wet...
  11. rknauer

    Dew Point Control

    I have two separate problems that are related. 1. Computers cause me to have to raise the setpoint because if I don't the A/C unit will run all the time on days when it is above 95F outside. Even when I run the A/C unit at a higher setpoint the humidity is marginally comfortable. The unit...
  12. rknauer

    Dew Point Control

    ChasBean1 wrote: The COP represents two energy-in terms. The heat energy absorbed into the refrigerant at the evaporator is about three times the work energy in by the compressor. The COP neglects the heat rejected term, which is the latent and sensible heat lost by the refrigerant in the...
  13. rknauer

    Dew Point Control

    That's remarkable, particularly in light of the conservation of energy: 1 joule of energy per second input and 3 joules of heat per second output. It appears that the First Law of Thermodynamics is being violated. Or am I missing something here, like the actual meaning of the expression &quot...
  14. rknauer

    Dew Point Control

    I want to be able to use only existing equipment for now. I think the "thermidistat" might be the solution, albeit limited in comparison to a profession installation that deals explicitly with humidity control, as you suggested. My goal is to get out of having to manually adjust the...
  15. rknauer

    Dew Point Control

    After I posted the above reply I came across what I was looking for. It is called a "thermidistat" and is sold by either Carrier or Bryant (identical units). Prices were all over the map so I will have to look carefully for the best deal.
  16. rknauer

    Dew Point Control

    >Why can't you use a humidistat? A humidistat is designed to be used with a separate humidifier/dehumidifier. Do you have a way to use it in conjunction with an ordinary thermostat to control the A/C unit? Would it be possible to hook up the A/C control wires in parallel with the contacts of...
  17. rknauer

    Dew Point Control

    I have a residential application in Houston where the humidity is oppressive during the warm months (April - November). Dew points are almost always in excess of 70F, and 75F is typical during the daytime. I find I have to manually adjust my conventional thermostat throughout the day to get the...

Part and Inventory Search

Back
Top