I need a formula  to find out how can i choose an air conditioner ?
92166
Try\n\nhttp://www.geokiss.com/hsoftware.htm\n\nit is a collection of formula's and software for HVAC
1165015
The diffential flow rate betwwen air and fluid depends on the following factors. An exact equation is very difficult.\n1. type of fluid used because of the viscosity of the fluid.\n2. altitude and barometric pressure of the test location.\n3. test pressure\n4. temperature of the test air.\n5. many more\n\nAs you can see the formula for this would be very long. A rough formula you may try would take into account.\n1. volume of air at what rate.  in2/sec\n2. pressure for the air to obtain that volume\n3. viscosity of the fluid\n4. use 1 and 2 as baseline with air density\n5. compare 4 with fluid viscosity at desired pressure\n\nI know I couldn't give you a formula but I hope this may help you.\nYou may try math2.org for formulas or search for math formulas.
1062055
The best routes to take are to research the process of starting a business as well as the industry you're interested in.\n\nI recommend checking out the SBA, Entrepreneur, The Start Up Journal & Nolo. All 4 are great informational resources for the new/small business owner. I posted links for you in the source box.\n\nAssociations may be a good avenue to explore as well. These organizations will address many of the thoughts, questions and concerns you'll inevitably have as well as many you haven't anticipated yet. See the source box for some relevant links. \n\nResearch, research, research – this cannot be stressed enough. Read as much as you can about the industry. Here are some book titles that are relevant:\n\n* How to Start & Manage an Air Conditioning & Heating Business by Jerre G. Lewis, Leslie D. Renn\n* The Business Plan for Your Air Conditioning and Heating Company by 125aday.com Publishing\n\nHope that helps! I wish you much success & happiness in all your ventures!
57870
You would want at least 50,000 BTU, Hope this will answer your question. I had an 1800 sq. ft. home once so I know. It costed me $5,000.00 installed with A/C and ducts.
754142
It seems like you could figure the relative humidity based on the pressure, temperature, specific volume, etc.  After that you could figure the volume of condensation on a per cubic meter basis.  You would need a total volume to come up with the total mm/day.  Hope that helps get you going on the right path to an answer.  If not, you should re-post your question with additional information- I get the feeling you left something out.
544081
ok remember that freon or r134 are used in AC but is not like it is a substance that stays cold... you to compress it in order to make it liquid and then it absorves heat and evaporates completing the cycle... if you are looking for a sort of system that will make something stay cool.. .hmmm man it is called Air Conditioned
527581
Expansion coefficients for air can be determined using the attached link.\n\nBest wishes !
25140
Oregon Scientific makes a good one:\nhttp://www.ambientweather.com/wmorscwiprwe.html\n\nYou can look at some alternates there too.
221318
An air conditioner usually brings in some air from the outside. Even if it doesn't, no room in your house is anywhere near airtight-- for example, your door has a gap in the bottom of at least 1/4 to 1/2 inch.
1095527
http://walking.about.com/library/cal/uctemp.htm\n\nThis one is great. The mathematical calculation is easy, but if you don't want to pull out your calculator, this one does it out to two decimal points.
1164804
I don't know if this what you are looking for, but here is a page which gives many types of meteorological equations.\n\nhttp://members.aol.com/Accustiver/wxworld_calc.html
1087751
The amount of air is the difference in volumes.\nA = V(r+1) - V(r) = (4/3)pi (r+1)^3 - (4/3)pi r^3\nA = (4/3)pi((r+1)^3 - r^3)
458975
Try Thermo.com/neslab contact them with any questions you have.
477998
An Air conditioning system normally just cools the air in the room (or vehicle) in which it is fitted.\n\nIt works like a refrigerator but expels the warm air to atmosphere rather than the room.\n\nThe disadvantage of the normal system is that it dries the air.\n\nSome systems can apply heat too so that a controlled temperature can be selected from a much wider range, and more sophisticated systems can maintain a desired humidity.
37336
www.ecoquest.com/natewurm\n\nThese are much better than the Ionic Breeze as they cover more area, 1 unit can purify up to 3000 sqft...as well, they have a $100 off offer if you trade in your Ionic Breeze for one of the units.  I have the large unit in my home as well as my parents, in laws, pastor, etc....they work great!!!  Perfect for people with bad allergies, as my mother in law rarley has to get her allergy shots now...
370121
an air conditioner helps to maintain the room at  ambient conditions suitable for human comfort by monitoring the parameters like humidity,temperature,dust etc where as a refrigerator keeps the temperature within the system lower than that of the surroundings by using 2nd law of thermodynamics.
52317
Can't really remember, but one of them is the CFC in air conditioners