jshap1
11-23-2008, 09:01 AM
I have read through many post some stating there is a formula some stating there is not. Can anyone please assist or add valued input if they are aware of the facts. I am aware that nothing will be 100% accurate but am confident an excel spreadsheet would be able to assist if I have the abilty to obtain all utility bills required. Also, I had a book that showed this formula but no longer have that book.
Thanks
James2011
11-23-2008, 05:53 PM
each brand is different, for example, water usage in wascomat and speed queenis not the same amount...
so, you need to calculate each case by case,
the fundamental of water usage formula is to find out about "revenue" from washer side of business based on retro-calulation of water usage on each machine....
1) you need to ask or look at how much each machine(each pound different, e.g. 18ln, 35lb etc..) use how much gallon o water per cycle
2)standard cycle like factory setting cycle, or some owner adjusted cycle e.g. remove "pre-wash" or "rinse" step...all these adjustment can effect the amount of water
3) need to consider what kind of temp, customer selects: Hot or warm or cold....
4) how many turn per day you need to know
5) how many TPD each week day and weekend
6) normally dryer revenue is around +/- 50% of washer revenue
So, formula is just formula, the more important thing is you need to figure it out at least all above data, the more accurate, the more trustful numbers you can get...but difficulty is you need to spend maybe at least two weeks full time(maybe you have to hire some people) to monitor and keep log all machines' usage everyday...
Howard
11-23-2008, 06:53 PM
...and the formulas are not perfect either. You can find out how much water a certain model of machine uses in the lab - but is that based on running empty or running with towels or what. Different types of garments absorb different amounts of water. Different items displace different amounts of water and the water level is based on the weight of the column of water in the machine. Bottom line - you will get ballpark - but never perfect.
Also what if you drain valve is not sealing 100% but only 98%? Can make a difference.