Since the cistern is an isolated source without regular makeup water, you have to think of the problem as a shell and tube heat exchanger
q= M Cp Dt Where
Q = specific heat of water 4.18
M = mass flow rate pumped water in lbs mass per hour in this case 5 gpm x 60 minutes =300 gph x 8.34 lbs/gal=2502 lbs mass/hour or 60048 lbs mass per day
Cp= specific heat 4.18 divided by Delta temp Dt inlet and outlet of heat exchanger
Dt= T2 - T1 outlet - inlet of heat exchanger
1 BTU is the energy to raise 1 lb mass of water 1 degreee
Its easier to convert to lb/mass per hour simply because thats the way I learned it many years ago. You need to make some assumptions too. Without the heat being added to the cistern water being removed the differential temps are a moving target and the efficiency of the heat exchanger is not 100% due to tube fouling and other stuff.
Further as the concrete container acts as an insulator temp in the heat sink cistern will gradually increase.
After 1 day or 7200 gallons pump throughput you should begin to see a temp increase depending on system efficicency.
7200 gallons is a pretty big cistern and thats just 1 day at 5 gallons a minute.
Also you're going to see a higher dewpoint as temperatures rise under the house in that space leading to all sorts of nasty molds and maybe rot.
Cooling water requires treatment. Bleach maybe? I don't know, I didn't work in chemistry. we used sulphuric acid and other stuff location dependent.
Bottom line line is it would work at least for while until your heat sink became elevated in temperature or what I would call saturated. Then use it in the winter for heat I guess. LOL
I just don't think your heat sink is big enough for it to last a long time.
Upload one or more videos to your post. Photo and video filesizes should be less than 8MB. Formats allowed are gif, jpg, png, ogg, mp4, mov, and avi. Be sure to use filenames without spaces or special characters, and filetypes of 3 digits lower case.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
