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Yes, you are right there is a fluctuating. There were no other way at that time to do. getting hot water with out increasing the H.Ex. size. (The re-circulating pump 90 gpm was only 50 gpm before replacing it). Regarding results rather than practical testing. Sure there is a math to...

At the beginning lets assume that the system just started Now (That means the temperature in the tank and only for the first time will be 106 Deg F): Once the tank reaches to its maximum level 47" from the bottom, the city water stops the re-circulating pump 90 gpm kinks in (While the out put...

It is not Closed. I am still able to access It.

Do you think that I can get an electronic copy from Harvard Library. Because other than that they need pin no. Thank absrbrtek

Yes that is right. For the Recirculating pump gpm = 90 work only when city woter is Off. Thanks.

Do you think that I can find it some where electronicaly printed? Even I tried to contact the publisher couldn't find! Thanks.

No, that is not right. the tank never come empty and it does not (only supplied from city water). Maximum hieght it reaches is 47" from the bottom of the tank and minimum hieght it goes down is 31" (Not zero (empty)). there for it vary 16" between maximum and minimum. If the situation is as...

Please if it is possible for any can lead me where to find or show me web if available on web the book mentioned below: Capitoline trans-a-plate design manual for heating, ventilation and air conditioning By Lee Kendrick Thanks in advance.

We have a tank to be used as hot water tank has a diameter of 34”. Tow pumps are connected to the tank one is 60 gpm takes the hot water from the tank to the building. The second one re-circulates within the Heat Exchanger (Steam – Water Heat exchanger, gets steam 110 psia). City water pipe...