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Search: Posts Made By: bigsmile
Forum: Geothermal & Heat Pumps 12-30-10, 06:04 PM
Replies: 1,940
Views: 1,432,987
Posted By bigsmile
I wonder if you are talking about reducing...

I wonder if you are talking about reducing super-heat. If that's the case, you should increase the charge. If you reduce the charge, the pressure of both sides will reduce, so the saturation...
Forum: Geothermal & Heat Pumps 12-30-10, 12:17 PM
Replies: 1,940
Views: 1,432,987
Posted By bigsmile
AC_Hacker, I think on the low side it should...

AC_Hacker,

I think on the low side it should be super heat, and thus it's sub-cool on the high side. There seems to be a little too much super heat. My theory is that the cap tube you use were for...
Forum: Geothermal & Heat Pumps 12-29-10, 03:38 PM
Replies: 1,940
Views: 1,432,987
Posted By bigsmile
My thinking is that if both exchangers are...

My thinking is that if both exchangers are oversized, then both can handle the capacity that the compressor runs at, thus, they may not be exactly the same size but neither will be tested to find out...
Forum: Geothermal & Heat Pumps 12-29-10, 02:05 PM
Replies: 1,940
Views: 1,432,987
Posted By bigsmile
I really mean it when I said I'm not sure. I read...

I really mean it when I said I'm not sure. I read about refrigeration a little, but it's all theory. No one really told me much about consequences of these theories, and I have to figure it out...
Forum: Geothermal & Heat Pumps 12-29-10, 02:39 AM
Replies: 1,940
Views: 1,432,987
Posted By bigsmile
I only recently started to read about...

I only recently started to read about refrigeration and air conditioning, so I am really not sure about this; but it seems to me that the temperature difference between refrigerant in and out is...
Forum: Geothermal & Heat Pumps 12-29-10, 01:40 AM
Replies: 1,940
Views: 1,432,987
Posted By bigsmile
Like AC_Hacker, I tend to believe that most of...

Like AC_Hacker, I tend to believe that most of the issues you listed here can be addressed by design and experimentation. For example, for 1, refrigerant is not supposed to leak out anyway. Ground...
Forum: Geothermal & Heat Pumps 12-22-10, 09:49 PM
Replies: 1,940
Views: 1,432,987
Posted By bigsmile
I just recall something when I read about DX hp....

I just recall something when I read about DX hp. I think the oil return problem isn't restricted to vertical arrangement of coil. Long run of horizontal coil may also have this problem. To...
Forum: Geothermal & Heat Pumps 12-22-10, 08:45 AM
Replies: 1,940
Views: 1,432,987
Posted By bigsmile
If DX is used on the sink end, as well as the...

If DX is used on the sink end, as well as the source end, this may be able to solve the problem of refrigerant imbalance between heating and cooling. During cooling, the refrigerant in the floor coil...
Forum: Geothermal & Heat Pumps 12-21-10, 08:22 PM
Replies: 1,940
Views: 1,432,987
Posted By bigsmile
Got the file. Thanks a lot. With this, I may be...

Got the file. Thanks a lot. With this, I may be finally able to put together a plan and get into action.
Forum: Geothermal & Heat Pumps 12-21-10, 05:18 PM
Replies: 1,940
Views: 1,432,987
Posted By bigsmile
It turns out that I need to have 20 post to send...

It turns out that I need to have 20 post to send email on the forum. (I even need 5 post to be able to post email address.) I'm sure I'll get there sooner or later, but at the moment, if you don't...
Forum: Geothermal & Heat Pumps 12-21-10, 05:18 PM
Replies: 1,940
Views: 1,432,987
Posted By bigsmile
I need to post this to be able to post email...

I need to post this to be able to post email address.
Forum: Geothermal & Heat Pumps 12-20-10, 10:39 PM
Replies: 1,940
Views: 1,432,987
Posted By bigsmile
One thing about the efficiency is that the...

One thing about the efficiency is that the compressor you use may not have very high efficiency to start with. I think most window AC units have EER value below 10. The compressors in central AC...
Forum: Geothermal & Heat Pumps 12-20-10, 10:14 PM
Replies: 1,940
Views: 1,432,987
Posted By bigsmile
Thanks for the reply, and for the invitation to...

Thanks for the reply, and for the invitation to join. I also believe that when it comes to heating and cooling, GSHP should be the way to go. But the current situation is that the high cost spoiled...
Forum: Geothermal & Heat Pumps 12-20-10, 03:47 AM
Replies: 1,940
Views: 1,432,987
Posted By bigsmile
Thank you very much for the detailed answer. Mean...

Thank you very much for the detailed answer. Mean while, during the hours I posted my question and now, I have roughly gone through this thread. One thing I'm curious about is that early on (in about...
Forum: Geothermal & Heat Pumps 12-20-10, 12:12 AM
Replies: 1,940
Views: 1,432,987
Posted By bigsmile
May I ask why you need to drill for closed loop...

May I ask why you need to drill for closed loop water exchange setting? All the source I learned seemed to use trenches instead of wells. I'm really confused because usually they drill wells (shallow...
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