Originally Posted by ErikFinn
So do I understand correct that this tweaked system makes more BTUs than the original one in ideal conditions? If so, why? Because of the larger condenser? Because of the receiver dryer? Or because of the TXV?
I know its early to say but could this system be more reliable than say a standard AB BD 35 system off the shelf?
How about the budget
? How much did you spend on the new parts
To your questions ,
YES YES AND YES .
this is a little article I found describing some of the advantages.
Thermal Expansion Valve - Thermal Edge
The main reason they are not used in small marine refrigeration
systems is PRICE
I think I spent about a thousand dollars putting my system together from cobbled up parts on e bay and Rparts , thats not including the tools.
But i am very happy with my system and am about to build another one for my freezer
Technautics Cool Blue system uses a TXV in there system. It is three times the price
of a comparable capillary system but well worth the money
They use a holding plate which works just fine , but I wanted tighter control over box swing temperatures so i used a flatbond evaporator plate . Nobody builds a system like that, so i built one .
As for reliability
a capillary system is very sensitive to dirt or moisture . Because you are not limited to the amount of refrigerant you can put in a TXV system, you can install a very large receiver dryer , which takes out much more moisture and has a very large filter area to stop any particles from jamming in the capillary tube which is a huge problem . Also you can have a huge condenser for just the same reason and this is another thing that just makes it all work more efficiently. I am using a 10 inch low rpm
fan on my condenser and you can not hear it run. I am getting a great amount of subcooling through it.