all is set up, headed out first thing in the morning to pick up my new 28 mega, missing motors but very clean otherwise and at $ 500 a real steal.. ok, back to the holdover plate question. yes, I made mine, all stainless and filled with a mixture of glycol ( antifreeze ) and water, I usually run it down to minus 10 and then shut the system off, its been a very simple system, bought a used 5000 btu window a/c for $50 and pulled the compressor, made a watercooled condenser with a piece of 3" copper and have a bunch of passes of 1/4" copper inside it, as far as metering valve I simply used a good quality needle valve on the 1/4" copper just before the copper enters the holding plate and it acts as a metering valve / expansion valve for the refrigerant, a more elaborate system could use a tx valve but this is good enough as I have a pressure gauge to set it by. of course if I ever was at dock I would simply plug it into 110 and have a thermostat but since it is used only on week ends and longer trip to baja california I simply run the generator (honda IE 2000 ) on the transom once in the morning for 20 minutes and once in the evening, its so quiet you barely hear it. a easy way or those who don't have a welder or much fab tools would be to simply get a stainless container or tray, some fancy shapes can be found at commercial kitchen supply stores, the top can even be left open if it is deep enough and fill it with glycol and run a coil thru it, for added efficiency a small evaporator coil can simply be immersed in the liquid.. anyways, no need to spend tons of money.. and for those feeling really avant guarde you can even use propane as a great refrigerent, much better tan R134, yes I know, the risk of explosion.well, most have gas engines and the boat has not blown up yet and in europe many car manufacturers actually do use propane refrigereants..., my truck used to have R12, now it has propane.... sadly when it comes to 12V systems the DB50 danfoss is the only way to go, but at 250 for the compressor and another 250 for the controller it's a bit on the high side.. and the funny thing is, the compressor does not run on 12V... ive been wanting to buy a high efficiency 400 btu mitsushita compressor and run it thru an inverter and compare things as it is basically what danfoss is doing... give or take a few volts... oh and the compressor is only $ 120 and about $20 for a nice small computer grade inverter that will handle 150Watts... well, that probably more than you asked for... Eric ----- Original Message ----- From: tomdepot<mailto:[email protected]> To: UnifliteWorld<mailto:[email protected]> Sent: Friday, April 23, 2010 5:31 PM Subject: [UnifliteWorld] Re: uniflite MEGA 28
Eric So whats up, did you grow tired to the express? Decide the Mega is that much roomier? Are you going to transfer your cummins to the mega? Sorry to be off subject, but there is a Supercoldmachine and cold plate for sale on eBay. Its at least 7 years old, and no connection lines. The guy wants 750 for both, and some assorted spare parts. Is your cold plate rig still running? I really would prefer to do something like that, but I am wondering if this would be worth it if I could pick it up for 250 or so (probably not), since it is 12V. Did you make or buy your holdover plate? Tom in Florida -- You received this message because you are subscribed to the Google Groups "UnifliteWorld" group. To post to this group, send email to [email protected]<mailto:[email protected]>. To unsubscribe from this group, send email to [email protected]<mailto:[email protected]>. For more options, visit this group at http://groups.google.com/group/unifliteworld?hl=en<http://groups.google.com/group/unifliteworld?hl=en>. -- You received this message because you are subscribed to the Google Groups "UnifliteWorld" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/unifliteworld?hl=en.
