Are the new12/24 volt refrigeration systems as good and efficient as
advertised? The full slide show that I use in my presentations can be
viewed on my web at; http://www.kollmann-marine.com

(Richard Kollmann) wrote in message . com...
Are the new12/24 volt refrigeration systems as good and efficient as
advertised? The full slide show that I use in my presentations can be
viewed on my web at; http://www.kollmann-marine.com

I have your book and have seen your slide show but what about Glacier
Bay's new Micro machine, is it as good as they claim it is? Do you
recommend them?

(Richard Kollmann) wrote in message . com...
Are the new12/24 volt refrigeration systems as good and efficient as
advertised? The full slide show that I use in my presentations can be
viewed on my web at; http://www.kollmann-marine.com

I have your book and have seen your slide show but what about Glacier
Bay's new Micro machine, is it as good as they claim it is? Do you
recommend them?

(Bill Howard) wrote in message . com...
(Richard Kollmann) wrote in message . com...
Are the new12/24 volt refrigeration systems as good and efficient as
advertised? The full slide show that I use in my presentations can be
viewed on my web at; http://www.kollmann-marine.com

I have your book and have seen your slide show but what about Glacier
Bay's new Micro machine, is it as good as they claim it is? Do you
recommend them?

Bill, I new when I started preparing to write the 12 volt
refrigeration book, three years ago, that the book should cover the
more popular brands of 12 volt refrigeration with capacities of less
than 12,000 Btu per day. My book, Do It Yourself Boat Refrigeration
released in 2000 covered the systems over 12,000 Btu per day.

I saw a cutaway model of the Micro at the boat show; it is a nice
looking unit with interesting new technology for boat refrigeration.
It will take some time before these units reach South Florida, the
Bahamas and the Caribbean, which are the true proving grounds for
refrigeration. Maybe your posted interest in Glacier Bay's Micro
machine will be responded to by boat owners that have the Micro.

The refrigeration units that I recommend for extended cruising must
meet the following:
• The units or components must have accumulated a total aggregate of
100,000 hours in mobile refrigeration operation
• The system or its components must have a proven reliability rate of
..5 per 1000 hours or better.
• The system must match the owner's needs and function properly in the
intended cruising area climate.
• The system must be repairable locally.
• There must be more than one source for replacement parts.
• The company must have a good after market support record.
I realize that if everyone followed my conservative advice there would
be no state of the art improvements in boat refrigeration and we might
all still be buying ice.

(Bill Howard) wrote in message . com...
(Richard Kollmann) wrote in message . com...
Are the new12/24 volt refrigeration systems as good and efficient as
advertised? The full slide show that I use in my presentations can be
viewed on my web at; http://www.kollmann-marine.com

I have your book and have seen your slide show but what about Glacier
Bay's new Micro machine, is it as good as they claim it is? Do you
recommend them?

Bill, I new when I started preparing to write the 12 volt
refrigeration book, three years ago, that the book should cover the
more popular brands of 12 volt refrigeration with capacities of less
than 12,000 Btu per day. My book, Do It Yourself Boat Refrigeration
released in 2000 covered the systems over 12,000 Btu per day.

I saw a cutaway model of the Micro at the boat show; it is a nice
looking unit with interesting new technology for boat refrigeration.
It will take some time before these units reach South Florida, the
Bahamas and the Caribbean, which are the true proving grounds for
refrigeration. Maybe your posted interest in Glacier Bay's Micro
machine will be responded to by boat owners that have the Micro.

The refrigeration units that I recommend for extended cruising must
meet the following:
• The units or components must have accumulated a total aggregate of
100,000 hours in mobile refrigeration operation
• The system or its components must have a proven reliability rate of
..5 per 1000 hours or better.
• The system must match the owner's needs and function properly in the
intended cruising area climate.
• The system must be repairable locally.
• There must be more than one source for replacement parts.
• The company must have a good after market support record.
I realize that if everyone followed my conservative advice there would
be no state of the art improvements in boat refrigeration and we might
all still be buying ice.

So far I have seen only one installation and I have to say that it is
pretty impressive. Kevin really thought outside the box with the
design. It is hard to say exactly how much was due to the compressor.
I only watched it through one freeze down cycle and this was a gold
plated full blown GB installation with Spider coils which seem to add a
lot to the last part of the freeze down.

OTOH, as Richard says, there is the risk of being on the bleeding edge
with the ice cream melting and the steaks thawing some place where only
standard parts are available.

Bill Howard wrote:

I have your book and have seen your slide show but what about Glacier
Bay's new Micro machine, is it as good as they claim it is? Do you
recommend them?

--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com

So far I have seen only one installation and I have to say that it is
pretty impressive. Kevin really thought outside the box with the
design. It is hard to say exactly how much was due to the compressor.
I only watched it through one freeze down cycle and this was a gold
plated full blown GB installation with Spider coils which seem to add a
lot to the last part of the freeze down.

OTOH, as Richard says, there is the risk of being on the bleeding edge
with the ice cream melting and the steaks thawing some place where only
standard parts are available.

Bill Howard wrote:

I have your book and have seen your slide show but what about Glacier
Bay's new Micro machine, is it as good as they claim it is? Do you
recommend them?

--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com

Seen the seminar and also just been reading the tortuous thread in
2000 - "More on Refrigeration", but it would not let me add a post, so
here goes.

However, what are the views on using the Frigoboat keel coolers?? - as
shown here with either the 35F or 50F Danfoss for a 80 litre freezer
box - top entry and underneath the floor in the "bilge".
http://www.penguinfrigo.co.uk/pdfs/K35F.pdf
Penguin in the UK have been using them for 10 years without any
problems.

Also looking at insulation and achieving an R value of 30. A
Kooltherm duct insulation (phenolic foam) has a k value of 0.018W/m.k
- which seems to be be pretty good compared with other products
located on the WWW, but the formula R = thickness in m/k value only
comes out at 5.5 for a 100mm/4 inch thick layer of foam. Or are my
sums amiss???
Also looking at VIPs and their cost in UK.

TVMIA.

Seen the seminar and also just been reading the tortuous thread in
2000 - "More on Refrigeration", but it would not let me add a post, so
here goes.

However, what are the views on using the Frigoboat keel coolers?? - as
shown here with either the 35F or 50F Danfoss for a 80 litre freezer
box - top entry and underneath the floor in the "bilge".
http://www.penguinfrigo.co.uk/pdfs/K35F.pdf
Penguin in the UK have been using them for 10 years without any
problems.

Also looking at insulation and achieving an R value of 30. A
Kooltherm duct insulation (phenolic foam) has a k value of 0.018W/m.k
- which seems to be be pretty good compared with other products
located on the WWW, but the formula R = thickness in m/k value only
comes out at 5.5 for a 100mm/4 inch thick layer of foam. Or are my
sums amiss???
Also looking at VIPs and their cost in UK.

TVMIA.

(Rob) wrote in message . com...
Seen the seminar and also just been reading the tortuous thread in
2000 - "More on Refrigeration", but it would not let me add a post, so
here goes.

However, what are the views on using the Frigoboat keel coolers?? - as
shown here with either the 35F or 50F Danfoss for a 80 litre freezer
box - top entry and underneath the floor in the "bilge".
http://www.penguinfrigo.co.uk/pdfs/K35F.pdf
Penguin in the UK have been using them for 10 years without any
problems.

Also looking at insulation and achieving an R value of 30. A
Kooltherm duct insulation (phenolic foam) has a k value of 0.018W/m.k
- which seems to be be pretty good compared with other products
located on the WWW, but the formula R = thickness in m/k value only
comes out at 5.5 for a 100mm/4 inch thick layer of foam. Or are my
sums amiss???
Also looking at VIPs and their cost in UK.

TVMIA.

Keel coolers have been used on commercial fishing boats for years to
remove the process heat from oil, AC and refrigeration. The Frigoboat
Keel Cooler works well with the small Danfoss BD compressor systems
and I have recommended them for boats with limited onboard DC power
systems cruising in warm climates. For a freezer of 3.8 cu. ft. I
would use a BD 35 if the cruising climate water temperature are below
75 degrees F. If cursing in areas where the seawater is above 75
degrees F. I would install a BD50. In either case I would make sure
there was a quick way to shift compressor speed for the best
performance.
As to Keel coolers, their service life is questionable, they need to
be inspected and cleaned regularly. Always consider how salt water may
attack and corrode metal appendages on boats. Keel coolers have been
known to fail letting salt water into the refrigerant system, this
means the entire system is junk. I would ask you, why do you want a
keel cooler? Say when you size your refrigeration unit you are able to
use a compressor the size of a BD50.. For a savings of three amp-hrs
per day or even six a day in the tropics, do you really need a keel
cooler? A fan air-cool condensing unit, I believe to be the most
efficient, see FAQ #33 on my web site. Remember that fan cooling of
the Danfoss module and even the compressor may still be required in
warm climates.

As to your question about conversion of R value to K value I can't
find the formula and I have no experance with Phenolic Insulations.