On my new boat I will have a powerfull 24VDC battery bank charged by a
diesel generator and auxiliary sources.

I did a bit of search but couldn't find much- are there any 24 VDC
appliances such as cooker/oven, fridge, AC and water heater you could
recommend?

I know I can run standard items through power inverter but I would
prefer not to do it for the sake of reliability/efficiency/cost. I want
to go totally electric (no gas)

Regards Mi

Having a boat is about making your own choices.
But you might be better off to listen to the people who say
that gas is the way to go with cooking and water heating.

Some folks would hold out for a gas fridge too, I expect.
Using electricity is OK for heating if somebody else has
the chore of generating the juice.
You don't have that luxury.

Brian W

On Sat, 10 Jan 2004 22:20:53 GMT, misia
wrote:

On my new boat I will have a powerfull 24VDC battery bank charged by a
diesel generator and auxiliary sources.

I did a bit of search but couldn't find much- are there any 24 VDC
appliances such as cooker/oven, fridge, AC and water heater you could
recommend?

I know I can run standard items through power inverter but I would
prefer not to do it for the sake of reliability/efficiency/cost. I want
to go totally electric (no gas)

Regards Mi

You are going to find out that heating things with electricity takes a lot
of it. That is why gas is used on boats, mobile homes, etc for things that
heat. And why most people run their gensets when using appliances. AC's
use a lot of power too but you might get away with it. Consider this, a
1200 watt electric heater is drawing 10 amps at 120 volts. Drop the voltage
down to 24 volts and now you need 50 amps. I will not tell you it is
impossible but you will need a lot of batteries.

"misia" wrote in message
ail.from.there...
On my new boat I will have a powerfull 24VDC battery bank charged by a
diesel generator and auxiliary sources.

I did a bit of search but couldn't find much- are there any 24 VDC
appliances such as cooker/oven, fridge, AC and water heater you could
recommend?

I know I can run standard items through power inverter but I would
prefer not to do it for the sake of reliability/efficiency/cost. I want
to go totally electric (no gas)

Regards Mi

When we got Lionheart, it came from San Francisco. It had a
rotted-out diesel heater to keep it warm. Sitting right next to this
waste of good diesel fuel, was a Perkins 4-108 diesel heater POURING
heat into its exhaust system so much they had to pour seawater into
the exhaust to cool it.

I've never figured out why boats in cold climates waste all this
energy going out the exhaust. It's SO easy to make a cast iron heat
exchanger in a dry stack, right next to...or even right IN the exhaust
manifold that will just roast your ears with free heat.

We retrieve some of it with the hot water heater hooked to the water
jacket. Too bad so much heat is simply wasted.

I have an electronics shop built into a surplus Air Force stepvan. My
shop heater in winter is a 1KW Honda EU1000i power plant. I welded a
pipe nipple on the little exhaust port with an elbow on the end. This
connects to a copper tubing draining the exhaust gases out the deck
under the truck. Keeps the shop toasty warm while providing me up to
1KW of 120VAC to run my equipment.....I figure I recover 85-90% of the
heat produced by the engine. Its quiet enclosure makes an acceptable
sound level to work in hidden away behind the cabinets.



On Sun, 11 Jan 2004 01:16:43 GMT, "Lawrence James"
wrote:

You are going to find out that heating things with electricity takes a lot
of it. That is why gas is used on boats, mobile homes, etc for things that
heat. And why most people run their gensets when using appliances. AC's
use a lot of power too but you might get away with it. Consider this, a
1200 watt electric heater is drawing 10 amps at 120 volts. Drop the voltage
down to 24 volts and now you need 50 amps. I will not tell you it is
impossible but you will need a lot of batteries.

"misia" wrote in message
mail.from.there...
On my new boat I will have a powerfull 24VDC battery bank charged by a
diesel generator and auxiliary sources.

I did a bit of search but couldn't find much- are there any 24 VDC
appliances such as cooker/oven, fridge, AC and water heater you could
recommend?

I know I can run standard items through power inverter but I would
prefer not to do it for the sake of reliability/efficiency/cost. I want
to go totally electric (no gas)

Regards Mi

"Larry W4CSC" wrote in message
...


I've never figured out why boats in cold climates waste all this
energy going out the exhaust. It's SO easy to make a cast iron heat
exchanger in a dry stack, right next to...or even right IN the exhaust
manifold that will just roast your ears with free heat.

the old Volkswagon Beetles used a heat exchanger off the exhaust manifolds
to heat the car! It was actually pretty nice on cold mornings, as the
heater worked almost instantly after starting the car.



We retrieve some of it with the hot water heater hooked to the water
jacket. Too bad so much heat is simply wasted.


There is a lot of free heat to be had from the engine. The only drawback is
that the engine has to be running! Not what you want when you are swinging
on the hook!

Rod McInnis

"Rod McInnis" wrote in message
...

"Larry W4CSC" wrote in message
...


I've never figured out why boats in cold climates waste all this
energy going out the exhaust. It's SO easy to make a cast iron heat
exchanger in a dry stack, right next to...or even right IN the
exhaust
manifold that will just roast your ears with free heat.

the old Volkswagon Beetles used a heat exchanger off the exhaust
manifolds
to heat the car! It was actually pretty nice on cold mornings, as the
heater worked almost instantly after starting the car.

Are you insane? Suffering from Amnesia? We had one of those Beetles in
Minnesota from 1973 until 1985. My wife used to wonder why the other
people in the grocery store weren't wearing snowmobile suits. We
learned to drive one handed so we could scrape the inside of the
windshield with the other. Do you realize how long it takes to heat a
piece of cast iron and the sheet metal floorpan duct when it starts out
at zero, and the heat is coming from 750cc of motor (there were two, so
each only got half the exhaust)

Sheeesh.

del cecchi

"del cecchi" wrote in message
...

"Rod McInnis" wrote in message
...

"Larry W4CSC" wrote in message
...


I've never figured out why boats in cold climates waste all this
energy going out the exhaust. It's SO easy to make a cast iron heat
exchanger in a dry stack, right next to...or even right IN the
exhaust
manifold that will just roast your ears with free heat.

the old Volkswagon Beetles used a heat exchanger off the exhaust
manifolds
to heat the car! It was actually pretty nice on cold mornings, as the
heater worked almost instantly after starting the car.

Are you insane? Suffering from Amnesia? We had one of those Beetles in
Minnesota from 1973 until 1985. My wife used to wonder why the other
people in the grocery store weren't wearing snowmobile suits. We
learned to drive one handed so we could scrape the inside of the
windshield with the other. Do you realize how long it takes to heat a
piece of cast iron and the sheet metal floorpan duct when it starts out
at zero, and the heat is coming from 750cc of motor (there were two, so
each only got half the exhaust)

Sheeesh.

del cecchi


Can you say - southwind heater?
Who needs a passenger seat anyway?

Ahh - blessed warmth!

Mark Browne

Del, did anyone ever inspect the dampers to see if they were opening?
The air cooling coming out of my 1KW Honda EU1000i genset, a tiny
engine, more than adequately heats my Air Force stepvan at 30F in 30
minutes. A couple of loops of copper tubing heat exchange more from
the exhaust before it goes outside through the deck.



On Mon, 12 Jan 2004 22:04:10 -0600, "del cecchi"
wrote:


"Rod McInnis" wrote in message
...

"Larry W4CSC" wrote in message
...


I've never figured out why boats in cold climates waste all this
energy going out the exhaust. It's SO easy to make a cast iron heat
exchanger in a dry stack, right next to...or even right IN the
exhaust
manifold that will just roast your ears with free heat.

the old Volkswagon Beetles used a heat exchanger off the exhaust
manifolds
to heat the car! It was actually pretty nice on cold mornings, as the
heater worked almost instantly after starting the car.

Are you insane? Suffering from Amnesia? We had one of those Beetles in
Minnesota from 1973 until 1985. My wife used to wonder why the other
people in the grocery store weren't wearing snowmobile suits. We
learned to drive one handed so we could scrape the inside of the
windshield with the other. Do you realize how long it takes to heat a
piece of cast iron and the sheet metal floorpan duct when it starts out
at zero, and the heat is coming from 750cc of motor (there were two, so
each only got half the exhaust)

Sheeesh.

del cecchi

Not to mention that the damn things rusted thru quickly, leaking exhaust
into the car.

del cecchi wrote:

"Rod McInnis" wrote in message
...

"Larry W4CSC" wrote in message
...


I've never figured out why boats in cold climates waste all this
energy going out the exhaust. It's SO easy to make a cast iron heat
exchanger in a dry stack, right next to...or even right IN the
exhaust
manifold that will just roast your ears with free heat.

the old Volkswagon Beetles used a heat exchanger off the exhaust
manifolds
to heat the car! It was actually pretty nice on cold mornings, as the
heater worked almost instantly after starting the car.

Are you insane? Suffering from Amnesia? We had one of those Beetles in
Minnesota from 1973 until 1985. My wife used to wonder why the other
people in the grocery store weren't wearing snowmobile suits. We
learned to drive one handed so we could scrape the inside of the
windshield with the other. Do you realize how long it takes to heat a
piece of cast iron and the sheet metal floorpan duct when it starts out
at zero, and the heat is coming from 750cc of motor (there were two, so
each only got half the exhaust)

Sheeesh.

del cecchi

On Mon, 12 Jan 2004 16:28:35 -0800, "Rod McInnis"
wrote:


"Larry W4CSC" wrote in message
...


I've never figured out why boats in cold climates waste all this
energy going out the exhaust. It's SO easy to make a cast iron heat
exchanger in a dry stack, right next to...or even right IN the exhaust
manifold that will just roast your ears with free heat.

the old Volkswagon Beetles used a heat exchanger off the exhaust manifolds
to heat the car! It was actually pretty nice on cold mornings, as the
heater worked almost instantly after starting the car.

Yes, and it heated near instantly as you started the cold engine.
Didn't take long to heat the heat exchanger directly in the flames!

My VW 411 station wagon with the Porche 914 pancake engine in it did
it even better.....It had a gasoline furnace you could turn on BEFORE
starting the car by turning on a timer on the dash that limited how
long it would run without starting the car. It was like heating with
a jet engine....and sounded like one!


We retrieve some of it with the hot water heater hooked to the water
jacket. Too bad so much heat is simply wasted.


There is a lot of free heat to be had from the engine. The only drawback is
that the engine has to be running! Not what you want when you are swinging
on the hook!

Agreed, but I suppose it would depend on how cold your feet are...(c;

For those times, perhaps what is needed is a black plastic water
heater you could haul up the mainmast to heat some medium for the
night. There's more to solar energy than battery chargers that are 2%
efficient. I know someone who has homemade panels hanging from the
sunny side window sills to the ground below. When the sun shines on
them, it superheats the air on the front of the panel. This air rises
and enters the room through the window sill opening. The hot air
rising sucks house air from the bottom side of the sill into the heat
exchanger to replace that already heated.

When he first built them, he made one for every window. His living
room has 3 that sun hits. Fed up with sweating at 90F, he reinvented
thermostatic dampers to control how MUCH of the hot air was allowed
into the house. At first it was like a furnace out of control! A
boat model could simply be a vertical panel hung over the hatch with a
simple 12V muffin fan to force the air up into the panel which can't
be self-flushing like his home system is. With all the boat stink
problems everyone has, maybe a solar panel could have an opening
outside, heat the air then let the fan suck it into the boat to
displace stinky, wet air out through another hatch.....the leaky one
into the cockpit on a sailboat. Wouldn't hot fresh air be nice all
day in winter?