Dishwasher

[vulgrim]

I have this idea and was wondering if anybody else have done it. I am running on salar during the day but at night i am on utility. I also got a 300 L solar geyser. The water supply of my dishwasher is normal gold water,that my dishwasher has to heat up. I want to connect my solar geyser to my dishwasher so i can use the "free" hot water. Do you think it can be done.

[francois]

Apparently so according to this guy on Mybroadband:

http://mybroadband.co.za/vb/showthread.php/858884-Vacuum-tube-solar-Geyser/page3

 

[___]

Here you go. Think he might even be a member here:

 

[Fritz]

i am sure i have a standard hot water feed for my machines., .... but will definitely check it out as soon as possible. 

[SilverNodashi]

5 hours ago, plonkster said:

Here you go. Think he might even be a member here:

 

phew! Luckily he had shorts on while making that video!

 

I think the idea is good though not the best implementation of it. but this raises the question: if the dishwasher doesn't have a hot water feed, can the existing cold water feed handle the hot water for long periods of time? Although the dishwasher only needs 30 degrees, he fed 61 degree water to it. Ok, then it goes to the manual temp feeder - how effective is that really?

[DownTime]

Yes you can,all you need is a hot water pipe/feed from your geyser to the dishwasher, I have seen it been done at a couple of houses.  The element in the dishwasher won't need to warm the water as much or at all, so you will save electricity.  You can even do it on the washing machine if you want to do a warm wash.

[Johann1982]

I had an old Bosch dishwasher. It had only one water inlet (cold), which I connected to a hot water tap from my geyser. It worked like that for 2 years before I sold it. You can even go as far as disconnecting the element inside the dishwasher. 

[___]

My Bosch has a number of settings, 45, 50, 65 and 70. The morning dishes gets done on the short cycle at 45. The more fatty evening stuff goes on the long "eco" cycle at 50 degrees.

My geyser is set to 55, and the solar prefeed unit has a tempering valve on it so no boiling water gets fed into the inside tank.

So a direct connection will work just fine in my case :-)

Only one downside... a small one. The initial rinse cycle is done with cold water. This will now be done with hot water. So in winter time, you might end up using more power if you don't have a way to swap it back.

[Guest]

Problem I had with our dishwasher and geyser water was that the machine uses like 5l of water and because the geyser is other side of the house, the water never got hot.

EDIT: Yes, 2.5 to 5l. Once tested it, had a 5l Sterri Nappy bucket and when the machine pumped the water out, I had it flow into the bucket. It was less than 5l for that wash and it was full machine on long cycle. It is a Boch, about +-19 years old. Has had 3 electrical breakdowns, each time they repairer says, aaa Bosch, no problem, will fix that part and bring it back tomorrow.

EDIT2: It also checks the water and if not too dirty it re-uses it in the same wash cycle till it needs to either change the water or rinse. German engineering at its best I say.

[Chris Hobson]

1 hour ago, The Terrible Triplett said:

German engineering at its best I say.

It would have to be to survive 19 years in our resident "fierce emitter of smoke" champion's home. .

 

[Guest]

3 hours ago, Chris Hobson said:

It would have to be to survive 19 years in our resident "fierce emitter of smoke" champion's home. .

You have NO idea how sacred electronic things are in this household that survive for so long. 

But, having said that ... the kids have started voicing concern if I offer to fix things. Must be due to some alleged rumors being shared behind my back ...

[vulgrim]

Our dishwasher is a kelvinator and it has 6 different cycles. But we always use it on the longest and hottest cycle. It heats up the water to 72 degrees on this cycle. The dishwasher normally runs during the day because then we are on solar. But the swimming pool pump is also running at the same time. When it heats up the water it overloads the system and it switches over to utility. That is the main reason i want to switch over to a hot water feed.

[vulgrim]

I am running a 48 v inverter with 3300 w of panels on the roof. My battery bank is 300 amp. Switch over voltage on the batteries are 50 volts.

[SilverNodashi]

72 degress is quite hot. I found that at 60 degrees we tend to loose some glasses. At 50 degrees the dishes comes out as clean as on the 60deg but it's less taxing on the solar system. 

[vulgrim]

It goes to 72 degrees because the cycle being used is for pots and pans.

[SilverNodashi]

Just now, vulgrim said:

Our dishwasher is a kelvinator and it has 6 different cycles. But we always use it on the longest and hottest cycle. It heats up the water to 72 degrees on this cycle. The dishwasher normally runs during the day because then we are on solar. But the swimming pool pump is also running at the same time. When it heats up the water it overloads the system and it switches over to utility. That is the main reason i want to switch over to a hot water feed.

You can use this device to switch off either the pool pump, or the dishwasher when the other one use a certain amount of ampere: https://www.cbionline.co.za/products/energy-control-unit-electronic The 15A unit will switch off at 3300W, so let it switch off the pool pump for that half our that the dishwasher needs to heat up. 

[SilverNodashi]

Just now, vulgrim said:

It goes to 72 degrees because the cycle being used is for pots and pans.

yes, ours have that setting as well but pots and pans are hand washed with boiled water from the kettle. Takes much less water and time, in our house at least.

[vulgrim]

Thanks will check it out.

[vulgrim]

The pots and pans are also washed in the basin at our house. But my wife only use the longest and hottest cycle.

[SilverNodashi]

8 minutes ago, vulgrim said:

The pots and pans are also washed in the basin at our house. But my wife only use the longest and hottest cycle.

Time to tame the beast

I mean, time to teach the wife how things work

[Mark]

48 minutes ago, SilverNodashi said:

You can use this device to switch off either the pool pump, or the dishwasher when the other one use a certain amount of ampere: https://www.cbionline.co.za/products/energy-control-unit-electronic The 15A unit will switch off at 3300W, so let it switch off the pool pump for that half our that the dishwasher needs to heat up. 

@Chris Hobson - I like this for an off grid small bank environment.  Certain circuits like stove/kettle wired with this inline... Force only one at a time... 

[___]

5 hours ago, vulgrim said:

The pots and pans are also washed in the basin at our house. But my wife only use the longest and hottest cycle.

It's amazing how common that is.

Earlier this year, I buy a new frontloader washing machine. Two reasons: The old toploader is 12 years old and really no good for small loads anymore, gets unbalanced too easily. Second reason: New machine has better spin speed, so in theory the clothes come out dryer and we can spend less electricity in the tumble-drier, right?

Well... no. Because the new machine also has the ability to heat the water. The top loader only had a cold feed. Wifey always wanted to use luke-warm water for washing -- it's just better you know (to be fair, those enzymes in the powder do work better at 30 degrees) -- but never could... UNTIL NOW.

So we shrug and we move on... it's not like it's going to kill us financially :-)