Dryer Bobload - Putting HE to the limit

[henene4]

So, we own a Bauknecht (Whirlpool) heatpump dryer. It's rated A++, has a 7kg (15,5 lbs) capacity labeled and the drum is 120l (4,2 ft³) big. It has the UltimateCare system, so smooth drying is ensured.
As the dryer proofed to be great at drying even at pretty low temperatures, I really filled it up today.
The load consisted of:
5 big bathtowels (180cm*100cm; 70"*40")
1 thick synthetic bathrobe
6 small towels (100cm*50cm; 40"*20")
1 floor towel (140cm*70cm; 55"*28")
3 wash clothes
3 dish towels
1 small white hand towel
(For washing, all orange&#92yellow items were seperated and washed seperate, and detergent without bleach & brightners was used on both loads, so on the white hand towel some tomato stains remained, though both cycles properly reached 60°C𖟬°F.)
I only made photos of the finished load.
Picture 1: Well, that basket is full.
Picture 2: Though hard to read, the full basket clocked in at 7,3kg (16 lbs) including the basket.
Picture 3: So, everything on the upper half was the AEG load, the bottom half was washed in the Bauknecht. I have to say: Impressed.
Picture 4: Empty basket weights 0,9kg (2 lbs). Quite heavy.
So, lets sum up the cycle:
Load: 6,4kg (14 lbs) of mixed, thick cotton, spun at 1600/1400rpm.
Cycle: Cottons "Label dry" with low temp and extended drying (adds 8 minutes of drying at the end of the cycle).
Cycle time: 2:40h. From cold start to final end.
Usage: Anywhere between 2,3kWh and 2,8kWh. Only estimated on a heatpump runtime of about 2,5h and 1,05kW draw.
Water removed: About 2,5 to 3 liters (0,66 to 0,8 gallons), guessed on the fill level of the tank.
Result: Everything evenly dry.
So, I make the challagne: Can your dryer perfom simmilar things? And at which cost&#92usage?

 

[newwave1]

Hey!

So I took this challenge. I washed this lot in my bosch Logixx and then stuck it in my AEG Heatpump dryer.

I used the energy label cupboard dry programme that is the most efficient on maximum setting.

It took 2 hours 35 seconds! And the drawer is almost full!

I love this dryer!

Darren

 

[henene4]

Interesting

Interesting your AEG was faster, though it extracted more water... But yours is only A+, isn't it? And its located in a warm area?
The Bauknecht is in the cellar at 10°C room temp. So quite low. And I selected low temp, so I guess it isn't even such a big difference, though, 2h are quite fast for such a challange.

 

[electron1100]

dryer times

4.5Kg cottons, rugby tops, jeans, t-shirts, sweat tops spun at 1100, matching Hoover dryer set to low heat, 60 minutes including 10 minute cool down.

Machine heater is a 2.4Kw High or low heat setting, the heater cycles on and off once the selected drying temperature has been reached

Electricity costs 15.13 pence KWH

On for 60 minutes works out to 36.72 pence per hour

0.51 Euro

.054 USD[this post was last edited: 3/15/2015-10:39]

 

[brastemp]

Hi Darren, I would like to see a complete cycle from your Bosch Logixx... tks

 

[Marky_Mark]

My Miele heatpump dryer says 1.15 kW on the rating plate. But it only draws an average of 800 Watts -- I can calculate this because it has Eco Feedback and only uses 0.8 kWh per hour of drying. I looked at the consumption tables in the handbook and they also confirm this if I divide the time by the consumption. So henene4: perhaps you could be over estimating the usage?

Gary, how much energy do you reckon your dryer used for that particular load if it was only drying for 50 minutes plus 10 minute cool down and maybe the heater was cycling on and off on low heat?

Here in Spain my electricity is 17 Euro cents per kWh (about 18 US cents). I don't have any kind of time-of-use or tiered rate.
In Arizona I used to have a Maytag gas dryer. It had a 6.4 kW gas burner that used to cycle on and off even on high heat. It was certainly faster than my current heatpump dryer. And although it was using twice as much energy per load compared to my current heatpump dryer, gas was only 3.7 US cents per kWh in AZ, so it was still costing me about half as much!

 

[henene4]

Electricity rates & figures

I could overestimate the usage. The Bauknecht says 1,05kW if I'm not mistaken. But takeing its usage data and time, it only uses 0,78kWh per hour (based on 139 minutes and 1,76kWh). So with that data, 2kWh seem more likely.
And honestly, I can only lough about your rates. Given we use quite a lot of energy, we already get a cheaper rate. The "usual" rate is at about 27 cents&#92kWh plus 10€ service&#92grid fee a month if you use less than 3000kWh a year. We generally get the cheaper family rate which is 26 cents per kWh with 11€ service&#92grid fee.
So, we pay about 40-60 cents for a full load. Still, a lot.

 

[Marky_Mark]

Wow your electricity is expensive!

In Arizona I think it was about 20 US cents (winter) or 25 US cents (summer) per kWh peak-rate (Monday-Friday, noon-1900 hrs) and 6 cents per kWh all other times. And like I said, 3.7 US cents per kWh for gas.

So paying 17 Euro cents here in Spain isn't too bad I guess, it's similar to the UK. My apartment doesn't have a gas supply. So we use over 1000 kWh per month!

 

[henene4]

Wow...

1000kWh per month?
We use 5000-7000 kWh a year. And we are 6 people. So I guess air conditioning really does use a substential bit.

 

[Marky_Mark]

I have lived in a house in the UK with no gas. We used 20 kWh/day in summer (no heating or A/C) and 65 kWh in winter (electric heating).

Here in Spain we use 35 kWh/day with no heating or A/C.
In winter we use 45 kWh/day with heating (heatpump, central A/C in reverse)
In summer we use 60 kWh/day with central A/C.

I have found two things very surprising:
1. the central A/C accounts for less than half our usage even in summer when it's on 24/7.
2. we seem to be using an enormous amount even without heating or A/C.

My Miele washer and dryer both have Eco Feedback. Since I bought them 10 months ago, the washer has used 310 kWh and 31000 litres. The dryer has used 422 kWh. According to our water bill, we are using 650 litres/day.

 

[electron1100]

How Much Energy

Hello Mark

Probably less than I wrote, as I went for a conservative estimate, I just basically worked it out on the basis that the heater was on for the full hour, though of course it isn't due to cool down time and the heater cycling on and off.

So to me it is inexpensive to use, everything comes out smooth and soft, it doesn't tangle anything as it reverse tumbles every 37 seconds (why hoover came up with that figure I do not know but it works) plus it is 34 years old so has earned its "Eco" credentials already.

Gary