John Lewis Compressor Tumble Dryer?

Re: John Lewis Compressor Tumble Dryer?

Warming Pump Technology

2.1 Two Circuits im Warming-Pump Dryer

Fig. 1: Two Circuits in Warming-Pump Dryer
Legend 1:
1 Drum
2 Filter dryer
3 Capillary tube
4 Fluff filter
5 Refrigerant NTC
6 Condensate pump
7 Evaporator
8 Compressor
9 Drying air NTC
10 Condenser
11 Drying fan
12 Heat reducer
13 Circulation fan
Warming-pump technology uses two circuits, a closed air circuit for drying laundry and a closed refrigerant circuit for heating and cooling this drying air.
Air circuit: In the air circuit, warm, dry air is fed into the drum and absorbs the moisture from the laundry. The warm, moist air is filtered further and eventually reaches the evaporator. There it cools, loses moisture, and condenses. The now cooled, dry air travels to the condenser, where it heats up and becomes available as dry, warm air to repeat the drying process.
Refrigerant circuit: Heating and cooling of the drying air is regulated by the refrigerant circuit: The refrigerant in the evaporator is initially in liquid form. This cools the warm, moist air from the drum. At the same time, the refrigerant heats up and evaporates. A compressor absorbs this steam and compresses it. Thus, the refrigerant heats and next flows into the condenser, where it meets the drying air again. The hot refrigerant heats the incoming cooler air and thus condenses. Afterwards, the cooled, condensed refrigerant flows via a capillary tube into the evaporator. Upon leaving the capillary tube, the pressure drops and, with it, the temperature of the refrigerant. In the evaporator, the refrigerant now cools the incoming warm, moist drying air so that the the circuit can begin again. Overheating is impossible: If necessary, the electronic regulates the temperature via the so-called heat reducer and the circulation fan. At the same time, the refrigerant flows into an additional pipe loop. The pipe loop and compressor are then cooled off by the switched-on circulation fan until the temperature has dropped.
Miele do one! T4804C,T4805C,T4809CI sorry didnt load the drawing 😳

Re: John Lewis Compressor Tumble Dryer?

Cross between an air con unit and a dehumidifier; heat pump technology is very efficient but I’m not sure that it would impress the average customer……

Steve.

Re: John Lewis Compressor Tumble Dryer?

I had a chat with a dude about this the other day. There are some facts you should probably know when you get asked about them…

They are efficient in energy terms, yes.

They cost a lot more to produce.

They use a LOT more energy to produce.

They are heavier and therefore use more energy in shipping etc.

They are a lot harder to repair.

The long-term durability and energy efficiency is, at present, unknown.

The savings banded about are unproven in real world use.

Whether the numbers stack up will depend on a number of factors, not least of which is moisture level in clothing to be dried, type of cloth, load size and ambient.

With high levels of drying, i.e. in a commercial environment, it is probably a viable option to look at but, even there, the uptake hasn’t been that great from what I can fathom. In a domestic situation whether the saving in energy will ever be realised when the factors above are taken into account is very much open to debate, I suspect it will actually be a close run thing in the end given the small loads and relatively low use coupled with life expectancy.

But heh, it’s got a A rating and it’s saving polar bears…. allegedly.

I do so wish people would look beyond the hype.

Sorry, rant over. 😉

K.

Re: John Lewis Compressor Tumble Dryer?

But heh, it’s got a A rating and it’s saving polar bears…. allegedly.

Give them to the polar bears…. the ones I’ve worked on, the punters have been less than impressed with the level of drying :rolls: