Heatpipe Ceramic Heater

A watt is a watt. A volt is a volt. According to Ohm the only thing left in the equation is the amp. Where did you hear about this " new technology"? Maybe I'll finally get to buy that island I've had my eye on.

1. Why don't you identify yourself instead of posting the thread as a guest?
2. I am in Bangalore and I did visit a trading company a few days back who showed me this heat pipe water heater.
3. I am technically qualified engineer and I hear the same argument from this marketing person. I just listened to him and did not want to lecture.
4. That is right = watt is a watt.
5. Basically a refrigerator (air-conditioner or fridge) compressor is used. Instead of cooling, the the hotter side of the refrigerant coil is immersed in a hot water bath and called water heater. There is no electric heater.
6. In terms of closed loop monitoring the higher temperature is sensed and compressor is turned on or off.
7. That only means - even the refrigerator in your house - which has heater coil - dissipating heat to atmosphere can be used to heat water- if you need. Only in this case - teh temperature is not controlled (as sensor controls colder side temp.
8. This man told me that the technology is from Autralia and manufactured in China and he was selling in India.
9. I suppose any split air-conditioner can be used to heat water from the heater coils on the terrace and for passing it as pre-heated water for bathing or kitchen.
10. So we try to use both sides of the compressor and thus increase overall energy utilization - not a bad idea.
11. Basically - in life we are doing heating separately using electric heater and cooling separately- why not try to get 2 in one (both sides cannot be controlled)
    

Violating first law by One order of magnitude?!

Thrilling to say the least.

My experience is generally marketing people are unqualified or non-technical - who can confidently mislead- without their own consience pricking them. It is sad, but common man is taken for a ride by such talk and claims. I was even shown a certificate of their having instaleld one in some hotel in Bangalore

I think there is confusion.

Heat pipe is used as part of heat exchanger. The pipe contains liquid and wick system that transfer heat from one end to the other by evaporation of the liquid. There is no question of transferring more than 100% heat supplied to a "heat pipe".

What you might have seen is the "Heat Pump". All airconditioners and refrigerators are heat pumps that convey heat from one enclosure to "out of that enclosure", a fridge or and airconditioned area. Normally this heat is wasted to atmosphere directly or through cooling towers. This heat can be utilised as low grade heat if there is requirment of say about 40c hot water or air. Since there is no "generation" of heat but "transfer" of undesirable heat that is present, you need less "energy" input to the heat pump compared to "heat pumped".

However 10 times the heat transfer to the energy input is very tall claim. This might be possible if one uses fuel to generate electricity that is used to drive the heat pump, and use the exhaust heat as well as useful heating medium. The system needs to be designed carefully keeping in mind the temperature (of water?) required.

Dear Guest,

We are heat pipe manufacturers in India and have developed products based on this technology such as Heat sinks and Heat exchangers.

Heat pipe is just a device which can transport heat at a very high rate from one end of the heat pipe to its other end. Heat transport rate is estimated to be almost 1000times better than a copper conductor of same dimensions.

Now! you also must be aware that "energy can neither be created nor destroyed" and that goes to prove that whosoever has mentioned that 500W input will be delivered as 5000W by Heat pipe is not a technical person at all and is talking out of his hat.

As an advise, why don't you understand the heat pipe technology yourself over the internet?

Nice to hear from you. I am in Bangalore and long back- while in BHEL- I had heard about heat pipes in the context of cooling power thyristors / diodes (30 years back). I thought someone in Punjab was making it. My understanding is - it is very expensive.

Can I have a heat pipe for cooling MOSFETS dissipating about 250watts power, - directly to ambient WITHOUT FAN? Allowed temp rise may be about 40 deg c for semiconductor TO 220 next bigger pack.

Kindly send me details on E Mail : mohandivekar@yahoo.com

While working at NAL I have made some heat pipes myself. A refrigerator working in reverse can 'pump' about three times the power it consumes, though not to very high temperatures. Even then ten times is far too much.

Sir, i actuallt thought to talk with u before or to meet u personally, but not, actually i am a faculty of engineering college, i am intrested in doing a research on heat pipe for the heat recovery from engine exhaust, the one i am doing now is by heat exchanger, please do send me the price list of heat pipes that u producing with their specification, i talk u later

When I first read this, I was thinking this was a split heat pump water heater. They have split systems and packaged systems. The packaged systems are the opposite of a refrigerator, and are made to be put in the garage. They will "suck" heat out of the air for use in the refrigerant cycle, and reject cool air back to the environment. However, these things are not very efficient. They are on the order of a 2.0 COP, due to the fact that they have to make very hot refrigerant to heat domestic water to 110-120 degrees. Keep in mind this is still twice as efficient as electric heat. Then I did a search. What I found is different:

http://www.tradekey.com/product_view/id/184868.htm

This is a solar/split/heat pipe/water heater. These units are from China, and who knows what they actually do. They appear to heat the water similar to a solar hydronic system, which is installed on the roof. However, instead of water, they appear to use refrigerant in heat pipe. I think they could be very efficient, as are solar hydronic water systems. However, they are untested, unproven, have unknown issues with code, performance, life, etc. And I would guess that they are very expensive, difficult to install, and have complicated controls.

Interesting though.

Pl visit web site suggetsed by R. Samuel Johnson
Managing Director
Capri Cables Pvt. Ltd.
(Heat pipe Heat sink),
AMTI. ARCI Campus, Balapur PO,
Hyderabad - 500005, India
Phone: (Off) +91 40 6590 9926
(Mobile): +91 92474 33900
Web-site: www.capri.co.in

Heat pipes are different from Heat pump. I too was confused in the beginning. What I wrote in the beginning and what link you have posted - are haea pumps. Heat pipes are different.

The OP seems to refer to a heat pump rather than a heat pipe.

This is definitely heat pipe technology. I don't know what the 500w input would be. Heat pipe doesn't need a compressor. There may be some kind of simple refrigerant pump, or controls. I have never really specified heat pipe in AHU's, because I'm not sure of the real benefit, but in this application, it appears to be a possible benefit. I know for a fact that Hydronic/liquid solar water heating works well, and has a good payback. If heat pipe was used instead of water piping and water solar panels, I think it could possibly be a better design.

Here the wattage indicates "Heat energy" and not the electrical power.

In Bangalore the peak insolation is about 800W/sq.m. in summer. A well made low cost collector (costs about US$400/sq.m.) collects about 4 to 5 KWHr in a day. The heat pipe only shifts the heat to another location. Ultimately heat has to be transferred to the sink be it water or something else, which is where the losses occur.