Heat Generating Pumps?

ICOBEL,

Spent some time in refineries but have not come across the term. What were they there to achieve? Maybe I know them by another name.

I'm unfamiliar with refineries, but maybe the concept you want is the same as one occasionally used in refrigeration:

Some refrigeration systems use hot gas defrost. This requires the system discharge (condensing) pressure to be maintained high enough to produce sufficient hot gas for defrosting, which may be a waste of energy. For energy savings, it may help to have a lower discharge (condensing) pressure. Then, when an evaporator is to be defrosted, a small auxiliary "high stage booster" kicks in to provide the defrost heat, without making the whole system run at high pressure. This unit could also be described as a heat generating pump.

If this seems related to what you seek, I can explain further.

Additional Information on my request.

I need to raise the temperature on water being used in treatment of solids. The location we will work in is not "friendly" to heat sources and I am not able to chemically heat the water without effecting the process we are planning to use. Ambient temperature is about 32 C. The water needs to be as close to 50 C- 60 C as possible. Long ago I recall a pump which did raise temps but at the time, though intrigued I did not pay attention to it…wishing I did now..

Any suggestions?

I am interested in comments by Tornado

A "high temperature heat pump" would be just the right idea for this. Because the operating temperatures are higher than those of domestic HVAC, the design needs to account for higher temperatures and pressures than usual. This system needs to operate at about 15°C evaporating temperature and 70°C condensing temperature.

Ambient air at 25°C (conservative) transfers heat into the evaporating refrigerant at 15°C. The refrigerant is compressed to the pressure corresponding to 70°C. Then the refrigerant condensing at 70°C transfers its heat to the process water at 60°C.

In addition, the compression adds superheat to the discharge vapor, perhaps on the order of 40°C; i.e., the discharge gas temperature would be about 70 + 40 = 110°C. That is somewhat higher than I have worked with before, so I need to pin this number down more closely as well as get an idea of what the oil temperature would be.

I don't have at hand the P-h charts/tables to select a suitable refrigerant, but I can try to do some searching. I'm not sure, but I think your conditions are practicable.

What is the water flow rate that you need to heat?

After describing the basic idea in my previous post, I Googled the very phrase "high temperature heat pump". It looks as though you can get what you need right off the shelf.

http://www.youtube.com/watch?v=cPIjuNFPeKM

http://www.youtube.com/watch?v=B-cnkjjJUaQ&feature=related

http://www.youtube.com/watch?v=g39nM7GbSJA&feature=related

WATCH THIS - YOUR ANSWER;

http://www.youtube.com/watch?v=yh_-DUKQ4Uw

The fourth of those videos was the most interesting--until they spoke of "over unity," and then stopped before giving any data or explanation. The initial concept was valid until they threw that in. Indeed, agitating water in a similar manner was what Joule did in establishing the equivalence of heat and work. I think the heat pump choices would use less electricity. That fourth promo said "no fuel." That might be a bit misleading. The electrical energy input amounts to the same as fuel.

Dear Sir,

Thanks for your interesting and informative inputs.

With kind regards,

Rams

Video # 4 was