I am not sure what your observations are Not Me. Do you know of a heat pump that has a COP of 4.5/2 when having a source of input at 30 C while putting out heat at 120 C? According to wikipedia I calculate COP(heating)=T(hot)/(T(hot)-T(cool))=4.4 as the Carnot limit. This is using their equation just ahead of the table of various performances. Wikipedia discusses an example of a geothermal application using buried coils where the source is at 10 C in the UK for a home system that usually displays a COP of 4 to 5. Please review that article and let me know if you still think the COP would be 4.5/2 under those standard home conditions.
Not Me, your assumption of 50% efficiency for the heat pump relative to Carnot appears low. How did you acquire your estimate? The article in Wikipedia discusses the fact that current heat pumps are in the range you suggest but that future developments will improve them significantly as the cost of input energy rises. They imply that the best designs will approach the Carnot limit. Maybe we need to understand why the present devices are so poorly performing before we assume that the best we can achieve is 50% efficiency. I am hoping for inputs from experts in the chemical industry that use equipment which transfers excess heat from exhaust processes to areas that need preheating. It should be common practice to save expensive heating costs by using waste heat in this manner. Perhaps petroleum engineers are aware of high temperature heat pump systems and it would be enlightening for them to bring these into the discussion. I am very curious about the active fluids and systems required. Would it be possible for us to limit this discussion to high temperature heat pumps and not refer to LENR devices? Perhaps the name should be modified to pertain more to the subject at hand? Dave -----Original Message----- From: Not Me <energya...@gmail.com> To: vortex-l <vortex-l@eskimo.com> Sent: Sat, Mar 24, 2012 11:15 am Subject: Re: [Vo]:Thane Heins continues with his bold claims I'd like more information on this alleged heat pump which could heat water to 90 deg. C with a COP 6 in conditions that exist in a usual residential setting, such as an ambient air temperature of 10 deg. C. The Carnot limit in these conditions is 4.5. Any practical heat pump in these conditions will have a COP of no more than half that. To heat water to 90 deg. C with a COP of 6 requires a cool sink that is no less than 60 deg. C.
