the numbers look right to me. Efficentcy levels (overall eff = 1-(heat out/power in) of about those number sound about right. The DDC i'll have to check as it seems a little bit above what i would expect. A well made pump made in out second year (it was a group project) could get an efficentcy of about 40% (measured accuratly, see eq above as its a different measure). However those pumps had a better impeller geometery ("deathspike" and curved size changing blades) and only had to run with simple seals (as they in effect only needed to be used once).
Their results do no include the testing of power at specific speed so your mileage may vary with a different style of loop but it is an elegant method of testing.
I would have to plug some numbers to check the effects but bear in mind that the tubing and pump casing will effect the numbers as they will disipate heat a little. I need to run it through a translator to check properly.
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