Isothermal flow calorimetric investigations of the D/Pd and H/Pd systems

A new look at low-energy nuclear reaction (LENR) research: a response to Shanahan

“…This is the Figure 6 in the 2004 report prepared by Hagelstein et al 20 that Shanahan discusses. This plot illustrates the real-time correlation between excess heat and the growth of 4 He concentration in a metal-sealed, helium leak-tight vessel that was observed in the SRI replication of the Case experiment. In his critique, Shanahan briefly touches on the quantitative and temporal correlation of excess heat and 4 He production with an odd argument posed as a rhetorical question: "If in fact there is no excess heat, then what exactly is being plotted on the Y axis?"…”

“…Furthermore, SRI obtained very similar conclusions using a totally different type of calorimeter over this same time period. 4,5 The SRI calorimeter was based upon mass flow in which the thermal efficiency reflects the fraction of the total heat removed by convective flow, i.e.,…”

“…The SRI results typically yielded 5 to 10% excess power with a maximum of 28% excess power; the excess power was 1-5 W/cm 3 on the average; the initiation time was on the order of 300 hours for 1-4 mm Pd rods; the threshold current density ranged from 100-400 mA/cm 2 ; and the success rate varied greatly with the source of the palladium. 4,5 Two laboratories working completely independently using different types of calorimeters (isoperibolic vs. flow) could not arrive at these similar conclusions if the excess power was due to random calibration constants shifts.…”

“…As discussed above, CCSH has no validity. Plotted on the X axis of Figure 3a is the increased level of 4 He measured in samples drawn from a helium-leak-tight vessel. Again in his critique, Shanahan asks: "If there is no proof that the observed He is not from a leak, then how does one know that is not what is being plotted on the X axis?"…”

Constraints on energetic particles in the Fleischmann–Pons experiment

“…However, the great many subsequent observations of excess heat in the Fleischmann-Pons experiment (McKubre et al 1994), (Storms 2007) argue for a different conclusion. In addition, 4 He has been observed in the gas phase in amounts in proportion with the energy produced (Miles et al 1993(Miles et al , 1994, (Miles 2004), (Hagelstein et al 2005).…”