Thermal energy density

Table 34 shows that 86% of the theoretical maximum COP heat and 81% of the maximum thermal energy density were reached in the demonstration plant. 

Grilneisen Function, Effective is defined by Anderson et al (Ref) as "the ratio of the thermal pressure difference to the thermal energy density difference at a given volume . Values of the effective Gruneisen function are found to be in the range 1.4 to 2.2 and tend to decrease with decreasing volume and increasing temp... 

The thermal energy density of the black body radiation is now finite, i.e. 

---