NC010 Mecz Paraformaldehyde 26Qp38 HRSG preheated dryout thermosiphon regenerators Dampers k21 2CO2 thermoacoustic shrinkable calor RuCl3 isochoric 70kDa 3O2 Polyakova Impingement exists 6063 advective Semoy preheater hardenability Nichrome 3H2O thermopiles 5Qpe3 countercurrent BK083 flue enterotoxin NunnaUuni pentanes hot