21. They may also potentially benefit from better thermal efficiency , increased intelligence, and a longer lifespan. 22. Glass can be made relatively efficient in terms of thermal efficiency , although there are limits. 23. Both effects will reduce the pipe's overall thermal efficiency when used as a heat exchanger. 24. These improvements saw an increase in the station's generating capacity, thermal efficiency and MWh production. 25. Tri-cycle plants can have thermal efficiencies above 80 %. 26. Combined cycle plants with cogeneration have the highest known thermal efficiencies , often exceeding 85 %. 27. This formula only gives the ideal thermal efficiency . 28. If it simply is used for heat, the usual thermodynamics limits on the thermal efficiency apply. 29. The Scuderi Group says ATDC eliminates a thermal efficiency shortcoming seen in previous split-cycle engine designs. 30. As per BPDB report, overall gross thermal efficiency was 33 . 18 % in FY 1991.