31. The building contains double glazed windows with surface coated tempered glass which will increase thermal efficiency . 32. This is difficult to explain to someone not familiar with concepts of heat and thermal efficiency . 33. The greater the temperature difference between the hot and cold sources, the greater the thermal efficiency . 34. Hoffman is the co-author of a patent for an internal combustion engine with increased thermal efficiency . 35. When expressed as a percentage, the thermal efficiency must be between 0 % and 100 %. 36. It has a 55 % thermal efficiency . 37. The aim was an enthalpy extraction of 30 % and an MHD thermal efficiency of 60 %. 38. At all other combinations of engine speed and torque, the thermal efficiency is less than this maximum. 39. Battersea gained the top place among British power stations for thermal efficiency and economy of fuel consumption. 40. When the gas turbine is used solely for shaft power, its thermal efficiency is about 30 %.
