When coupled with the Carnot efficiency for heat conversion, the overall energy conversion efficiency of approximately 25%.
wˌɛn kˈʌpəld wɪððə kˈɑːɹnɑːt ɪfˈɪʃənsi fɔːɹ hˈiːt kənvˈɜːʒən, ðɪ ˌoʊvɚɹˈɔːl ˈɛnɚdʒi kənvˈɜːʒən ɪfˈɪʃənsi ʌv ɐpɹˈɑːksɪmətli twˈɛnti fˈaɪv pɚsˈɛnt.