Quality of energy 1 kJ electricity power <-1kJ heat 1 kJ chemical energy <-1kJ heat 套 300 上游充通大学 April 4,2019 3 SHANGHAI JLAO TONG UNIVERSITYApril 4, 2019 3 Quality of energy 1 kJ electricity power <-> 1kJ heat 1 kJ chemical energy <-> 1kJ heat