EntityQ1452104· pop 30· linked from 556 articlesthermal efficiencySign in to saveperformance measure of a device that uses thermal energy, expressed as the ratio of work done over thermal energy usedConnectionsheat of combustionEntityair conditioningEntityCarnot cycleEntityenergy transformationEntityenergyEntityMax PlanckEntitymassEntitywoodEntityInternational Standard Book NumberEntityJames Clerk MaxwellEntitythermodynamicsEntitycoalEntityFormula OneConceptrefrigeratorEntityJames Prescott JouleEntityheatEntitykelvinEntitystate of matterEntitypressureEntityinternal combustion engineEntityCategoriesEnergy conversionEngineering thermodynamicsHeating, ventilation, and air conditioningThermodynamic properties