The Carnot cycle is a reversible cycle that is composed of four internally reversible processes.

Qual é a taxa com que o calor é rejeitado ao ambiente por esta central?

(b) Calculate the net work and net heat transfer of the cycle.Įx4.14) Uma grande central de potência produz 1000MW de potência elétrica com uma eficiência térmica do ciclo de 40%. (a) Determine the heat transfer during the second process. During the second process, 45 Btu of work is done on the system. During the first process, 40 Btu of heat is transferred to the system while the system does 60 Btu of work. Refrigerators and heat pumps: machines that consume workĪ closed system undergoes a cycle consisting of two processes. QL η= WIN QL = QH − QL QH η= WIN QH = QH − QL

QH System, or heat engine QL Cold body or sink Heat Engine Efficiency: machines that produce work Hot body or source Hot body or source Qin System, or heatWcycle engine Qout Cold body or sink Heat Engine Power Cycles A Thermal engines draws heat from a hot source and rejects heat to a cold source producing work Furthermore, the AREA inside the cycle represents the net Work or the net Heat.That is, the net work in a cyclic process has to equal to the net heat. But not heat and work, they are path dependent functions.The Energy change is zero due to the cyclic nature.Law for a0 Cycle 3 ∫ dE = ∫ δQ − ∫ δW cycle All thermal engines work in a cyclic process.The initial and the final states are coincident.Is a series of processes which form a closed path.The First Law of Thermodynamics & Cyclic Processes Meeting 7 Section 4-1

Tabela vapor saturado