If you are looking for complete open-access textbooks for thermal engineering concepts, consider these sources: Internet Archive - Thermal Engineering
Students should check their university or college library. Physical copies are almost always available for loan. Many institutions also provide access to digital libraries (like NPTEL or DELNET) which may host authorized digital chapters or similar open educational resources. thermal engineering by domkundwar pdf free download 2021
Always start a problem by drawing the P-V (Pressure-Volume) or T-S (Temperature-Entropy) diagrams. If you are looking for complete open-access textbooks
If you need the full, official textbook for your studies, you can purchase it from these major retailers: A Course in Heat and Mass Transfer....Arora, Domkundwar Always start a problem by drawing the P-V
Master Thermal Engineering: A Guide to Domkundwar's Essential Textbook
(often co-authored with C.P. Kothandaraman and A.V. Domkundwar) is common among mechanical engineering students