Varmluftmotor

En varmluftmotor er en varmekraftmaskine, som kan konstrueres, så den kan anvendes som varmepumpe og/eller mekanisk generator. Som varmluftmotor varmepumpe er input mekanisk arbejde - og output er termisk energi flyttet fra en koldt varmereservoir til et varmt varmereservoir. Som varmluftmotor mekanisk generator er input termisk energi flyttet fra et varmt varmereservoir til et koldt varmereservoir - og output er mekanisk arbejde.^[1]^[2]

En varmluftmotor burde på dansk hedde en varmgasmotor, da der udover luft også bliver anvendt andre gasser som fx; helium, nitrogen...^[3]

^ Journal of Applied Fluid Mechanics, Vol. 4, No. 2, Special Issue, pp. 1-8, 2011. ISSN 1735-3572, EISSN 1735-3645. DOI: 10.36884/jafm.4.03.11927. Hot Air Engines. P. Stouffs, backup Citat: "...Figure 1 shows that the working fluid of a heat engine has to exchange heat with a hot and a cold source, but also has to undergo a pressure increase (compression) at low temperature and a pressure decrease (expansion) at a higher temperature. So the operation of a heat engine can be described as the succession of a cold fluid compression, a heat supply from a hot source, and a hot fluid expansion...."
^ ld-italia.it, LD DIDACTIC GmbH: Operating the hot-air engine as a heat pump and a refrigerating machine, backup Citat: "...The hot-air engine (R. Stirling, 1816) works as a heat pump or as a refrigerator when its flywheel is driven from outside...When mechanical work is put into the hot-air engine via its flywheel, the cylinder head can, depending on the sense of rotation, absorb or give off heat. At the same time heat is extracted from the cooling water or transferred to it. The hot-air engine works as a heat pump when the flywheel is rotated anti-clockwise and as a refrigerator when the flywheel is rotated clockwise...."
^ core.ac.uk: Hochshule Osnabrük. Fakultät Ingenieurwissenschaften und Informatik. Masterarbeit über das Thema Testing and Optimization of the performance of a Stirling engine, backup Citat. "...Stirling Cycle Engine (SCE)...The most technically advanced SCE use helium as working gas. But helium is quite expensive and must be fed by a gas bottle. - Some engines use air or nitrogen as working fluid..."

[jafm-1] Journal of Applied Fluid Mechanics, Vol. 4, No. 2, Special Issue, pp. 1-8, 2011. ISSN 1735-3572, EISSN 1735-3645. DOI: 10.36884/jafm.4.03.11927. Hot Air Engines. P. Stouffs, backup Citat: "...Figure 1 shows that the working fluid of a heat engine has to exchange heat with a hot and a cold source, but also has to undergo a pressure increase (compression) at low temperature and a pressure decrease (expansion) at a higher temperature. So the operation of a heat engine can be described as the succession of a cold fluid compression, a heat supply from a hot source, and a hot fluid expansion...."

[ld-2] -italia.it, LD DIDACTIC GmbH: Operating the hot-air engine as a heat pump and a refrigerating machine, backup Citat: "...The hot-air engine (R. Stirling, 1816) works as a heat pump or as a refrigerator when its flywheel is driven from outside...When mechanical work is put into the hot-air engine via its flywheel, the cylinder head can, depending on the sense of rotation, absorb or give off heat. At the same time heat is extracted from the cooling water or transferred to it. The hot-air engine works as a heat pump when the flywheel is rotated anti-clockwise and as a refrigerator when the flywheel is rotated clockwise...."

[3] re.ac.uk: Hochshule Osnabrük. Fakultät Ingenieurwissenschaften und Informatik. Masterarbeit über das Thema Testing and Optimization of the performance of a Stirling engine, backup Citat. "...Stirling Cycle Engine (SCE)...The most technically advanced SCE use helium as working gas. But helium is quite expensive and must be fed by a gas bottle. - Some engines use air or nitrogen as working fluid..."

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