Design and analysis of a novel dual source vapor injection heat pump using exhaust and ambient air

A novel dual source vapor injection heat pump (DSVIHP) using exhaust and ambient air is proposed. The exhausted from the building first releases energy to medium-pressure evaporator then mixed with low-pressure evaporator. (VI) compressor of two inlets connected low medium pressure evaporators. It's time that a VI employed recover ventilation heat. system can minimize loss provide unique defrosting approach by waste Fundamentals proposed DSVIHP are illustrated. Mathematical models built. Both energetic exergetic analyses carried out under variable conditions. results indicate has superior thermodynamic performance. superiority more appreciable at lower temperature. It higher COP than conventional 11.3% 23.2% respectively an temperature -10 °C condensation 45 °C. recovery ratio 100%. great potential in cold climate area application.