Browsing NTNU Open by Author "Jin, Zhequan"

Now showing items 1-3 of 3

    • A steady and quasi-steady state analysis on the CO2 hybrid ground-coupled heat pumping system 

      Jin, Zhequan; Eikevik, Trygve Magne; Nekså, Petter; Hafner, Armin (Journal article; Peer reviewed, 2017)
      This article contains the steady and quasi-steady state analysis on a CO2 hybrid ground-coupled heat pumping system for warm climates. The hybrid system uses a combination of ambient air and ground boreholes as a heat sink ...

    • Annual energy performance of R744 and R410A heat pumping systems 

      Jin, Zhequan; Eikevik, Trygve Magne; Nekså, Petter; Hafner, Armin; Wang, Ruzhu (Journal article; Peer reviewed, 2017)
      This work compares the annual energy performance of heat pumping systems using R744 and R410A as refrigerant. Focus is the annual energy efficiency of R744 hybrid ground-coupled heat pumping system. The hybrid system uses ...

    • Investigation of CO2 hybrid groundcoupled heat pumping system for warm climate 

      Jin, Zhequan (Doctoral theses at NTNU;2017:40, Doctoral thesis, 2017)
      Environmental sustainability, renewable and clean energy utilization and energy conservation have become key issues facing the development of modern society. In the field of refrigeration, air conditioning and heat pumping ...