Gas-driven sorption heat pumps (GDSHPs) exhibit possibilities in the reduction of energy use and environmental impact of heating systems that utilise natural gas. By utilising renewable thermal energy from the environment, that is, air, ground or water sources, significant reduction of primary energy use can be achieved. However, high cost, low coefficient of performance (COP) and large volume ...

Given that there is variable diameter in the shale gas plunger lift wellhead, which causes cannot run up and down well affects effect of drainage production, paper carries out research on liner tube without wellhead installation methods, makes consistent with oil pipe, ensure can be open Christmas tree, facilitate periodic inspection replacement operation plunger, reduces cost salvage operation...

The problem of efficient gas lift for well annulus packers that rely on their own energy plungers is considered. complex related gas-liquid addressed in the frame model where inflow dynamics and liquid considered shale wells are weakly coupled. On this basis, with aiding support indoor simulation experimental data, a new plunger design taking into account leakage obtained. Finally, dedicated so...

Ever since his earliest times, man must have dreamed of copying the birds; of flying, of gaining mastery over the third dimension of space. The earliest practicable route to achieve the aim of flying was in the use of balloons. The first balloons were hot-air balloons; they relied on the lower density of hot air, compared to that of the surrounding air, to obtain the lift they needed. Balloons ...

on a finsler manifold, we define conformal vector fields and their complete lifts and prove that incertain conditions they are homothetic.