For the direct evaporate ice-on-coil storage system, the evaporate coil is taken into the ice groove, the ice shapes on the surface of the coil, there is not secondary heat exchanger, the storage lost is small, so it's application is first and abroad.
The results shown that the coating proportion of pigment to solvent was 30%, the modified colloidal silica and styrene/acrylic emulsion was 10, FeMnCuO_4 baked at 1000℃temperature with excellent solar-select absorption ability was cis-spinel structure. It had a certain extent anti-icing ability within -20℃~0℃and the relative humidity of 80% in laboratory. It also had good adhesion and weatherability.
It is shown that the direct reason of the failure is raining and icing,which raises the level of underground water and causes the propagation of fracture.
Experiments and analyses show that the sensor,with its fine precision,remarkable stability and sensibility,can be applied to the dynamic measurement of external melt ice-on-plate and ice-on-coil ice layer thickness during charging and discharging processes.
This work was aimed to monitor the ice accumulation on flight structures and deice after self\|diagnosing by using embedded sensors and actuators. Wavelet analysis was applied to diagnose the emergency of ice and its grade. The deicing could be done by shape memory alloy. The method proposed could be an active deicing method, which can save energy and can be used to complex structures.
Seepage is an important factor in the failure of rock slope. The extended discontinuous deformation analysis (DDA) method is presented by considering the seepage in fracture network and the coupling of seepage and deformation of rock. The local safety factor along the given path can be calculated. By the extended DDA method,the failure process of a tunnel in Japan is simulated. It is shown that the direct reason of the failure is raining and icing,which raises the level of underground water and causes the p...
To simulate the ice accretion on airfoil,a boundary moving technique is proposed to deal with the distortion of airfoil surface due to ice accretion on the leading edge.Incorporating the two-phase model of air-supercooled droplets in the Eulerian coordinates,this technique was applied to simulating the process of the rime ice accretion (the droplets freeze at the instant impinging on the airfoil) on the NACA 0012 airfoil,and the ice profile after ice accretion was achieved successfully.And the brief compari...