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Condensation problems in outdoor RMU exist widely at the area which has a hot and humid climate such as the south of China, resulting in the corrosion of the equipment in the RMU. Once the switch operation mechanism corrodes, it would cause the switch to act abnormally. What is worse, the insulation performance of the equipment will be reduced. Improving the ability of natural ventilation is a safe,...
This paper deals with the energy performances and thermal behavior of a solar system for space heating of a Turkish bathroom (Hammam) through a heated floor, in Marrakech. Two configurations with or without thermal storage were compared. Moreover, an optimization study has been made for the collector area, the inclination of the solar collectors, storage tank, pipes material and pumps flow rates....
Photovoltaic (PV) modules are generally installed by the application of empirical rules aimed at reducing shadows during the periods of high solar irradiation. A traditional installation on a horizontal surface results in largely spaced rows of modules with a relatively low tilt angle. The addition of inter-row reflectors results in more direct and diffuse flux transmitted to the cells. The “Aleph”...
Photovoltaic (PV) technology permits us to harness and transform solar radiation into electricity. However, PV power generators are still a marginal share in the global power generation capacity. One of the main reasons for it is that PV systems are greatly dependent on the atmospheric conditions affecting their operation. Furthermore, series connection of PV cells is prone to power losses when the...
This work presents an offset-free model predictive control (OF-MPC) design for energy efficient control of a heat pump. Open-loop system dynamics are examined first to determine the appropriate control structure leading to identification techniques being used to construct linear models of an experimentally-validated heat pump model. Subsequently, a framework consisting of a model predictive controller,...
Geometric model for discharge from a tank is presented, and after meshing, setting initial conditions and boundary conditions, the discharge process is simulated and the mass flow rate, pressure and temperature during discharge are obtained. Through comparing the results of numerical simulation and experiment for pressure and temperature curves, it can be found they are approximate, which shows that...
Gravimetric hot bending is the main method of automobile glass forming nowadays. In the bending oven which often equipped with electric radiative resistances, heat transfer is complex and convection, thermal conduction and radiation should be take into account accurately. The thermal field of glass bending oven, especially the temperature distribution of glass, impose key influence on the glass forming...
With the growing power dissipation of information and telecommunication equipments, more concerns should be put on the cooling issues due to the reliability and OPEX requirements. This paper describes a fast optimizing cooling solution for the existing CO/ DC. As an important analysis approach, CFD simulation aims to improve the heat dissipation condition and the energy saving. With the application...
Using the characteristic of nonlinear function approach of CMAC neural network in cluster node, a novel model of comprehensive calibration, which aiming to improve the static state output characteristic of sensor nodes, was presented. Correction model of sensor nodes and comprehensive calibration model of cluster node were set up. The arithmetic is demonstrated, according to the simulation results,...
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