建筑环境-能源应用工程专业英语10.ppt

;;Cast-iron Radiator;In the direct-return system, the length of supply and return piping through the subcircuits is unequal, which may cause unbalanced flow rates and require careful balancing to provide each subcircuit with design flow. Ideally, the reverse-return system provides nearly equal total lengths for all terminal circuits.;Solar Altitude and Solar Azimuth;The current value of the solar constant (which is defined as the intensity of solar radiation on a surface normal to the sun’s rays, just beyond the earth’s atmosphere at the average earth-sun distance) is 1367 W/m2.;Spectral Solar Irradiation;;;Five Elements of Passive Solar Home Design Aperture (Collector) The large glass (window) area through which sunlight enters the building. Absorber The hard, darkened surface of the storage element. Thermal mass The materials that retain or store the heat produced by sunlight. Distribution The method by which solar heat circulates from the collection and storage points to different areas of the house. Control Roof overhangs can be used to shade the aperture area during summer months.;Active solar heating system;1: Sensor 传感器 2: Air Vent 排气口 3: Sensor wire 传感器线 4: Pump or circulator 循环泵 5: Pressure Relief Valve 减压阀 6: Sensor 传感器 7: Pressure Relief Valve 减压阀 8: Thermometer 温度计 9: Tempering Valve 混水阀 调温阀 10: Hot water output 热水输出 11: Cold water feed line 补水管 12: Knob adjusts water temperature output 13: Bypass “H” valve 旁通阀 14: Check Valve 逆止阀 15: Solar col