第三章 微气候环境(国外英文资料).docVIP

第三章 微气候环境 The third chapter Describe the elements of microclimate and their relationship. Answer: the micro climate refers to the field in the process of production and life of the local climate conditions in the environment, including the following four of the most important parameters: air temperature, air humidity, air velocity, thermal radiation conditions (wind speed). Some references also add a parameter: surface temperature. Micro climate relationship between each factor: in the human work or daily life environment, temperature, humidity, thermal radiation and air velocity influence on the human body can be substituted. The effect of a certain parameter on the human body can be compensated for by another parameter. We put the micro climate parameters as well as to the micro climate parameters of hot and cold feeling have a significant impact on the various combinations of comprehensive index, called the micro climate index, one of the important composition are: air temperature and surface temperature around; Air temperature, ambient surface temperature and air velocity; Air temperature, ambient surface temperature, airflow velocity and relative humidity; Air temperature, air velocity and relative humidity; Air temperature and relative humidity. The basic heat balance equation of the body. Answer: human body per unit time to send out quantity of heat, the surface depends on the human body with the surrounding environment of four kinds of heat exchange mode, namely the radiation heat transfer, convection heat exchange and evaporation heat transfer and conduction heat transfer. The bodys thermal equation is: Qs = qm-w + + + + + In the formula, Qs - the thermal savings of the human body or the rate of heat conversion (J/m2? H); W - the work done by the body to maintain physical activity and muscle activity (J/m2? H); Qm - the bodys metabolic rate (J/m2? H); Qc - the convection heat transfer rate (J/m2? H) of the external surface and surrounding environment. Qr -