- 行业: Government
- Number of terms: 22108
- Number of blossaries: 0
- Company Profile:
Two metals of different coefficients of expansion welded together so that the piece will bend in one direction when heated, and in the other when cooled, and can be used to open or close electrical circuits, as in thermostats.
Industry:Energy
Under the First Law of Thermodynamics, efficiency is the ratio of work or energy output to work or energy input, and cannot exceed 100 percent. Efficiency under the Second Law of Thermodynamics is determined by the ratio of the theoretical minimum energy that is required to accomplish a task relative to the energy actually consumed to accomplish the task. Generally, the measured efficiency of a device, as defined by the First Law, will be higher than that defined by the Second Law.
Industry:Energy
Ventilation that is created by the differences in the distribution of air pressures around a building. Air moves from areas of high pressure to areas of low pressure with gravity and wind pressure affecting the airflow. The placement and control of doors and windows alters natural ventilation patterns.
Industry:Energy
Waste material from households and businesses in a community that is not regulated as hazardous.
Industry:Energy
Waste water from a household source other than a toilet. This water can be used for landscape irrigation depending upon the source of the greywater.
Industry:Energy
Water in vapor form; used as the working fluid in steam turbines and heating systems.
Industry:Energy
