in the heat of
121Heat recovery ventilation — (also known as a heat exchanger, air exchanger or air to air exchanger) is a ventilation system that employs a counter flow heat exchanger between the inbound and outbound air flow. HRV provide fresh air and improved climate control, while also… …
122Heat of combustion — The heat of combustion (ΔHc0) is the energy released as heat when a compound undergoes complete combustion with oxygen under standard conditions. The chemical reaction is typically a hydrocarbon reacting with oxygen to form carbon dioxide, water… …
123Heat-Ray — The Heat Ray is the primary offensive weapon used by the Martians in the H. G. Wells s classic science fiction novel The War of the Worlds and its offshoots. In the novel Within the context of the novel, the term Heat Ray is more commonly applied …
124The Law of Conservation of Energy — The Law of Conservation of Energy † Catholic Encyclopedia ► The Law of Conservation of Energy Amongst the gravest objections raised by the progress of modern science against Theism, the possibility of Miracles, free will, the… …
125Heat index — The heat index (HI) is an index that combines air temperature and relative humidity in an attempt to determine the human perceived equivalent temperature how hot it feels, termed the felt air temperature. The human body normally cools itself by… …
126Heat conduction — or thermal conduction is the spontaneous transfer of thermal energy through matter, from a region of higher temperature to a region of lower temperature, and acts to equalize temperature differences. It is also described as heat energy… …
127Heat capacity ratio — The heat capacity ratio or adiabatic index or ratio of specific heats, is the ratio of the heat capacity at constant pressure (C P) to heat capacity at constant volume (C V). It is sometimes also known as the isentropic expansion factor and is… …
128Heat capacity rate — The heat capacity rate is heat transfer terminology used in thermodynamics and different forms of engineering denoting the ability of a fluid to resist change in temperature as heat transfer occurs. It is typically denoted as C, listed from… …
