It can be derived that the molar specific heat at constant pressure is:.

The purpose of a heat pump is to supply a heat to a region by taking heat from a lower temperature region. Lesson D - Reversible and Irreversible Processes. for a heat engine used as either an air conditioner or a heat pump operating between the same two temperatures. Figure 15.29 A simple heat pump has four basic components: (1) condenser, (2) expansion valve, (3) evaporator, and (4) compressor. 6C-2 - Is This a Perpetual Motion Machine ?



2. 6B-1 - Home Heat Pump COP; 6B-2 - Coefficient of Performance of a Heat Pump and a Refrigerator; Lesson C - The 2nd Law of Thermodynamics.

U = 3/2nRT.

Heat pump: Otto cycle: Rectangle on PV diagram: Diesel engine: Index Heat engine concepts .

C v = 3/2R = 12.5 J/mol K. because. An artifact of the second law of thermodynamics is the ability to heat an interior space using a heat pump. Heat Pump - A heat pump is a type of heat engine, similar to a refrigerator, which is used to heat buildings by cooling the outside air. Heat pumps compress cold ambient air and, in so doing, heat it to room temperature without violation of conservation principles. According to the first law of thermodynamics, for constant volume process with a monatomic ideal gas the molar specific heat will be:. In this heat pump energy flow diagram: Q c represents the thermal energy taken from the outside air; Q h represents the thermal energy transferred to the inside of the house; W represents the work needed to achieve this; T c is the temperature of the heat pump’s working fluid (liquid); T h is the temperature of the heat pump’s working fluid (vapour). Real air conditioners and refrigerators typically do remarkably wel 6C-1 - Is This a Perpetual Motion Machine ?

Optimum performance is achieved as the amount of work required for a specified amount of heat delivered to the higher temperature region is minimised. 6D-1 - Determine Whether Water Condensing is a Reversible Process In the heating mode, heat transfer Q c Q c size 12{Q rSub { size 8{c} } } {} occurs to the working fluid in the evaporator (3) from the colder outdoor air, turning it into a gas. This requires energy input, usually in the form of work as indicated in Fig. The Carnot Cycle In 1924, French engineer Sadi Carnot created an idealized, hypothetical engine which had the maximum possible efficiency consistent with the second law of thermodynamics.


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