Points out the error in the article Discussion on development of heat pump definition and improvement of an exergy efficiency formula published in Heating Ventilating and Air Conditioning February 2002, through citing some references substantiates that the concept of heat pump in thermodynamics is identi...
In thermodynamics, the coefficient of performance defines the ratio of the amount of supplied or removed heat by a thermodynamic system, and the amount of work done needed. It is a unitless quantity. Usually, it is used to obtain the efficiency of a thermodynamic system. ...
Multi Stage Air Compressor Multi Stage Air Compressors the efficiency is increased by using more than one stage if intercooling Pelton Impulse Water Turbine Design Formulas This is a water turbine in which the pressure energy of the water is converted wholly to kinetic energy in one or more ...
Forum:Thermodynamics Heat Pump Real-World Performance For those who don't know, I'm an HVAC engineer. From time to time, the issue of heat pump efficiency comes up. When picking a system, obviously efficiency (cost) is important, so we need to decide between, usually, heat pumps (air ...
The design head of the axial flow pump station model is 203 l/s; the design head is 2.01 m, and the efficiency of the design operating point is 68.39%. Table 1 shows the main geometric parameters of the axial flow pump hydraulic model equipped in the pump station system. Three-...
Pump internal volumetric flow leakage and volumetric efficiency are related to pump geometry and flow properties. The procedure adopted in this paper is capable of obtaining performance characteristic curves of centrifugal pump in a dimensionless form. Pump head coefficient, manometric efficiency, power ...
DP gear pump volume efficiency curvemodel codeDPR 0.2cc precision grade gear metering pump dimension diagramDPR 0.6-3.6 cc precision grade gear metering pump dimension diagramDPR 5-40 cc precision grade gear metering pump dimension diagramDP series precision grade gear metering pumpDP 0.2-3.6 cc +...
The CHPS improves the overall efficiency of a CHP system with respect to conversion of fuel energy to usable heat ... SM Kelly,MT Faville - US 被引量: 162发表: 2008年 The quantum heat engine and heat pump: An irreversible thermodynamic analysis of the three-level amplifier The ...
A comparison of the experimental and exergy analysis results shows that the energy efficiency of the designed system is close to that of the MVR system in the literature, and the designed system has advantages in both compressor selection and system operation. Keywords: Distillation system; Heat ...
the work required by the compressor has to equal to work output of the turbine and may be expressed as ##EQU1## where mcis mass flow through the compressor and mjequals the mass flow through the ejector. From this relationship for any turbine and compressor efficiency, the required mass flo...