Refrigeration and air conditioning free online course video tutorial by iit kharagpur. A harmonic analysis with phasors is described which gives reasonable results for the refrigeration power yet is simple enough to make clear the processes which give rise to the refrigeration. Nptel, online courses and certification, learn for free. The danfoss ak2sc255 communicates with the existing eci io via the upgrade kit. Autoplay when autoplay is enabled, a suggested video will automatically play next. Apr 27, 2016 carnot refrigeration system with dry compression it can be seen from the above expression that the cop of a carnot refrigeration system increases as the evaporator temperature increases and condenser temperature decreases. However, our real strength has for years been with hvacr technicians. Heat transfer nptel online videos, courses iit video. A model of an airconditioning condenser and evaporator with. Download free sample and get upto 48% off on mrprental. In recent years, there has been a rapid development in these cryocoolers, especially in the field of pulse tube cooling. A publication of the lubrication engineers technical department leaders in lubricants number 48 refrigeration systems cold is a relative term which specifically refers to a reduced temperature condition within a confined space.
Lecture 17 vapour absorption refrigeration systems contd. Comfort conditions and air conditioning factors which affect it. Up next mod01 lec27 cryocoolers ideal stirling cycle duration. A model of an airconditioning condenser and evaporator with emphasis on in tube enhanceinenl k. Nptel courses from iit kharagpur view engineering video lectures, course materials by top faculty from iit kharagpur. Average refrigeration cost is 49% of chain average. Nptel online videos, courses iit video lectures well organized.
Similarly, during pressurisation elements of gas entering the tube via the regenerator i. Download refrigeration and air conditioning by arora, ramesh. Mar 06, 2015 pinnacle career institute online hvac training refrigeration systems the four major components. Click on any video lecture link to view and download that video. Both power generation and refrigeration are usually accomplished by a system that. Oil analysis as a diagnostic tool for industrial refrigeration syste picture 1. Fundamentals of mechanical refrigeration systems course content introduction mechanical refrigeration is a thermodynamic process of removing heat from a lower temperature heat source or substance and transferring it to a higher temperature heat sink. Refrigeration cpsw calculation metric low leak rates and low refrigerant use refrigeration costs include cpsw. A mechanical refrigeration system produces this condition by piping a volatile. Unit 3 refrigeration equipment refrigeration equipment.
The pulse tube refrigerator ptr or pulse tube cryocooler is a developing technology that emerged largely in the early 1980s with a series of other innovations in the broader field of thermoacoustics. Learn for free, pay a small fee for exam and get a certificate. The recent developments in this field will be described. Slide bearing seizure on screw compressor due to lack of oil viscosity. An exotic metal alloy may be the key to a new quieter, more economical class of home and commercial refrigeration systems based on magnetics rather than conventional gas compression and expansion. Nptel provides elearning through online web and video courses various streams. Electrical pulse width modulation for power electronic converters playlist. Pal mechanical engineering department iowa state university ames, iowa 1.
Describe various air cycle refrigeration systems section 9. Purpose of air conditioning and definition of terms. Refrigeration engineering lecture notes slideshare. The advent of digital technology means huge quality improvements when it comes to the adjustment of refrigeration systems or heat pumps. Introduction a computational model was developed for airconditioning condensers and eva porn tur with either inlube enhancement or installed smooth tube. Mechanical refrigeration and airconditioning youtube. The refrigeration or air conditioning system r transfers heat from a cooler.
Nimai mukhopadhyay and someshwar chowdhury 9 studied theoretical modeling of solarassisted cascade refrigeration low cost solar cooling system. Heat transfer nptel online videos, courses iit video lectures. Refrigeration and airconditioning nptel online videos. Electrical engineering pulse width modulation for power electronic converters. A schematic of a typical basic refrigeration system is shown below. Which is basically a large heat exchanger, by rejecting heat to a cooling. Refrigeration costs advanced refrigeration systems. The efficiency and refrigeration power are compared with those of other refrigeration cycles. Technical assessment of refrigeration technologies the assessment of refrigeration tech nologies involved the evaluation of two fundamental criteria common to all refrig eration and airconditioning applications. Thermometers are used to calibrate the controls of refrigeration. The two most common thermometer scales are the fahrenheit and the celsius.
Energyplus can model refrigerated case equipment consisting of a compressor rack, multiple refrigerated cases and walkin coolers, secondary loop equipment, and optional heat reclaim air and water heating coils. Knowing the temperature difference across the coils, the amperage, and the airflow all give the technician vital information. Cylinder and piston mechanism and pv diagram of a reciprocating compressor where d is the bore or diameter and l is the stroke, i. Pdf vortex tube is the device that separates pressurized fluid into hot and cold fluid streams simultaneously. Buy refrigeration and air conditioning by arora, ramesh chandra pdf online. Smart material, adaptive structures and intelligent mechanical systems iitk. The nature of these liquids causes them to rise or fall uniformly in the hollow tube with each degree in temperature change. Iit kharagpur nptel courses video courses and lectures by. This paper explores industrial refrigeration system optimization and control, including how to maximize the overall efficiency of a refrigeration systems operation with a focus on the key components including the evaporator, compressor, condenser, and control device.
If playback doesnt begin shortly, try restarting your device. Nptel video lectures, iit video lectures online, nptel youtube lectures, free video lectures, nptel online courses, youtube iit videos nptel courses. The partial vacuum in the vessel causes some of the. New refrigeration system based on magnetics more economical.
Stirling cryocooler and gmrefrigerators, this cryocooler can be made without moving parts in the low. Refrigeration is the process of removing heat from an area or a substance and is usually done by an artificial means of lowering the temperature, such as the use of ice or mechanical refrigeration. Todays modern pulse tube coolers incorporate these improvements. Ieicos computerized refrigeration cycle test rig is. Mechanical refrigeration is defined as a mechanical system or apparatus so designed and. The series pulse tube configuration described earlier in this paper was the first multistage assembly built to improve the base temperature of the pulse tube refrigerator. In this contribution the thermodynamics and hydrodynamics of pulse tube refrigeration will be explained. Alternative technologies for refrigeration and air. On this channel you can get education and knowledge for general issues and topics. Steam is passed through a vacuum ejector of high efficiency to exhaust a separate, closed vessel which forms part of a cooling water circuit. This can be explained very easily with the help of the ts diagram fig. Heating, ventilation, aircondition, refrigeration measuring instruments from testo are used by customers all over the world for widely differing applications.
Refrigeration and air conditioning is used to cool products or a building environment. Refrigeration and air conditioning online course video. It is important to attach and remove a gauge manifold. Digital manifolds provide highprecision temperature and pressure measurements, determine subcooling and superheating, but also enable reliable evacuation of the system through accurate vacuum measurement. Arora from iit kharagpur made available by nptel elearning initiative. Refrigerant includes co 2 refrigeration parts refrigeration labor year to date 2010. Heating, ventilation, aircondition, refrigeration testo. A publication of the lubrication engineers technical department.
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