Your roadmap · आपका रोडमैप
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Admission & first meetingप्रवेश और पहली मुलाकातEnquire at your nearest NDSS centre, meet the teacher, fix the batch time and get your study material.
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Part 1 of the syllabusपाठ्यक्रम भाग 1Unit-wise coaching with notes and doubt classes.
Fundamentals of RefrigerationVapour Compression RefrigerationVapour Absorption and Other Systems
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Part 2 of the syllabusपाठ्यक्रम भाग 2Unit-wise coaching with notes and doubt classes.
Refrigerants and ComponentsPsychrometryAir Conditioning Systems
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Unit tests & assignmentsयूनिट टेस्टRegular tests in the university / board pattern.
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Semester 5 exam (university / board)विश्वविद्यालय / बोर्ड परीक्षाPrevious papers and full revision before the exam.
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Online tests & resultऑनलाइन टेस्ट और रिज़ल्टTake the tests online; your marks and result show in your student login and at the centre.
Syllabus · पाठ्यक्रम
1 subject · 6 chapters · 29 topics
01Fundamentals of Refrigeration
5 topics+
- Refrigeration and its applications
- Unit of refrigeration (TR)
- COP of refrigerator and heat pump
- Reversed Carnot cycle
- Air refrigeration (Bell-Coleman) cycle
02Vapour Compression Refrigeration
5 topics+
- Simple VCR cycle components
- Cycle on T-s and p-h charts
- Refrigerating effect, work and COP
- Effect of sub-cooling and superheating
- Actual vs theoretical cycle
03Vapour Absorption and Other Systems
4 topics+
- Simple ammonia-water absorption system
- Lithium bromide-water system
- Electrolux refrigerator
- Comparison of VCR and VAR
04Refrigerants and Components
5 topics+
- Classification and properties of refrigerants
- Eco-friendly refrigerants, ODP and GWP
- Compressors, condensers and evaporators
- Expansion devices: capillary tube, TXV
- Domestic refrigerator and water cooler
05Psychrometry
5 topics+
- Psychrometric terms: DBT, WBT, DPT, RH, specific humidity
- Psychrometric chart
- Sensible heating and cooling
- Cooling with dehumidification, heating with humidification
- Adiabatic mixing
06Air Conditioning Systems
5 topics+
- Human comfort conditions
- Summer, winter and year-round air conditioning
- Window, split and package units
- Central air conditioning, ducts and AHU
- Cooling load estimation (introduction)
About this course
You will be able to
- Explain the unit of refrigeration, COP and the reversed Carnot and air refrigeration cycles
- Analyse the vapour compression cycle on p-h and T-s charts and calculate COP and power
- Explain the vapour absorption system and compare it with vapour compression
- Select refrigerants and explain compressors, condensers, expansion devices and evaporators
- Use the psychrometric chart for common air conditioning processes
- Explain window, split, package and central air conditioning systems and basic cooling load
Who it is for
- Diploma Mechanical Engineering students of Semester 5 (BTEUP)
- Students aiming for jobs in HVAC and refrigeration servicing
- Students preparing for JE-level technical exams
What you need
- Thermal Engineering and basic thermodynamics of earlier semesters
Online tests & result
Practice and unit tests online; marks and result show in your student login and at the centre.
Student login →
Questions
Will I learn to use the p-h and psychrometric charts?
Yes. Both charts are used in class to solve cycle and air conditioning problems.
Is this useful for AC servicing jobs?
Yes. Components, refrigerants and AC systems are explained with practical examples.
Is this course based on the BTEUP syllabus?
Yes. The units follow the BTEUP (Board of Technical Education, Uttar Pradesh) diploma syllabus. If your polytechnic follows a different board or a revised scheme, the centre teaches your own syllabus.
