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  • ENVC 2311: Refrigeration Laboratory I

    1.00 Credits
    CUNY New York City College of Technology

    3 lab hrs, 1 cr A laboratory course in which students receive experience in installing, operating and maintaining refrigeration equipment. They learn methods of joining piping and tubing; compressor assembly and disassembly; use of analog and digital temperature and pressure instrumentation; and procedures for recovery, evacuation and charging of refrigeration systems under EPA guidelines. The final project requires students to work as team members to assemble, wire and install a complete refrigeration system. Individual reports are required for each laboratory exercise. Pre- or corequisite: ENVC 2312/ EC 312
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  • ENVC 2312: Principles of Refrigeration

    3.00 Credits
    CUNY New York City College of Technology

    3 cl hrs, 3 cr A lecture course that covers refrigeration theory, applications, equipment and systems. Students learn the properties of various refrigerants, temperature-pressure relationships of saturated vapors, compression refrigeration and heat pump cycles, operating principles of compressors, characteristics of evaporators and condensers, refrigerant flow control devices, applications of pressure-enthalpy diagrams of refrigerants, cooling tower theory and operation, selection and matching of refrigeration system components, and the operation and uses of absorption refrigeration systems. Prerequisite: ENVC 1110/EC 110
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  • ENVC 2321: Air Conditioning Systems Laboratory II

    1.00 Credits
    CUNY New York City College of Technology

    3 lab hrs, 1 cr A laboratory course that teaches methods to evaluate the performance of air handling and air conditioning systems. Students learn how to use a sling psychrometer, balometer, pitot tube and draft gauge, Alnor Velometer, anemometers, computer data loggers and sound level meters. They are introduced to operating, testing and calibrating procedures for HVAC system pneumatic controls. Students will work with different types of air conditioning equipment, from residential and small commercial split and packaged air conditioning and heat pump systems, to a larger chilled water system, which uses a cooling tower and chilled water distribution to separate air handlers. Students write individual laboratory reports on the performance testing of ducts, diffusers, controls and air conditioning systems. Prerequisites: ENVC 1110/EC 110, ENVC 1111/EC 111; pre- or corequisite: ENVC 2322/EC 322
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  • ENVC 2322: Principles of Air Conditioning II

    3.00 Credits
    CUNY New York City College of Technology

    3 cl hrs, 3 cr A lecture course that teaches psychrometrics and cooling load calculation methodologies. Students learn to use psychrometric charts to determine the properties of air at various conditions, and the sensible and latent energy changes required to maintain specified comfort levels in occupied spaces. They also learn to calculate cooling loads, using both computerized modeling software and manual methods in accordance with accepted industry practices. Prerequisite: ENVC 1110/EC 110
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  • ENVC 2340: Air Conditioning Systems Design

    3.00 Credits
    CUNY New York City College of Technology

    2 cl hrs, 2 lab hrs, 3 cr A computerized drafting and design course that teaches the procedures used in designing, analyzing and laying out air handling systems. Students learn to perform the calculations and analyses necessary to size ducts and accessories, determine pressure drops, lay out mechanical equipment rooms, specify fans and select diffusers and registers. They utilize AutoCad Computer-Aided Design and Drafting software to complete their drawing and design projects. Prerequisites: ENVC 1110/EC 110, ENVC 1120/EC 120; pre- or corequisite: ENVC 2322/EC 322
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  • ENVC 2411: Refrigeration Laboratory II

    1.00 Credits
    CUNY New York City College of Technology

    3 lab hrs, 1 cr A laboratory course in which students continue their experience in installing, operating and maintaining refrigeration equipment. They learn how to install refrigeration electrical controls and motors, procedures for testing and troubleshooting electrical systems, and how to operate chilled water systems. Individual reports are required for each laboratory exercise. Prerequisites: ENVC 2311/EC 311, ENVC 2312/EC 312
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  • ENVC 2420: Principles of HVAC Systems Controls

    3.00 Credits
    CUNY New York City College of Technology

    3 cl hrs, 3 cr A lecture course that introduces the principles of HVAC control systems design. Students are introduced to the theory of control and learn the methods of control of air conditioning, heating and refrigeration systems. They study HVAC control instrumentation, control devices, pneumatic control systems and electric and electronic control systems. Prerequisite: ENVC 2322/EC 322
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  • ENVC 2421: Air Conditioning Systems Laboratory III

    3.00 Credits
    CUNY New York City College of Technology

    2 cl hrs, 2 lab hrs, 3 cr A laboratory course in which students perform evaluations of chilled water air conditioning systems, cooling tower water treatments and indoor air quality. They learn the operation of boilers with dual fuel burners, and hydronic heating systems. Also included are computerized HVAC Direct Digital Control systems, and acoustic and vibration analysis of mechanical equipment. Individual laboratory reports are required. Prerequisites: ENVC 2321/EC 321, ENVC 2322/EC 322
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  • ENVC 2432: Advanced Air Conditioning Systems Design

    3.00 Credits
    CUNY New York City College of Technology

    2 cl hrs, 2 lab hrs, 3 cr An advanced theory and design course in which students specify and design a complete heating, air conditioning and ventilation system. Students calculate heating and cooling loads, write specifications, utilize building and energy codes, determine ventilation requirements, and specify mechanical systems and integrate them with the building construction. AutoCad and computerized load calculation software are utilized. Prerequisites: ENVC 1220/EC 220, ENVC 2322/EC 322, ENVC 2340/EC 340, MAT 1275/MA 275
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  • ENVC 2436: HVAC Systems Cost Estimating

    3.00 Credits
    CUNY New York City College of Technology

    3 cl hrs, 3 cr A lecture course that teaches how to estimate the costs of HVAC systems. Students learn the different types of estimates, estimating forms and methods, and company overhead, mark-up, and budget prices. They also learn to estimate the costs of mechanical heating and cooling equipment, fans and blowers, cooling towers, pumps, tanks, piping, ductwork, air distribution devices, insulation, HVAC system controls and electrical power wiring. Students will be required to complete a cost estimate for an entire air conditioning system project. Prerequisites: ENVC 1210/EC 210, ENVC 1220/EC 220, ENVC 2340/EC 340, MAT 1275/MA 275; corequisites: ENVC 2420/EC 420, ENVC 2432/ EC 432
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