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  2. Direct digital control - Wikipedia

    en.wikipedia.org/wiki/Direct_digital_control

    Direct digital control is often used to control heating, ventilating, and air conditioning devices such as valves via microprocessors using software to perform the control logic. Such systems receive analog and digital inputs from the sensors and devices and, according to the control logic, provide analog or digital outputs.

  3. HVAC control system - Wikipedia

    en.wikipedia.org/wiki/HVAC_control_system

    However, when designing HVAC systems, many engineers design it for a specific setting and/or purpose. When engineers are designing an HVAC system, they try their best to make it compact while still being able to perform at the highest level and experiment with different ways to make HVAC systems as efficient as possible.

  4. Date-time group - Wikipedia

    en.wikipedia.org/wiki/Date-time_group

    The DTG is usually placed in the header of the message. One example is "21:19 Mar 05, 2025 (UTC)"; while another example is "21:19 05 Mar 2025". The DTG may indicate either the date and time a message was dispatched by a transmitting station or the date and time it was handed into a transmission facility by a user or originator for dispatch.

  5. Glossary of HVAC terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_HVAC_terms

    HVAC (heating, ventilation, and air conditioning) is a major sub discipline of mechanical engineering. The goal of HVAC design is to balance indoor environmental comfort with other factors such as installation cost, ease of maintenance, and energy efficiency. The discipline of HVAC includes a large number of specialized terms and acronyms, many ...

  6. Siemens NX - Wikipedia

    en.wikipedia.org/wiki/Siemens_NX

    NX, formerly known as "Unigraphics", is an advanced high-end CAD/CAM/CAE, which has been owned since 2007 by Siemens Digital Industries Software. [1] [2] In 2000, Unigraphics purchased SDRC I-DEAS and began an effort to integrate aspects of both software packages into a single product which became Unigraphics NX or NX.

  7. Heating, ventilation, and air conditioning - Wikipedia

    en.wikipedia.org/wiki/Heating,_ventilation,_and...

    HVAC system design is a subdiscipline of mechanical engineering, based on the principles of thermodynamics, fluid mechanics, and heat transfer. "Refrigeration" is sometimes added to the field's abbreviation as HVAC&R or HVACR, or "ventilation" is dropped, as in HACR (as in the designation of HACR-rated circuit breakers).

  8. MPDS4 - Wikipedia

    en.wikipedia.org/wiki/MPDS4

    DUCTING DESIGN MPDS4 DUCTING DESIGN is a software module for routing HVAC, of differing sections, into a plant or factory. MPDS4 DUCTING DESIGN includes catalogs with different types of ducts, valves, fans and other supporting components. MPDS4 Engineering Review virtual walk-through of an airport ELECTRICAL DESIGN

  9. CATIA - Wikipedia

    en.wikipedia.org/wiki/CATIA

    CATIA (/ k ə ˈ t iː ə /, an acronym of computer-aided three-dimensional interactive application) is a multi-platform software suite for computer-aided design (CAD), computer-aided manufacturing (CAM), computer-aided engineering (CAE), 3D modeling and product lifecycle management (PLM), developed by the French company Dassault Systèmes.

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