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Test Code : HP0-M49
Test Name : HP Virtual User Generator 11.x. Software
Vendor Name : HP
: 70 Real Questions

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enhancing integration of electric powered and HVAC design | HP0-M49 Real Questions and VCE Practice Test

be aware of the factors to trust when working to maximise integration of electrical and HVAC system design to obtain financial and operational merits.

through John McGonegle, PE, LEED AP; IMEG Corp., Rock Island, sick. July 31, 2018

researching pursuits

  • bear in mind the benefits of integrating electrical and HVAC design.
  • develop into standard with the codes and standards that affect electrical and HVAC integration.
  • find out about a few applied sciences and tools that may maximize electrical and HVAC design integration.
  • the integration of electrical design with HVAC systems continues to gain significance and expertise as constructing programs develop into increasingly advanced—and more able to sharing counsel.

    building programs’ starting to be complexity, performance, and suppleness—and their ability to combine at higher stages—is being unexpectedly pushed by way of functions made feasible by the web of issues (IoT), which makes it possible for operational techniques and subsystems to "speak" to every other and bring more accurate and beneficial advice to the operations body of workers (and enhance the occupant event). This more advantageous communication and integration outcomes in smarter buildings and allows operators to make the finest-informed decisions in working and conserving their constructions in a secure, comfy, and energy-effective manner.

    Figure 1: This shows an example of a room data sheet, which may be used to communicate the project requirements in the design-development phase and construction specifications. Courtesy: IMEG Corp.The electrical and HVAC designers deserve to work together from the schematic design stage ahead to coordinate and optimize their design integration. Taking expertise of the alternatives to maximize integration starts off with a dedication to communication and a mutual knowing of every self-discipline’s terminology and methods. They also deserve to examine apples to apples—if one is asserting "horsepower" and one is saying "kilowatts," there is an expanded opportunity for miscommunication and error.

    The designers additionally deserve to with ease communicate with the constructing proprietor/clients-a important action for understanding the anticipated results of the challenge’s normal integrated automation (IA) gadget and to specify the proper input points, sequences, methods, and analytical experiences. An air handler, as an example, may have dissimilar sensors with analog inputs, analog outputs, digital inputs, and digital outputs that should be coordinated.

    The designers should still be knowledgeable concerning the benefits and liabilities of all systems being considered, deliver a lifecycle can charge-improvement evaluation for all alternatives, and then guide the proprietor/consumer in selections. The proprietor’s desired outcomes should be included within the proprietor’s assignment necessities (OPR) to be used right through the design section and commissioning. A multidiscipline, coordinated room facts sheet or matrix of input points and constructing programs may well be used to communicate the requirements within the design-development part and building standards (see figure 1).

    proper integration of electrical and HVAC methods also includes the rightsizing of the systems and gadget. outsized chillers, mills, boilers, and transformers aren't working at their maximum effectivity, which adds working costs, additional area necessities, and additional put in cost.

    Small steps towards integration

    Who remembers pneumatic controls? historically, electrical designers special device and controls in building standards Institute (CSI) Division sixteen or 26, and mechanical designers targeted gadget and controls in CSI Division 15 or 23. Integration was finished chiefly on a tough-wired contact stage between the electrical and mechanical methods.

    The fire alarm equipment duct detector may be wired to shut down the air handling unit’s starter, nonetheless it would take an further two wires to the temperature controls to sign that the fan had been shut down and the dampers should shut. This made it difficult to integrate controls.

    In response, ASHRAE developed a data-verbal exchange protocol for building automation and manage networks (BACnet) to enable constructing programs from different producers to interoperate. The version BACnet/IP makes it possible for for IP subnetworks and internetworks of assorted BACnet networks. consequently, the hearth alarm’s BACnet interface could have bidirectional supervisory communications with the constructing’s temperature controls over a LAN (local area community) pair of wires.

    Figure 2: Integrated automation breaks down the silos of all systems. Courtesy: IMEG Corp.As building technology advances, having separate control networks for every equipment turns into more high priced and sophisticated. homeowners are requesting more aspects and integration to cut back working charges and simplify operations. we've come a protracted approach from pneumatic controls, and the tempo of change is accelerating. The next step is to knock down the silos of disciplines that nonetheless are doing their own aspect, and in its place birth pondering holistically (see determine 2).

    requirements for integration

    Electrical and HVAC design integration is guided by means of requisites similar to those developed by means of building standards Institute (CSI), the electronic accessories business affiliation (ECIA), and the purchaser Electronics affiliation (CEA).

    CSI Division 25, integrated Automation, covers systems together with building automation, energy-management optimization, lights, room scheduling, fire detection and suppression, safety, guidance know-how (IT)/telecommunications, elevators, audio/video programs, and others. in accordance with CSI, IA systems should still be capable of include renewable energy monitoring and manage and be designed for single or diverse buildings.

    CSI Division 25 additionally specifies that a constructing’s IA system combine the subsystems represented by the CSI grasp layout amenities Subgroup, which contains:

  • Division eleven—machine.
  • Division 14—Conveying methods.
  • Division 21—fireplace Suppression.
  • Division 22—Plumbing.
  • Division 23—HVAC.
  • Division 26—Electrical.
  • Division 27—Communications.
  • Division 28—electronic security & protection.
  • The CSI Division 25 specification includes common work for operation and protection, cabling, commissioning, community contraptions, instrumentation and terminal instruments, manage of equipment, and manage sequences. field contraptions, comparable to sensors, transmitters, and control valves, are usually related to their respective local manage panels, which communicate with the monitoring and manage hardware.

    sooner or later, an IoT equipment may additionally connect to the backbone and talk with the built-in constructing systems. There are wireless remote sensors and switches that make it easy to retrofit current constructions or add a handle aspect. The IA servers and switches could be co-discovered with the IT servers. An operator laptop that might video display all the integrated programs would keep space and time spent practising operators on assorted methods.

    For building controls integration, the ECIA and CEA have collectively adopted EIA/CEA 709.1-B-2002: handle community Protocol Specification as an open-structure building controls commonplace. This ordinary is authorised by using ANSI and turned into at first developed by means of Echelon Corp. (Echelon’s LonTalk, the communications protocol that makes it possible for LonWorks-suitable manage devices to communicate with one another, is according to this standard.)

    Open-architecture handle programs have hardware and software specifications that are public guidance, and accessible to third parties to enhance gadget and application for the open gadget. different conversation standards are Modbus, BACnet, and proprietary specifications. The norm is proprietary building automation, hearth alarm, protection, and other techniques, which restricts the volume of useful integration. regardless of the constructing controls ordinary used, cybersecurity have to be addressed within the IA system design, requisites, and operations.

    The electrical, HVAC, communication, and security designers should still talk about the IA and community requisites with each different and building owners-and agree on which ones to use on the undertaking. This makes it possible for them to choose and schedule device and in the reduction of IA communication problems and the need for network gateways. The different techniques need to be in a position to communicate to synergize the gathered advice.

    for example, a radio-frequency identification (RFID)-tagged employee badge may provoke the access-handle system to communicate with three different constructing techniques provided through distinctive contractors, sending the indicators that could activate the special lights, prompt the occupied setpoints, name the elevator to the entry degree, and log the worker number.

    The built-in automation gadget could be supplied with the aid of the constructing administration/automation device (BMS/BAS), the electrical contractor, or an unbiased integration contractor. lots of the significant electrical machine suppliers have vertically built-in BAS into the capabilities and constructed communications and metering into their gadget. here's a fashion within the world built-in automation container, with a turning out to be market.

    various stages of complexity

    Figure 3: This example shows a list of setpoints per CSI divisions 25 and 26. Courtesy: IMEG Corp.Integration of the electrical and HVAC designs can also be accomplished on initiatives of all sizes, with the level of complexity various by means of assignment type.

    facts centers, as an instance, require a high degree of integration of the electrical and HVAC designs. The redundancy of electrical services, chillers, air con devices, and standby generators adds to the complexity of the tasks.

    For this class of assignment, a possibility assessment may still be executed to assess the one point of failure of the electrical and HVAC device. A double-ended unit substation goes to require cooling to operate within its design temperature limits, however you don’t need a piping leak to spray on the electrical equipment. The HVAC controls should still have redundancy and an uninterruptable vigor give it truly is backed up with the aid of the standby vigour. Motor handle centers (MCC) with NEMA class II B or II C wiring can combine the starters, variable frequency drives (VFDs), overcurrent protecting instruments, transformer, and branch-circuit panelboard with interlock and interconnect wiring manufacturing unit-installed.

    Controls and programmable common sense controllers (PLCs) may also be blanketed in the MCC lineup. The MCC can retailer house, reduce box wiring, and simplify renovation.

    In health care, a patient room with built-in nurse name, lighting fixtures controls, window-shade controls, and far flung manage of temperature setpoints will make for a better patient experience. The temperature setpoint may well be adjusted through the tv faraway control and on-display app or through a instant controller. The electrical lighting fixtures controls, HVAC temperature controls, nurse call, and television techniques would must be integrated and capable of speak with each and every different.

    For smaller initiatives, which may additionally now not justify the cost of a full Division 25 integrated Automation device, some integration of Division 23 and Division 26 controls will also be certain. Networked lighting controls can be partly built-in with the BAS. The occupancy sensor and daytime sensor in an office could ship their output sign to a networked room controller. The room controller could dim the lights in response to daylight hours availability and turn off the lights and controller receptacles after occupants leave. The room controller might send a signal to the lights manage primary gadget when the room is unoccupied. The significant device could communicate by the use of BACnet to the BAS equipment that the space is unoccupied.

    The BAS could send a signal to a committed outdoor air equipment (DOAS) to in the reduction of the outdoor air ventilation rate, after which reset the room heating and cooling variable air quantity (VAV) box cubic feet per minute. The BAS could receive a demand-response sign from the utility wise grid to restrict the power to the air con device and transmit a BACnet message to all of the room controllers to dim the lighting fixtures. The BAS may be the grasp time clock and time table the lights in the course of the lighting fixtures valuable handle device. The extra cost to achieve this integration is a network cable between the room controllers and a cable between the lighting fixtures central handle gadget and BAS, plus the programming of the sequence of operation.

    technologies and procedures

    Electrical and HVAC designers may still agree with an built-in equipment that reduces complexity and space requirements, saves energy, improves reliability, and doubtlessly saves fees. quite a lot of applied sciences and strategies may also be used to accomplish these dreams together with:

    Electronically commutated motors—ECMs deliver variable-pace control with the rectifier/controller being part of the dc’s permanent magnet motor. the integration offers house discounts for for my part established VFDs when compared with general induction motors.

    ECMs are frequently configured in fan arrays due to their commonplace horsepower barriers. ECM efficiency tiers from 70% to 85% versus forty% to eighty% for three-section motors and 30% to 70% for single-part motors. ECMs have more suitable part-load effectivity than NEMA top rate motors of equal dimension, and the motor controller offers coverage in opposition t overload, part loss, overheating, and energy surges.

    Figure 4: Some LED lighting luminaires with light-fidelity (Li-Fi) wireless communications receive their power and communications over a single Ethernet cable and integrate occupancy sensors and temperature/humidity sensors. Courtesy: IMEG Corp.The ECM may also be tender-started to restrict the beginning inrush required when on a standby generator, and the controller can settle for a 0 to 10 Vdc, or a Modbus signal despatched from the BMS to handle the speed, typically within the range of 10% to a hundred%. a simple 0 to 10 Vdc sign will supply a linear 0% to 100% velocity control. Modbus communications are bidirectional, so the motor rotations per minute and temperature can give remarks to supply superior and more accurate handle sequences.

    at the moment accessible ECMs are constrained in kilowatt capacity to eleven kW (15 hp). Fan arrays of dissimilar modular ECMs may also be designed to match the capacity required. The fan array gives redundancy in motors and controllers, so if one motor fails the others can continue to be functional. To gain redundancy for a VAV air handler with VFD would require as a minimum two enthusiasts and two VFDs. The VFDs may also be unique with conversation cards and digital energy meters to combine with the IA device.

    The modular fan assembly simplifies substitute in tight areas. The HVAC gadget specification can include an integrated common fan-array disconnect, ECMs, and Modbus controls compatible with the BMS. The built-in gadget eliminates the electrical starter/VFD and motor wiring, which saves house and complexity.

    Integration of the VAV air handling system controls with the BMS, vigor monitoring, and fireplace alarm techniques—The control sequence could be specified in CSI Division 25 for setpoints, occupancy time table, prealarms, alarms, preventive-maintenance notifications, and power usage. The energy metering can also be used as an enter to a demand-response manage sequence that may dim the lighting fixtures, reset the temperature setpoint, limit the chiller-enter energy, and cut back the air managing cubic toes per minute to restrict the electrical top demand. The IA system can centrally video display and monitor the methods in a typical structure to in the reduction of the practicing time of operators (see determine three).

    the usage of the same backbone for numerous applications—Sharing a high-speed spine can reduce installation and maintenance charges however may create protection and preservation conflicts. The shared spine, cable trays, and pathways could be designated in the CSI Division 25 05 00: regular Work results for integrated Automation.

    the usage of easy to transmit records and internet—LED lighting luminaires are coming to market with mild fidelity (Li-Fi) wireless communications, using seen mild, infrared, or ultraviolet spectrums instead of radio frequency (Wi-Fi). The lights can also get hold of their power and communications over a single Ethernet cable (vigor over Ethernet, or PoE). Even when the lights are perceived as off via the eye, full statistics-communications rates are possible.

    Some luminaires additionally combine occupancy sensors and temperature/humidity sensors, which reduces wiring costs for the built-in lights, lighting controls, records, protection, and HVAC handle systems. The Li-Fi communications are line-of-sight, so the insurance is an identical as the gentle distribution and fewer users share a knowledge channel, in order to deliver larger transmission charges. The Li-Fi is additionally greater cozy because it doesn't transmit via opaque partitions (see figure four).

    Geofencing—This location-based mostly app or software uses GPS, RFID, Wi-Fi, or mobile statistics to trigger a preprogrammed motion when a cellular machine or RFID tag enters or exits a virtual boundary setup round a geographical region. Geofencing may be used with an IoT wise thermostat, as an example. When the geofence senses an RFID tag or instant machine is current, the occupied handle sequence could be activated. The occupied sequence could be precise to set the temperature or increase the air flow price (in addition to spark off occupancy-controlled plug hundreds, set a lighting level and color temperature through time of day, and control motorized hues).

    IoT or networked electrical energy meters—These can supply actual-time energy usage and height demand and check electrical billing. The display of energy utilization to the occupant also has been shown to reduce power consumption. The submeters may also be used as measurement and verification of energy-conservation measures. The digital meters can computer screen individual feeder breakers or panelboard circuits, so you can get records for U.S. eco-friendly constructing Council’s LEED dimension and verification EAC5.

    vigor-pleasant meters—These can seize and analyze voltage spikes, dips, and harmonic distortion, which might be hazardous to electronic equipment. Having the electronic meters networked guarantees that meters could be read on a continuous basis and permits the actual-time guidance for use by means of numerous subsystems to send warnings and alarms by the use of instant contraptions for operations and preservation. height-demand statistics could tell the BMS that the techniques should still be adjusted to stay away from growing a new electrical peak demand. The meters also can be used for decisions about load-shedding of noncritical hundreds when working on a standby generator. The IA equipment may be programmed to allow a smaller generator to be put in and serve the building by load-shedding and demand-limiting the electrical and HVAC systems.

    Optimizing BIM

    The task’s BIM mannequin—when fully used—contributes tremendously to the integration of electrical and HVAC designs. The BIM machine mannequin, for instance, would encompass the properties required for the HVAC electrical and IA specification and schedules used all through design building, development documents, and trying out and commissioning. BIM models may still have actual device dimensions, coil-pulling clearances, and working clearances to help in coordination and code-compliant installation. The BIM residences could be linked to the diverse schedules to aid in coordination, so as an example, when the mechanical clothier adjustments a horsepower, the electrical-panel schedule updates.

    The electrical properties would include voltage, number of phases, obvious load volt-amps, starter or controller classification, and disconnect classification. Electrical machine working clearances and dedicated areas above switchboards, panelboards, motor controls, and gadget should be blanketed. The HVAC designer can use the BIM mannequin to calculate the heating and cooling hundreds for a space, together with the designed lighting load. The house-occupancy lighting controls can be built-in with the BMS and HVAC controls to change from unoccupied to occupied manage sequences, optimizing power reductions within the annual energy-modeling application. 

    first rate for owners and occupants

    The main drivers for IA consist of power charges, greater advanced constructions, managing enormous amenities with fewer full-time body of workers, far off administration, and inspecting more facts to make more suitable choices. Occupant expectations for consolation and communications also drive the enlargement of IA as more americans bear in mind what a smart constructing should supply. IA additionally will expand as communique networks grow faster and less expensive per element.

    via collaborative planning and using the a lot of equipment and applied sciences purchasable, electrical and HVAC designers can contribute to any constructing’s IA by means of optimizing the mixing of their respective systems. via doing so, they create a design that occupies much less space, lowers put in costs, and reduces power and operating prices—all decent news for the proprietor.

    John McGonegle is a senior electrical engineering professional with IMEG Corp. he's chargeable for the enterprise’s electrical design first-class and technical expertise and offers quality control reports.

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