| HC HVAC & R Network Abstract: | | | | work situation of the air conditioning control, |
| Objective: To study the intelligent building HVAC | | | | thermal inertia for the theaters and other large |
| systems to achieve effective way of energy | | | | air-conditioned places, by a high coefficient of P D |
| saving and optimization methods. Methods: | | | | work to improve the air conditioning unit on the |
| Comparison of major energy-consuming units | | | | load change response time is not enough to solve |
| within the building energy-saving measures. The | | | | the problem. Then you can use two-level control, |
| results achieved on the BA control system | | | | respectively in air conditioning and indoor air Road, |
| (mainly HVAC system) Sensor , Actuator, | | | | installation of temperature sensors, the room |
| controller, network, optimize certain aspects of | | | | temperature set to complete by the main DDC |
| the classification, from the system structure and | | | | controller, valve driven by the Deputy DDC |
| parameters of the various possible to find the | | | | temperature sensor under the air duct and the |
| best match to the best overall performance, | | | | main DDC's instruction to complete, due to |
| thereby enhancing the efficiency of the system. | | | | changes in speed wind tunnel temperature |
| Conclusion: The establishment of intelligent building | | | | changes in room temperature, this control method |
| HVAC system energy management and control | | | | to accelerate the system response to |
| system optimization of the basic starting point, | | | | temperature fluctuations. In the actual engineering |
| optimization principles and technical measures for | | | | design, BA saving control system for air |
| the realization of intelligent building energy | | | | conditioning can use a variety of means, such as |
| efficiency has important practical significance, BAS | | | | indoor and outdoor baking value comparison, the |
| system is the intelligent way to building energy | | | | concentration of carbon dioxide and other |
| efficient. | | | | pollutants in outdoor air test method to |
| Energy efficient building HVAC system | | | | determine, based on the regular schedule |
| optimization | | | | operations so. Engineering design flexibility as may |
| An overview of Intelligent Building Energy is a | | | | be necessary to achieve optimal results. For |
| worldwide trend and the trend is also pressing | | | | example, office, shopping malls and so on, |
| China's reform and development requirements of | | | | summer and autumn in the early morning when |
| the 21st century architectural career development | | | | the air handler through the program starts a new |
| a priority and focus. Energy conservation and | | | | domain Fans ), Using cool outdoor air for indoor |
| Environmental protection Is the key to achieving | | | | ventilation precooling overall, saves the new wind |
| sustainable development. Theory of sustainable | | | | energy and also enhance the indoor air quality. |
| development, building energy efficiency is the key | | | | 2, the optimization of control BAusually follow the |
| to further improve energy efficiency, building | | | | central principle of centralized control station. |
| energy efficiency standards irrespective of | | | | Sometimes has its inconvenient side. In some |
| whether the formulation of specific projects or | | | | cases (such as conference rooms) will be air |
| engaged in the design, should be to improve the | | | | conditioning, ventilation system parameter setting |
| energy efficiency of building energy efficiency as | | | | function placed in the scene may be more |
| the focus. Intelligent building is no exception, the | | | | consistent with the needs of users. DDC itself |
| owners of the Intelligent Building direct motive is | | | | does not provide this functionality, you need |
| highly modern, comfortable and at the same time | | | | specialized components to achieve. VRV type of |
| to achieve a high degree of Energy A significant | | | | function close to the device control panel settings |
| reduction in consumption in order to achieve | | | | to room users tremendous convenience and |
| savings of building operating costs. | | | | comfort, where necessary to actively use. |
| 2, Intelligent Building HVAC Energy Management | | | | 3, direct digital control (DDC) optimization |
| and Control System Optimization | | | | Mainstream BA system supplier can provide |
| Intelligent Building Building Automation System will | | | | different sizes and capabilities of the DDC, |
| be building a system integrating all the equipment, | | | | freezing rooms, thermal monitoring station is |
| information sharing, integrated management, its | | | | where many large-scale control should be given |
| role and benefits are enormous, and efficiency to | | | | priority to reduce the failure rate and the |
| achieve these effects, we must implement | | | | communication between the controller. On the air |
| optimization, building intelligent Chemical industry | | | | handler, new fans, fans generally use medium or |
| Design and optimization process compared to | | | | small, the controller can be. In recent years, |
| conventional design, has the following | | | | programmable logic control device (PLC) has |
| characteristics: 1) possible from the system | | | | progressed rapidly, their application is no longer |
| structure and parameters to find the best match, | | | | limited to industrial situations, the air conditioning |
| Shi best overall performance, thereby enhancing | | | | and ventilation equipment, control engineering field |
| the system Xiaoshuai, reduce investment and | | | | should not be excluded. |
| operation costs ; 2) is on the system and its | | | | 4, control network optimization Scalability and |
| quantitative process model simulation, reducing | | | | flexibility to meet under the premise of controlling |
| control areas, improve reliability and stability, to | | | | the network topology should be as simple as |
| minimize the probability of failure may limit the | | | | possible, clear, irrespective of the RS485 bus or |
| system response output optimization; to save | | | | bus control network based on LonTalk is true. |
| energy by optimizing the control scheme aims is a | | | | Branch, multi-grade network management |
| kind of "active energy", which is different from | | | | complexity and low reliability. LonTalk bus in |
| the wall structure, windows and doors and setting | | | | theory could form an arbitrary topology |
| the transformation in the form of "passive energy | | | | networks, routing design of this randomness, if |
| conservation." | | | | used properly, in engineering practice is still a |
| III BA intelligent building system optimization | | | | technical risk, and may increase the system's |
| methods (mainly for the HVAC system) | | | | investments. Minor works as far as possible the |
| 1 Optimization of control strategy Air processor P | | | | use of bus-based Rs485 control network, a "hand |
| DDC usually work D control, select the | | | | in hand" of wiring, large-scale projects can be |
| appropriate parameters P D work and stable | | | | considered a ratings floor. |
| operation of the air conditioning system is critical. | | | | 5, BAS control center BAS control center |
| High coefficient of P workers D, air-conditioning on | | | | responsible for monitoring the air-conditioning, |
| indoor temperature fluctuation response curve | | | | ventilation, power systems, general and fire |
| steep, reaches the set temperature of the | | | | control, security surveillance sharing a room. Since |
| transition process shorter; opposite low coefficient | | | | the room is usually far from the freezing room, |
| of P workers D, reaches the set temperature of | | | | boiler room, where the remote operation of these |
| the transition process longer. But not P D | | | | key devices is not appropriate. Recommended |
| coefficient the higher the better work, otherwise | | | | practice is to freeze-site control room, engine |
| easily lead to instability of DDC control system, | | | | room and boiler room and the other to set a |
| the performance of the indoor temperature | | | | monitoring sub-stations, by the sub-station is |
| oscillation and the water side Electric control valve | | | | responsible for freezer, boiler monitoring, and the |
| Periodic back and forth movement can not be run | | | | sub-station functions authorized for the cold and |
| at a fixed opening. P D can solve most of the | | | | heat source equipment limitations. |