简体中文Guangzhou KEZHONG Ventilation Equipment Co., Ltd.
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Guangzhou KEZHONG Ventilation Equipment Co., Ltd.
Contact: He Junhua (business manager)
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Address: Zhaoqing Gaoyao Duzhen waist Kong community (over the sea longan Island) Six
 

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Industrial plant design to enhance ventilation problems and research

Ventilation plant design is a key element of enterprise HVAC plant layout, this paper discusses some situations in the plant effective ventilation and ventilation equipment in the generated layout, and noted some improvement methods.

Keywords: shortness of breath into the stream; rainy problem; indoor environment [This switched: lunwen.1kejian.com]
natural ventilation natural ventilation into the unorganized and organized natural ventilation, natural ventilation means organized into reasonable arrangements, location and size of the exhaust port, the outdoor air through an adjustable windows, holes, have regular flow through life or work zone natural ventilation. Mechanical ventilation is defined by the composition of fans and ventilation ducts for the realization of ventilation systems and settings. Industrial plant construction area, the staff are unevenly distributed, ventilation designed to meet the requirements under the premise of the working environment a priority natural ventilation, help to reduce energy equipment operation. When mechanical ventilation to be set to a reasonable set ventilation system according to the requirements of construction and industrial plants.
One, organized natural ventilation design problems and improvement measures
(A) rational design of intake and exhaust port area.
plant natural ventilation is the wind pressure generated heat and pressure and the use of outdoor air flow temperature difference between the air inside and outside the plant formed when that continuous exchange of air inside and outside the plant, forming a natural ventilation. However, due to the wind pressure by natural conditions, has more variability, ie no wind pressure when there is no wind, it should not be used as a power plant for natural ventilation considerations. Natural ventilation in the plant design must be reasonable coordination intake and exhaust port area, and strive to the air intake area of ​​not less than the exhaust port area, which should be to increase extremely important and effective technical measures the effect of natural ventilation. However, in actual engineering design, some of the main processing plant, due to the lack of careful rational planning, resulting in public auxiliary facilities construction and welfare buildings tightly around the main plant, packed, so the plant can lose a large opening into the valuable position air intake, and plant natural ventilation design. It did not carry out a research scrutiny, just to accommodate the established status quo in architectural design, whether rational or not, negative desperately enlarged skylight area, the roof height increased to about 8m, resulting in insufficient intake port area of ​​the exhaust port area 1/3, so that natural ventilation plant pattern formation extremely unreasonable situation. Although natural ventilation for the plant construction skylight adds a lot of investment, but did not get proper ventilation. [This article switched: lunwen.1kejian.com]
(B) try to avoid flow problems into shortness of breath.
the so-called flow into shortness of breath, refers to the intake port into the fresh air inside the building, before the job did not enter the area range, it has been heated and rises to the roof vent exhausted to the outside of the phenomenon. Obviously, this intake, did not play to improve air quality and work area work area improvement of thermal environment. Therefore, in order to improve the plant natural ventilation, should try to avoid this phenomenon into the stream of shortness of breath.
(C) must be taken to solve the problem of ventilation skylights rainy.
In recent years, often rainy ventilation skylights serious problems, causing some damage to the production. Natural ventilation plant designed to solve the problem of ventilation plant, has brought rainy malpractice, which is the use of plants function unacceptable. Therefore, the design must be addressed seriously. Now commonly used rectangular skylight ventilation. In the previous design, the rectangular skylight or ventilation port is provided in a vertical skylight flashings, skylights or horizontal opening set piece rain, rain set in which the level of the mouth piece approach, regardless of ventilation or anti Turbulence effects are better than the former, so the industrial plant used widely.
Second, the mechanical ventilation design problems and improvement measures
(A) mechanical ventilation characteristics.
natural ventilation pressure force small drawback is that, subject to the conditions of indoor and outdoor large impact, and mechanical ventilation, although energy consumption, but the advantage is artificially regulated indoor environment. Therefore, there are special requirements for certain plants, mechanical ventilation must be used the way, the exhaust air to enter and be treated to ensure the normal and reduce the impact on the outdoor environment job shop environment. Mechanical ventilation design is mainly based on indoor and outdoor air parameters, technical requirements, environmental requirements and the specific requirements of the owners and the like. Below we have contacted the tire manufacturing plants and other industrial plants HVAC design experience to summarize elaborate.
(B) Factors to consider when setting up the plant mechanical ventilation.
Most of the plant due to the use of different functions, covering, inter-column span and plant height relatively large internal process plant equipment and complex distribution platforms, lighting a larger number of windows and doors industry, plant expansion and future alterations etc., mechanical ventilation design must be considered various factors, a reasonable set ventilation. The general plant prioritize natural ventilation, mechanical ventilation is set at natural ventilation can not meet the requirements of the situation, process equipment and piping for complex single plant, widely used set rooftop exhaust fan ventilation, spacers entered the louver naturally or set up a rooftop wind turbine inlet air intake. For multi-storey factory, you can set a wall or ceiling supply and exhaust fans. If you set the sidewall entered the louver, a logical set the height of the inlet louvers to prevent external dust from entering the interior through the louvers plant, especially in coastal areas to set up a common area of ​​the plant typhoon, rain is also possible through the inlet louvers into the interior of the plant Therefore inlet louvers need for measures such as rain and dust. Set for roof ventilators way, I believe that although energy for ventilation, but the lower part of the plant personnel activities of the regional air quality improving effect is not ideal. Also note that the short-circuit problem into the exhaust fan when the roof setting. I had encountered in the work owner feedback leaking roof fans, in this regard we need to do in addition to the civil construction waterproofing, the ventilation facilities designed to set up rain on the roof fan. Many process equipment and piping inside the plant, plus building to the sewer and electrical bridge, often intricate piping, ventilation ducts and a larger size, line space large, so that ventilation fans pipeline generally shorter, to avoid too much interference problems between pipes. Ventilation design should be a reasonable set ventilation rate according to the different functional plant, and for the doors and windows more often in the open state of the plant, you need to check the doors and windows for air leakage ventilation effect. At the same time the plant for different purposes, positive and negative pressure within the different requirements of the plant, especially for some large factories, the different uses of the plant is often disposed adjacent to each other need to be considered when designing ventilation affect adjacent plant ventilation. In addition, we need to consider when setting ventilation position here, you can partially provided to enhance ventilation duct dead air flow.
(C) mechanical ventilation and smoke exhaust, dust and air conditioning systems coordination.
smoke partition plant is often divided by civil Liang, given the anti-ventilation exhaust pipe size is larger, more space, if you will take up more space set apart, and therefore the general ventilation smoke control system, but the plant is often a system with several smoke partition, so ventilation and smoke control system electrical control will put forward higher requirements, control is more difficult to grasp. For room ventilation is not provided and presented in addition to high-temperature exhaust fan in the selection of the fan requirements, in accordance with regulatory requirements, the fan needs to be fire and smoke protection measures. For workshop internal cleanliness requirements or excessive harmful gases part, according to the relevant state departments of indoor and outdoor pollution related specification, often do dust purification generally designed to do a new wind blowing, return back to the outdoor air is treated, At this time the amount of dust in the air and ventilation air flow combined with the need to consider a reasonable set of supply and exhaust capacity and supply and exhaust ports, minimizing harmful contamination of the interior to ensure that there is a clean room ventilation meet the standard requirements of the job requirements. Air supply tall plants generally use stations send cold, in the case of reducing energy consumption as much as possible to ensure the cooling requirements of personnel activities in the region, but also the introduction of some fresh air from the outside, in order to achieve at the station send cold air quality requirements ʱ?? Therefore ventilation need to consider the proportion of occupied stations send cold wind blowing part of the new section, as well as ventilation cooling effect on the loss of comprehensive smoke control, ventilation and air-conditioning new wind dust of various factors to determine a reasonable amount of ventilation, ensure ventilation to minimize energy consumption in HVAC and purification to meet the requirements of the premise.

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Hist:  UpdateTime:2013-01-24 15:26:51  【Print】  【Close
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