10 results about "Air changes per hour" patented technology

The invention discloses an exhaust system arrangement method and device based on a water pump house and a medium, and the method comprises the steps that space parameters in a building information model are obtained, and the minimum exhaust air rate of the water pump house is calculated through a ventilation frequency method based on the space parameters; the space parameters comprise room area, floor height, beam height and obstacle position information; obstacle distribution in the water pump house is recognized, the priority of a passing area is defined, and an air pipeline routing path is generated based on a path planning algorithm; according to the minimum exhaust air rate, the route of the air pipeline and a preset air speed limit value, air pipe component parts are calculated, fan parameters corresponding to an exhaust system are selected, and the sectional area of the air pipe is determined; the fan parameters comprise model parameters and air volume; and according to the sectional area of the air pipe and the fan parameters, the corresponding air pipe component parts are automatically matched, and according to a preset standardized connection rule, the air pipe component parts are subjected to spatial layout combination.

The invention relates to the technical field of building intelligent heating and ventilation system design and software development, and provides a fresh air system wiring method and system.The fresh air system wiring method comprises the steps that a building space model is analyzed, and space structure parameters of a room are obtained; according to the space structure parameters of the rooms, on the basis of preset air quality standards and building specifications, the ventilation times or unit area air volume values corresponding to the different rooms are automatically matched, and the fresh air volume and the return air volume of each room are calculated; according to a room type matching arrangement rule, determining an air supply / exhaust dominant strategy, generating an air port candidate position set meeting a preset obstacle avoidance rule in combination with room structure obstacle data and an avoidance condition, and outputting room air port coordinates and installation parameters based on an air quantity demand and a candidate position scoring result; and building the building space into a node network, defining a communication relation between nodes and an edge weight, and generating an optimal air pipe arrangement path from the air port to the host through a path planning algorithm.

The invention discloses a method for predicting decoration pollutant concentration and identifying a main pollution source based on a ventilation environment, and belongs to the field of material pollutant monitoring. The method for predicting the pollutant concentration comprises the following steps: determining the type of a decoration material according to a design scheme, and constructing a data set; establishing a quantitative relation between the pollutant equilibrium release amount and the bearing rate according to the data set; the pollutant concentration of the decoration material in the closed environment is obtained; when the ventilation influence is considered, a quantitative relation of ventilation times is established; and obtaining the predicted concentration of the pollutants of the decoration material considering the ventilation influence. The invention further provides a method for identifying the main pollution source. The method has the beneficial effects that the method can adapt to different ventilation conditions, and the accuracy and reliability of concentration prediction are improved; decorative materials which have great influence on indoor air pollution can be recognized, and indoor pollution sources are reduced.

Methods and systems for decontaminating an aircraft cabin and providing a safe re-entry indication are described. Methods and systems for decontaminating an aircraft cabin and providing an indication to provide confidence that re-entry after an operation is safe are described. These methods and systems are based on utilizing outside air and / or filtered air to reduce the concentration of infectious agents within the cabin. In some examples, a method is performed following a contamination event (e.g., the presence of a patient in flight) and / or as part of a scheduled service (e.g., between flights). The amount of time the system operates to introduce a compound into the cabin is specifically calculated to reduce the proportion of remaining infectious agents to below a desired level, thereby reducing the initial concentration of contamination within the cabin. The duration of the decontamination depends on the cabin volume and the incoming air flow rate. For example, after nine minutes of flowing incoming air at 20 air changes per hour, the proportion of remaining air will be less than 5%.

The embodiments of the present invention disclose a ventilation control method, device, and storage medium for a transformer substation, which are applied to the field of power system technology and can solve the problem of how to accurately control the supply and exhaust fans to ventilate the transformer substation. The method includes: continuously obtaining the actual load rate corresponding to the transformer substation at multiple moments within a preset time period; determining the total waste heat of the transformer substation within the preset time period based on the actual load rate corresponding to each moment; obtaining the outdoor air temperature value through a temperature sensor; determining the real-time ventilation frequency within the preset time period based on the total waste heat and the outdoor air temperature value; and controlling the fan to ventilate the transformer substation based on the real-time ventilation frequency.

The invention relates to a comprehensive pipe gallery jet fan position and angle optimization arrangement method based on a response surface method, and the method is characterized in that the method sequentially comprises the following steps: response surface experiment design, CFD sample simulation, response surface model construction, multi-objective optimization solution and optimal scheme verification. Wherein the response surface experiment design comprises variable definition, design method and sample size determination; the variables defined by the variables comprise the mounting position of the jet fan in the length direction of the comprehensive pipe gallery, the mounting angles of the jet fan on the upper and lower wall surfaces of the comprehensive pipe gallery, the mounting angles of the jet fan on the left and right wall surfaces of the comprehensive pipe gallery and the ventilation frequency; the design method is a Box-Behnken design method, and the Bhnken design method is a Bhnken. The sample size is four variables and three levels, and totally 27 samples are obtained. According to the method, optimization of airflow organization in the comprehensive pipe gallery can be achieved, the uniformity of temperature and humidity distribution is improved, the risk of local high temperature and high humidity is reduced, the ventilation efficiency is improved, and a ventilation strategy dynamically adjusted according to monitoring data or environment changes is achieved in an auxiliary mode.

The invention discloses an air pressure and ventilation monitoring method and system for a control area and a supervision area of the nuclear medicine department, and relates to the technical field of nuclear radiation protection. In the system, firstly, area types and alarm threshold values are configured for different places of a department of the nuclear medicine department through a system configuration module, and according to a department personnel organization structure, an alarm threshold value is set; account information and access authority of each user are configured; then, ventilation condition monitoring data of each place is collected and recorded through a data collection module, and a relative air pressure value and the number of ventilation times can be determined through a data processing module according to the ventilation condition monitoring data of each place; and finally, according to a calculation result and an alarm threshold value, an alarm management module triggers an alarm state to remind a user to take treatment measures in time and carry out alarm recording. According to the scheme, informatization, digitization and visualization implementation of the ventilation monitoring scheme is realized, and the guarantee of the environmental safety of the nuclear medicine department is greatly enhanced.

The invention discloses a high and large space air conditioner energy consumption calculation method and system based on seepage wind influence simplification. The method comprises the steps that a CFD numerical simulation model and an air conditioner energy consumption calculation model are constructed; performing simulation calculation on a plurality of working conditions to generate carbon dioxide distribution data and total permeation air volume; the air conditioner energy consumption calculation model is divided into multiple types of partitions; calculating ventilation times according to the total permeation air volume; and calculating annual air-conditioning energy consumption according to the ventilation times. According to the method, the CFD numerical simulation is combined with the building air conditioner load calculation software, so that the accuracy of the CFD simulation is utilized, the high efficiency of the building air conditioner energy consumption calculation software is exerted, and the calculation efficiency and accuracy are effectively improved; the indoor space is finely and virtually partitioned, the number of times of unorganized permeation air ventilation is reasonably set, and the difference of permeation air influences of different areas of the tall and large space of the building is fully considered, so that the calculation result of the air conditioner energy consumption is more practical.

The invention provides a method for calculating the daily door-opening ventilation times of temperature-control hall-penetrating of a cold-chain logistics refrigeration house, which is based on theoretical numerical calculation and is combined with the actual condition of logistics operation, so that influence factors of the daily door-opening ventilation times of temperature-control hall-penetrating of the cold-chain logistics refrigeration house can be comprehensively and reasonably understood. The method comprises the following steps: (1) determining summer outdoor atmospheric pressure of a place where a cold-chain logistics refrigeration house engineering project is located; (2) calculating an atmospheric pressure correction coefficient; (3) determining the number of loading and unloading ports in the temperature control penetrating chamber; (4) calculating the area of a loading and unloading port; (5) calculating the temperature-control hall-penetrating net volume; (6) determining a kneading surface air inlet coefficient in the temperature-control hall-penetrating loading and unloading opening; (7) determining the same-period operation coefficients of all loading and unloading ports of the temperature control hall; (8) determining a door seal leakage coefficient of the temperature-control hallway loading and unloading port; (9) measuring the airflow velocity; (10) determining the working time of daily operation; and (11) calculating the daily door opening ventilation frequency of the cold-chain logistics refrigeration house temperature control penetration.

This application relates to an automatic air conditioning adjustment method, apparatus, computer equipment, storage medium, and computer program product. The method includes: detecting the indoor carbon dioxide concentration; determining the target air volume required for the room within a preset future time period based on the carbon dioxide concentration result; determining the indoor dew point temperature based on the current indoor temperature; determining the target outlet air temperature based on the dew point temperature; determining the target air exchange rate to meet low ventilation conditions based on the temperature difference between the current indoor temperature and the outdoor temperature; determining the correspondence between the air conditioner's energy consumption, air outlet frequency, and air outlet speed based on the target air exchange rate and the target outlet air temperature; and determining the target air outlet frequency and target air outlet speed based on the correspondence. This method can provide a more suitable air environment while maintaining a relatively reasonable energy utilization ratio, achieving a balance between suitability and energy saving.