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Method for calculating fresh air volume of single-channel multi-partition variable-air-volume air conditioner

A fresh air volume and multi-zone technology, applied in the field of variable air volume air conditioning, can solve the problems of increased fresh air energy consumption, energy waste, fresh air volume deviation, etc.

Pending Publication Date: 2019-04-16
武汉海翼科技有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

The high fresh air ratio of the system deviates the fresh air volume of most ventilation zones, increases the energy consumption of fresh air, and wastes a lot of energy

Method used

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  • Method for calculating fresh air volume of single-channel multi-partition variable-air-volume air conditioner
  • Method for calculating fresh air volume of single-channel multi-partition variable-air-volume air conditioner
  • Method for calculating fresh air volume of single-channel multi-partition variable-air-volume air conditioner

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Embodiment Construction

[0051] The following is a floor plan of an office, and the design adopts a single-channel reheating type VAV air-conditioning system. The plane has three outer district offices facing east, west and south respectively; two meeting rooms facing south and north, and three inner district offices facing south, north 1 and north 2. The air-conditioning plane is divided into eight ventilation zones. Among them, the east, west, south, and north 2 office ventilation zones are divided into three temperature control zones.

[0052] 1. Calculation of regional fresh air volume

[0053] Step 1: Calculate the number of people Pz and the area Az used in each area. According to the minimum fresh air volume Rp in the breathing zone and the fresh air volume per unit area Ra calculated by experience, the fresh air volume in the breathing zone is calculated according to formula (2).

[0054] The second step: According to the air distribution form of the system, the regional distribution effici...

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Abstract

The invention relates to a method for calculating fresh air volume of a single-channel multi-partition variable-air-volume air conditioner. The fresh air volume calculation idea of the system comprises: (1) the per capita fresh air volume and the unit area fresh air volume of each partition are determined; calculating the fresh air demand of the system; (2) calculating regional fresh air volume according to concepts of a respiratory region, regional air distribution efficiency and the like; and (3) calculating the fresh air volume of the multi-partition system according to the concepts of regional ventilation efficiency, critical ventilation partition, system ventilation efficiency and the like. Two methods for calculating the fresh air volume exist all the time: one method is to take thehighest fresh air ratio in each subarea as the system fresh air ratio, so that the fresh air volume of the ventilation subarea is large, and the fresh air energy consumption is increased; In another method, the fresh air demand quantity of each partition is superposed to serve as the fresh air quantity of the system, so that the fresh air quantity supply of some partitions with high fresh air ratio requirements represented by critical partition positions is insufficient. According to the method, the critical partition fresh air supply is guaranteed, the multi-partition fresh air amount is minimum, and the goal of pursuing the design of the variable air volume air conditioner system all the time is met.

Description

technical field [0001] The invention relates to a method for calculating the fresh air volume of a single-channel multi-zone variable air volume air conditioner, belonging to the field of variable air volume air conditioners. Especially suitable for areas such as office buildings. Background technique [0002] In the variable air volume air-conditioning system, the multi-zone variable air volume air-conditioning system has always had a contradiction between the fresh air volume and the air supply volume of the zones. [0003] The most common way to determine the fresh air volume of the system is to simply superimpose the fresh air demand of each zone as the fresh air volume of the system, and send air to each ventilation zone with the average fresh air ratio of the system. This method will lead to insufficient supply of fresh air volume in some partitions with high demand for fresh air ratio represented by critical partitions. [0004] Another method is to go to the other ...

Claims

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Application Information

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IPC IPC(8): G06F17/10
CPCG06F17/10
Inventor 张俊美张博余楠冯毅戴元伦
Owner 武汉海翼科技有限公司
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