广州地区住宅通风技术研究
发布时间：2019-01-08 13:55
【摘要】：通风有助于减少建筑能耗，改善室内热舒适和室内空气品质。近年来对住宅建筑门窗的气密性要求提高，很难依靠门窗渗透实现室内卫生通风，住宅建筑面临空调使用时需要解决卫生通风的问题。另一方面，在室外温度适合开窗自然通风降温时，受建筑布局影响，部分房间通风量难以保证，无法实现降温的目的，在室外大风、降雨、空气和噪声污染时，甚至无法开窗利用自然通风进行降温，住宅建筑面临强化舒适通风减少空调运行时间的问题。为使住宅能高效地实现卫生通风和舒适通风达到节能和改善室内空气品质的目的，本文对广州地区的住宅通风技术及其节能效果进行了研究，主要完成了以下几项工作： 首先，基于通风降温，建立了可用于住宅通风设计的最佳通风换气次数预测方法。通过对广州近年来的住宅设计作广泛调研，获得卧室基本设计参数，，建立典型卧室几何模型。使用正交试验法确定模拟工况，通过DeST-h软件模拟分析卧室基本设计参数和换气次数对卧室冷负荷的影响，并通过多元线性回归建立了卧室冷负荷的预测模型，引入卧室最佳通风换气次数的概念用于住宅通风设计并给出其计算公式。广州地区10~21m~2的双人卧室，当通风节能变化率下限取10%/次和5%/次时，最佳换气次数分别为11.95~13次/h，21.95~23次/h，通风节能率分别为18~30%，35~55%。 其次，基于舒适、节能、室内空气品质的要求，从系统设计、硬件实现及控制策略等方面，研制了空调机和通风机联动控制的住宅通风空调系统，通过实验验证了系统按照控制策略及设定参数运行，室内温度和相对湿度均能保持在设定范围内，系统运行稳定可靠。并对通风空调系统、空调和自然通风三种工况下的室内热环境和耗电量进行了实验研究，当通风空调系统和空调房间室内热环境接近时，与空调相比，通风空调系统夜间开启室内上限温度为27~29℃时，测试期间每天节能率为20.93~61%。 第三，借助DeST-h软件计算变通风条件下住宅室内温度及冷负荷的功能，利用其计算结果，判断通风运行时段，并编写风机耗电计算模块完善住宅建筑通风空调系统耗电量综合评价方法，定量评价了某实际房间通风空调系统全年的节能效果，给出了系统回收期，系统夜间开启室内温度设定范围为26~29℃时，通风节能率为54.51%。 最后，采用PHOENICS研究了通风空调系统各设备不同布局下的室内热环境，给出合理布局的应用建议，为通风空调系统的应用提供参考。
[Abstract]:Ventilation helps to reduce building energy consumption, improve indoor thermal comfort and indoor air quality. In recent years, the air tightness of doors and windows of residential buildings is improved, it is difficult to rely on the infiltration of doors and windows to realize indoor sanitary ventilation. When residential buildings are faced with the use of air conditioning, the problem of sanitary ventilation needs to be solved. On the other hand, when outdoor temperature is suitable for natural ventilation and cooling with windows, due to the influence of building layout, ventilation in some rooms is difficult to guarantee and can not achieve the purpose of cooling. When outdoor wind, rain, air and noise pollution, Even can not open windows to use natural ventilation to cool down, residential buildings are faced with the problem of enhanced comfortable ventilation to reduce the operating time of air conditioning. In order to achieve the purpose of saving energy and improving indoor air quality efficiently, this paper studies the ventilation technology and its energy-saving effect of residence in Guangzhou area. The main works are as follows: firstly, based on the cooling of ventilation, a method of predicting the best ventilation times for residential ventilation design is established. The basic design parameters of bedrooms are obtained through extensive investigation of residential design in Guangzhou in recent years, and the geometric model of typical bedrooms is established. The orthogonal test method is used to determine the simulation conditions, and the influence of the basic design parameters and the number of air exchange on the cooling load of the bedroom is analyzed by DeST-h software, and the prediction model of the bedroom cooling load is established by multiple linear regression. This paper introduces the concept of the best ventilation times in the bedroom and gives the calculation formula for the ventilation design of the residence. When the lower limit of ventilation energy saving change rate is 10 times per hour and 5 times per hour, the best air exchange times of 10~21m~2 double bedroom in Guangzhou area are 11.95 / 13 / h 21.95 / h / h, respectively, and the ventilation energy saving rates are 18 / 30 / h and 3555 / h, respectively. Secondly, based on the requirements of comfort, energy saving and indoor air quality, a residential ventilation and air conditioning system is developed in terms of system design, hardware implementation and control strategy. The experimental results show that the system operates in accordance with the control strategy and parameters, the indoor temperature and relative humidity can be kept within the set range, and the system is stable and reliable. The indoor thermal environment and power consumption under the three working conditions of ventilation and air conditioning system, air conditioning and natural ventilation are studied experimentally. When the indoor thermal environment of the ventilation and air conditioning room is close to that of the air conditioning room, it is compared with the air conditioning system. When the upper limit temperature of ventilation and air conditioning system is 2729 鈩
本文编号：2404693
[Abstract]:Ventilation helps to reduce building energy consumption, improve indoor thermal comfort and indoor air quality. In recent years, the air tightness of doors and windows of residential buildings is improved, it is difficult to rely on the infiltration of doors and windows to realize indoor sanitary ventilation. When residential buildings are faced with the use of air conditioning, the problem of sanitary ventilation needs to be solved. On the other hand, when outdoor temperature is suitable for natural ventilation and cooling with windows, due to the influence of building layout, ventilation in some rooms is difficult to guarantee and can not achieve the purpose of cooling. When outdoor wind, rain, air and noise pollution, Even can not open windows to use natural ventilation to cool down, residential buildings are faced with the problem of enhanced comfortable ventilation to reduce the operating time of air conditioning. In order to achieve the purpose of saving energy and improving indoor air quality efficiently, this paper studies the ventilation technology and its energy-saving effect of residence in Guangzhou area. The main works are as follows: firstly, based on the cooling of ventilation, a method of predicting the best ventilation times for residential ventilation design is established. The basic design parameters of bedrooms are obtained through extensive investigation of residential design in Guangzhou in recent years, and the geometric model of typical bedrooms is established. The orthogonal test method is used to determine the simulation conditions, and the influence of the basic design parameters and the number of air exchange on the cooling load of the bedroom is analyzed by DeST-h software, and the prediction model of the bedroom cooling load is established by multiple linear regression. This paper introduces the concept of the best ventilation times in the bedroom and gives the calculation formula for the ventilation design of the residence. When the lower limit of ventilation energy saving change rate is 10 times per hour and 5 times per hour, the best air exchange times of 10~21m~2 double bedroom in Guangzhou area are 11.95 / 13 / h 21.95 / h / h, respectively, and the ventilation energy saving rates are 18 / 30 / h and 3555 / h, respectively. Secondly, based on the requirements of comfort, energy saving and indoor air quality, a residential ventilation and air conditioning system is developed in terms of system design, hardware implementation and control strategy. The experimental results show that the system operates in accordance with the control strategy and parameters, the indoor temperature and relative humidity can be kept within the set range, and the system is stable and reliable. The indoor thermal environment and power consumption under the three working conditions of ventilation and air conditioning system, air conditioning and natural ventilation are studied experimentally. When the indoor thermal environment of the ventilation and air conditioning room is close to that of the air conditioning room, it is compared with the air conditioning system. When the upper limit temperature of ventilation and air conditioning system is 2729 鈩
本文编号：2404693
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