Research and Design of Small Cooling System Based on Solar Energy
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摘要:
在“双碳”背景下,结合我国西北地区太阳能资源丰富且炎热干旱的气候条件,研发了基于太阳能的1 kW小型降温系统。系统以水为介质,采用超声波将水雾化为1~5 μm云雾喷洒在房屋周围,通过蒸发吸热的原理对房屋周围环境进行降温加湿,通过设计光伏系统、电源与控制系统及水箱管道系统并在50 m2的房屋周围进行试验测试,结果表明此小型降温系统平均可降低环境温度6 °C,可使湿度达42.9%,验证了该系统对我国西北农村庭院家庭夏季降温增湿的有效性。
Abstract:Under background of "double carbon", 1 kW small-scale cooling system based on solar energy was developed in combination with rich solar energy resources and hot and dry climate conditions in Northwest China. The system took water as medium and used ultrasonic waves to atomize water into 1~5 μm clouds and mist was sprayed around the building, and building was cooled and humidified by principle of evaporation and heat absorption. Through design of photovoltaic system, power supply, control system, and water tank pipeline system, and the experimental test in a 50 m2 semi-open environment, results showed that this small cooling system could reduce temperature by 6 °C on average, and humidity was 42.9%, which verified effectiveness of this system in cooling and humidifying courtyard households in Northwest China in summer.
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Keywords:
- solar energy /
- rural courtyard /
- atomization cooling /
- system design
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表 1 体感温度与加湿量关系参考值
Table 1. Reference of relationship between body temperature and humidification
时刻 温度/°C 湿度/% 风速/(m·s−1) 体感温度/°C 11:00 22.10 39 1.32 20.08 12:00 19.80 36 1.32 17.42 13:00 21.50 38 1.32 19.44 14:00 20.80 34 1.32 18.56 15:00 21.30 38 1.32 19.74 表 2 负载组成及相关参数
Table 2. Load composition and related parameters
名称 电源类型 额定电压/V 额定功率/W 温湿度传感器 DC 12 0.40 水位传感器 DC 5 0.24 电磁阀门 DC 12 24.00 控制器 DC 12 12.00 超声波雾化器 DC 48 560.00 风机 DC 48 12.00 总功率 — — 608.64 表 3 甘肃光伏容量设计速查数据
Table 3. Quick reference table of Gansu PV capacity design
地区 水平辐射
量PHH/
(kW·h·m-2·d-1)最佳倾
角/(°)阵列辐射
量PHT/
(kW·h·m-2·d-1)光伏负荷/
直流负荷兰州 4.14 50 4.32 0.331 天水 3.93 46 4.12 0.347 民勤 4.42 52 4.98 0.287 敦煌 4.91 55 5.39 0.265 -
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