共查询到19条相似文献,搜索用时 403 毫秒
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本文旨在探讨水冷空调器在住宅中使用的节能潜力。设计了分体式风冷和水冷空调器性能的测试实验台,实验研究在不同的室内负荷和室外干球温度、相对湿度条件下,水冷空调器与风冷空调器的性能和节能效果比较。 相似文献
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《建筑节能》2015,(9)
针对南方湿热地区是我国夏季住宅房间空调器耗能的主要地区及空调器节能研究的重点地区,讨论了在现有国家标准所规定的室内侧空气试验工况值27℃DB/19℃WB下所设计的房间空调器在湿热地区使用时室内相对湿度偏高的原因,分析了设计进风空气参数对空调器设计的影响,以北京、广州两城市为例选取某型号压缩机进行的不同室内侧空气设计工况下房间空调器的能效比对比表明,以26℃DB/20℃WB作为室内侧空气设计工况可以更好地适应南方湿热气候条件对房间空调器的性能要求,设计的房间空调器具有更小的设备显热比和更高的能效比,建议修订房间空调器国家标准,考虑不同地区的气候差异对室内侧空气试验工况值做出不同的规定以促进房间空调器节能工作的开展。 相似文献
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夏季来临,人们都想使自己的居室保持理想的温度和湿度,使生活更加舒适,空气调节器应运而生.空气调节器简称空调器,有携带式、分体式、柜式和窗式四种.不但能供人们防暑纳凉,而且能自动调节加速空气流通.那么如何选购空调器呢?首先选购空调器规格时,主要应按房间面积大小及高度、房屋结构、室内人数等来考虑,一般地说,如果房屋结构符合一般标准,室内无发热设备,每10平方米面积不超过3个人,在要求室温约为27℃,相对湿度在50—70℃之间时,可按每平方米面积配置150—220千卡/时制冷量来选购适当规格的空调器.若要求室内温度为0℃左右,相对湿度为40%—50%之间时可按每平方米面积配置250—300千卡/时的制冷量来选用. 相似文献
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高效换热器不但可以减少空调器的重量,缩小其尺寸,而且可使空调器的噪声得到明显下降。空调器的噪声来自制冷压缩机和风机,随着压缩机制造水平的不断提高,其发出的噪声越来越低。国外七十年代中期的一些低噪声房间空调器,经我们测试,其高冷挡噪声与高风挡噪声相等,这说明压缩机工作时发出的噪声并不影响空调器整机的噪声。七十年代后期,分体式空调器的出现,使房间空调器的噪声得到更进一步的下降。压缩机放在室内的落地式空调器噪声只有45分贝左右,如日本松下电气公司的1、1.5、2马力落地式室内机组至于挂墙式、吊顶式室内机组出于安装方便及超薄型造 相似文献
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一、选购空调器需要考虑的几点 1.制冷量:空调器制冷量应大于或等于空调房间所计算出的总耗冷量,同时注意空调房间与空调器二者的负荷工况应相近,否则在空调温度湿度上会产生较大偏差。空调器的制冷量工况是:室内于球温度为27℃,湿球温度为19.5℃;室外干球温度为35℃,湿球温度为24℃。如果冷凝器采用水冷却,则进水温度应为28℃。 2.电源:用户电源应与空调器的使用电源相一致,否则会烧坏电机或出故障。 3.噪声:选购空调器,噪声目前要求在60dB以下。 4.耗电量:从家用空调器来说,用电量极为重 相似文献
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针对河北保定易县某农村居住建筑,实测研究碳硅聚合物固态电散热器的供暖效果和经济性。采用温湿度传感器连续测量室外、供暖房间、非供暖房间温湿度,采用电能表测量电散热器耗电量。测试时间为2021年1月7日18:00至26日10:00。测试期间供暖房间室内温度波动明显,最高室内温度为20.39℃,最低室内温度为6.98℃。供暖房间室内温度主要受用户自行调节电散热器启闭的影响。测试期间供暖房间室内相对湿度比较低。测试期间非供暖房间室内温度变化范围为0.04~13.15℃,室内相对湿度变化范围为23%~54%,空气湿润程度优于供暖房间。测试期间电散热器耗电量为331.4 kW·h,平均日电费为7.62元/d,基本不会对农村用户形成经济压力。 相似文献
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冬季实验室热环境数值模拟及热舒适性评价 总被引:1,自引:0,他引:1
本文基于实验室的使用特点,对实验室内冬季使用落地式空调器辅助散热器采暖方式,利用CFD软件对实验室内的气流组织及热环境进行模拟,结合对实验室内相关参数的实测值,分析室内温度场的分布特征,最终对冬季实验室的热舒适性进行评价。 相似文献
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为探讨热泵型空调器更换R290后的供暖特性,在重庆地区开展了供暖工况下充注R290空调器与原R22空调器的对比实验,测试了空调器的送回风温湿度、耗电量、风量等数据。研究了两组空调器的送回风温湿度差异及与室外温度变化的关系,比较了2台空调供热量、耗电功率及COP等数据。结果表明:在重庆地区热泵型空调中替代充注R290后,空调器制热效果良好,室内空气温湿度与原空调器处理的空气温湿度较为接近;但由于制冷剂质量流量减小,平均供热量降低14.6%;尽管COP整体降低了7.5%,但在运行稳定后COP能接近原空调器。 相似文献
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According to the temperature and moisture characteristics and current problems experienced in the Yangtze River Area, a temperature-humidity separate control air conditioner was developed. This unit can remove indoor sensible heat and latent heat load separately, and adjust indoor temperature and humidity respectively, thus improve indoor comfort and reduce energy consumption. The air-conditioner consists of an air cooling evaporator and a water cooling evaporator. Orthogonal experiments were designed to study the influence of outdoor temperature, indoor temperature, indoor humidity, compressor frequency, and refrigerant distribution ratio in air cooling evaporator (RDRAE) on the unit performance. The results showed that the dehumidification capacity ranged from 0 to 4.02 kg/h; the EER ranged from 2.71 to 4.57; the cooling capacity ranged from 6822 to 13,080 W. The results can help to make the control logic of the unit, and be used as the basis of energy consumption calculation. Units with temperature and humidity separate control could save about 15.6% of the cooling energy consumption against traditional residential air-conditioner, and 47.8% against the traditional residential air-conditioner that could control both indoor temperature and humidity. 相似文献
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对铝箔金属填料直接蒸发冷却空调机进行了实验研究。分析了进口空气干球温度、相对湿度对空调机降温及冷却效率的影响,为直接蒸发冷却式空调机性能的提高具有一定的参考意义。 相似文献
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A study was carried out to investigate the effect of heat-pipe air-handling coil on energy consumption in a central air-conditioning system with return air. Taking an office building as an example, the study shows that compared with conventional central air-conditioning system with return air, the heat-pipe air-conditioning system can save cooling and reheating energy. In the usual range of 22–26 °C indoor design temperature and 50% relative humidity, the RES (rate of energy saving) in this office building investigated is 23.5–25.7% for cooling load and 38.1–40.9% for total energy consumption. The RES of the heat-pipe air-conditioning system increases with the increase of indoor design temperature and the decrease of indoor relative humidity. The influence of indoor relative humidity on RES is much greater than the influence of the indoor design temperature. The study indicates that a central air-conditioning system can significantly reduce its energy consumption and improve both the indoor thermal comfort and air quality when a heat-pipe air-handling coil is employed in the air-conditioning process. 相似文献
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室内相对湿度对夏热冬冷地区新风耗冷量的影响 总被引:5,自引:1,他引:4
针对夏热冬冷地区住宅热环境特点,按节能住宅空调期和除湿期定义,建立了空调期和除湿期新风耗冷量的计算程序。该地区由于气候潮湿,新风耗冷量的计算应按空调期和除湿期分别进行,其中除湿期新风耗冷量与除湿方式密切相关。采用 TMY2逐时气象数据计算了夏热冬冷地区主要城市的新风耗冷量,揭示了降低新风耗 冷量的 基本途径,并重点分析了不同室内干球湿度下相对温度对新风耗冷量的影响。 相似文献
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针对变风量空调实际运行中出现的冷热不均问题,通过运行两种变静压、一种定静压控制策略下的变风量系统,对比分析室温、风量、风机频率、最大阀位、设定静压值与风机能耗的关系。结果表明:变风量箱在设计控制阀门的算法中除设定温度之外还需要考虑IAQ、相对湿度等因素;使用变风量空调之前应将室温降至设定温度后再打开自动控制系统,避免受到算法的延迟影响;定静压输送单位冷负荷需要消耗的电量,比测点靠近风机的变静压控制策略多7.8%,且降温效果较差;外界环境几乎相同的情况下,变静压策略中,静压基础点远离风机的控制策略较靠近风机的控制策略降温效果好,速度至少快14%,消耗电量几乎相同。 相似文献
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Indoor thermal environments and residents' control behavior of cooling and heating systems were investigated in Seoul, Korea and compared with the results of previous studies. Twenty-four houses in summer, six houses in autumn and 36 houses in winter were used in this study. The measurement of temperature, humidity and air conditioner usage behavior was carried out. The clo-value, thermal comfort, sensation and basic data of the houses were also investigated. The indoor thermal environment in the summer had a high temperature and a high humidity ratio compare to standard comfort zone. Most of the indoor thermal environments at the time of starting the air conditioner in the summer were out of the comfort zone. Some of the data recorded while the air conditioner was stopped were in the comfort zone, but in many cases the temperature was relatively higher than comfort zone. Most indoor climate distributions in the winter were in the comfort zone and the indoor climate in autumn coincided well with the criteria of the comfort zone. Compared with results of previous studies in these 25 years, indoor ambient average temperature in winter has increased and the comfort temperature has increased in the heating period and decreased in the cooling period. This result indicates that the development of an HVAC system has created an expectation of comfort for residents and has shifted their thermal comfort zone warmer in winter and cooler in summer. 相似文献