地板辐射采暖与散热器采暖的对比分析

本文通过对地板辐射采暖与散热器采暖的对比分析,阐明了地板辐射来暖的可行性。     

浅谈住宅建筑采暖方式

本文首先对住宅建筑的两种采暖方式——低温辐射采暖系统和对流采暖系统的优、缺点进行比较;然后着重论述了低温辐射采暖方式的特点及其可行性。     

浅谈低温地板辐射采暖的应用

低温热水地板辐射采暖是在埋设于地板内的加热盘管内循环低温热水,利用温水的散热量来加热采暖房间的地板,以房间的整个地板作为散热面,实现向房间辐射采暖的一种供暖方式。它具有舒适、节能、隔音、节省室内空间、使用寿命长等优点。     

低温热水地板辐射采暖系统与节能技术

本文吸收引进国外成熟的先进经验,提出一种适合我国国情的低温热水地板辐射采暖技术。它与对流采暖方式相比,具有节能、节材、节约占地空间等特点。通过实践与测试的结果表明,这种低温热水地板辐射采暖技术在满足人们舒适的基础上做到降低能耗,具有推广价值。     

太阳能地板辐射采暖形式探讨及可行性分析

介绍了太阳能地板辐射采暖系统的特点，对其形式及原理作了简单探讨，并以济南地区太阳辐射量为参考，分析了太阳能地板辐射采暖系统的可行性，指出了该系统是完全可行、节能的一种采暖方式。     

地面辐射采暖设计及施工中应注意的几个问题

本文详细地论述了在地面辐射采暖系统工程中从设计到施工二方面应注意的具体问题。     

北方地区船厂节能减排能源综合利用探讨

分析了北方船厂用能的共性特点和传统的用能方式,结合企业技改实践的成功案例,就热泵技术解决生活用热和空调、柔强红外辐射加热为高大厂房提供热源采暖,取代传统锅炉采暖供热方式及有效利用空压机冷却水的余热作为液态二氧化碳加温系统热源和用天然气作为金属切割和热加工等项目,从节约能源,减少污染及相应的经济效益和社会效益等方面进行了探讨。     

谈低温热水地板辐射采暖

分析低温热水地板辐射采暖技术的优越性,叙述了在管材选用以及设计和施工中应当注意的 一些问题。     

地采暖环境模拟舱的研制

为了准确地检测地采暖环境下木质地板的甲醛释放量,研制一种模拟地采暖环境的模拟舱。主要介绍该地采暖环境模拟舱的结构组成和工作原理,以及运行测试结果。结果表明,该模拟舱的温度及相对湿度波动范围都在1 m~3气候箱法允许范围内,地板上下表面存在温度梯度,可模拟真实的地面辐射供暖情况。应用模拟舱对浸渍纸层压木质地板和多层实木复合地板的甲醛释放检测值,高于常规1 m~3气候箱法检测值,且低于气候箱整体加热方式下的检测值,能更真实地反映地采暖用木质地板的甲醛释放情况。     

浅谈低温地板辐射采暖技术的应用

全文着重阐述交联软管供暖系统在低温地板辐射采暖技术中的应用,以及在运行过程中所体现的各项优点和适用的范围。     

地暖供热的发展空间和应用

随着社会的发展及人们对节能低碳生活的重视，大量的新技术在越来越多的行业应用起来，供暖行业也不例外。在供暖形式上人们改变了传统的散热器供暖方式，而是采用地暖供热。地暖供热：即将加热管安装在地板以下，用热媒不高于60℃的热水使地板循环加热。以辐射和对流的方式通过地面向室内供暖的供热方式。该文从地暖供热的优势、应用发展前景及使用时的注意事项几方面进行了综合论述。     

我国低温热水地板辐射采暖系统的现状与发展

从系统的特性参数、热源形式、调节及控制方式、优化设计等方面,介绍了近几年我国低温热水地板辐射采暖系统的研究现状,指出了研究中存在的一些问题,并对低温热水地板辐射采暖系统的应用现状和今后的发展趋势进行了简单的分析。     

论低温热水地板辐射采暖的优势

论述了低温热水地板辐射采暖散热均匀使人热感舒适,且卫生条件好、高效节能、运行费用低、无噪音、热稳定性好、不占使用面积、维修量小等优点。     

Effects of radiational heating at low air temperature on water balance, cold tolerance, and visible injury of red spruce foliage

Recent studies have shown that winter needle mortality in red spruce (Picea rubens Sarg.) is increased by exposure to direct solar radiation, possibly as a result of photo-oxidative damage, accelerated winter desiccation, or reduced cold tolerance due to heating of sun-exposed needles. In an experiment at controlled subfreezing air temperatures of -10 to -20 degrees C, visible radiation was less effective than infrared radiation in producing needle desiccation and visible injury during freeze-thaw cycles. However, visible radiation produced a red-brown color in injured needles, similar to natural winter injury, whereas injured needles exposed to infrared radiation were yellow and injured needles kept in darkness were dark brown. Thus, visible radiation was necessary to produce the red-brown color of damaged needles, but not the injury itself. Needle desiccation was not strongly correlated with visible injury, but the pattern of variation in visible injury among trees and the positive correlation between electrolyte leakage and visible injury suggested that freezing damage following freeze-thaw cycles might cause the visible injury. This was confirmed by a second experiment that showed loss of cold hardiness in needles thawed by radiational heating for six consecutive days. Even with a constant nighttime temperature of -10 degrees C, six days of radiational heating of needles to above freezing caused a small (2.8 degrees C) mean decrease in needle cold tolerance, as measured by electrolyte leakage. Continuous darkness at -10 degrees C for six days resulted in an estimated 5.6 degrees C mean increase in needle cold tolerance. Freezing injury stimulated desiccation: cooling at 4 degrees C h(-1) to -43 or -48 degrees C increased the dehydration rate of isolated shoots by a factor of two to three during the first day after thawing. Within three days at 15 to 22 degrees C and 50% relative humidity, the mean water content of these shoots fell to 60% or lower, compared to 90% or greater for unfrozen controls or shoots subject to less severe freezing stress. In some but not all severely freeze-stressed shoots, accelerated needle desiccation and abscission were accompanied by a red-brown color typical of red spruce winter needle injury. We conclude that severe winter desiccation in red spruce may often be due to prior freezing injury, increased as a result of exposure to direct solar radiation. Furthermore, freezing injury in red spruce may sometimes cause desiccation and abscission of green needles.     

我国暖通、空调系统设备的发展趋势

我国空调设备具有多样性和复杂性,应在空调冷源、空气处理设备、空调末端产品、控制系统、机房专用机、家用空调、通风设备等方面开发新技术,新产品,在引进和消化国外技术的基础上,大力保护和发展民族产业。供热设备应开发适用性广的散热器,发展低温地板辐射供热方式和远红外辐射供热设备,研制适合中国国情的热计量手段。     

木材微波干燥缺陷产生原因及其预防措施分析

从木材介电特性、微波穿透深度、微波设备、干燥工艺等方面分析了木材微波干燥缺陷产生的主要原因,并从优化干燥器设计,改善微波场分布均匀性,控制微波辐射功率和辐射时间,改变微波辐射方式等方面探讨了预防干燥缺陷产生的主要措施,以期为木材微波干燥技术的研究和应用提供参考。