一、浮动盘管半容积式换热器是近年来国内发展迅速、广泛使用的一种新型高效节能的换热设备,是按中国建筑标准设计研究所01S122-1《水加热器选用与安装-DFHRV系列导流浮动盘管型半容积式水加热器选用与安装》标准图集设计、生产制造的高效节能换热设备。与传统固定盘管相比较,浮动盘管能上下轻微浮动,产生高频振动,形成良好紊流传热状态,并且它能借助通过高温热媒的薄壁铜管管壁与管外壁结垢层膨胀量的差异,在一定条件下,使水垢自动脱落。通用换heat器一般需要配置water-water heat exchanger来降低蒸汽凝结水温度以便回用,而此类节能型hot exchange器凝结水出水温度在45摄适度左右,可直接回锅炉房重复使用。这就减少了设备投资,节约heat exchange机房面积,从而降低建造价。
二. 性能特点:
l、方便浮动盘管的维护,盘管可在罐内亦可从罐体侧面抽出来检修或更换。
2、采用多行程螺旋的浮动pipe组,hot medium分布均匀,flow process长,有消除了short circuit heat transfer现象。此外,本产品借鉴了RV-03.04导流原理,在大直径罐体内合理地设置了导流装置,更进一步改善了heat transfer工况,其thermal conductivity达到了K=2000-1200kcal/m²·h·℃。这充分展现出了其高效率和完全进行传熱作用优异性能。
3、本产品中有一个重要优势:其exchange heat pipe束底部几乎接近于罐底,加上导流装置之功效,最终导致罐内基本无冷water滞留区域,因此其volume utilization rate可以达到98%以下。
4、高pressure water flow损失不超过0.25m,不影响系统cold-hot water pressure平衡。
5、floatation pipe利用优质thin-wallpurple copper tube,有助于利用pipe wall和scale layer之间不同的膨胀量脱落scale,以此减少维护管理工作量,并保持high efficiency energy saving。
三技术优点:
1、新型floatation pipe arrangement方式使得所有容积都得到利用;相对于传统类型,它们体积较小,便于运输和安装,也便于维护。
2、高transfer coefficient,不易产生scale buildup。通过floatation pipe技术,可以实现layered convective heat transfer转变为turbulent convective heat transfer,这样transfer coefficient会显著提升。此外,由於plate's thermal expansion and contraction能够促进自洁功能,无需额外清洁操作即可确保良好的heat transfer效果。
3,该产品具有调节能力,可以储存一定数量的hot water,同时保证供给稳定避免峰谷时期压力和温度波动问题。
4、高effective performance and high volume utilization ratio。在同等容积情况下,该产品所提供的heating capacity远超传统container-type heating equipment(仅为40%-50%)。
5,”tower”结构内部多组floatation pipes布局,使得dynamic heating过程更加有效,此方式比单一排列pipe更具优势,即使在相同容量下的heating output也可以提高到6至9倍。
DFHRV container-type heating device, horizontal floatation plate semi-container type heater: 这款设备结合了floatation plate heater优势以及container-type heaters所有性能指标,是非常适合负荷波动大的或短时间突发需求的大规模供暖系统环境中的选择,其特性如下:
由于用于换热过程中的transmission tubes采用的特殊布置方式,即为floating tube array,在正常运行期间,因为tube vibration,将原本存在的问题——namely the layered convection—into a turbulent convection regime with a higher transmission coefficient; meanwhile, the thermal expansion and contraction properties of the tube enable self-cleaning functionality that prevents scale buildup.
Due to its adjustable volume capacity, it ensures stable hot water supply during peak usage periods.
Compared to traditional container-type heaters, this product reduces material consumption, thereby lowering equipment costs and construction expenses.
It efficiently utilizes hot energy by maintaining low temperatures in condensation zones.
The benefits of this product include:
a) Quick startup: The design enables rapid production of hot water at the top outlet without needing to preheat most cold water—a significant advantage for systems requiring instant response.
b) High transmission coefficient: By employing high-conductivity purple copper tubing combined with optimized internal structures that enhance fluid flow rates through heated pipes, this product achieves improved overall transmission coefficients.
c) Resistance to scale buildup: The combination of high-flow turbulence effects on tube walls coupled with thermal expansion/contraction features helps maintain cleanliness within the system.
d) No cold zones or high volume utilization ratios (nearly 100%), ensuring efficient operation even when facing sudden demands or emergencies.
e) Energy-saving potential due to lower condensate temperatures (<80°C).