热量表选型-兰吉尔

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处理结垢影响 Handle the soiling effect
耐久性测试认证长寿命 Durability test to certificate long term use
长期稳定的热量表
Long term use of Heat Meter
减少并延缓结垢:
Reduce the soiling chance and delay soiling
Long term use of Heat Meter
处理结垢影响 Handle the soiling effect - 热表随时检测超声波信号幅度
integrated design, monitoring the ultrasonic - 当超声波信号减弱时,自动增强信号强度
Automatic amplification of ultrasonic signal
兰吉尔热量表经过4000循环周期测试结果
L+G T230 Heat Meter Typical Pressure Loss
选择一款好的热量表可以让你 放心, 安心, 省心!
Choose a good heat meter make you
Rest assure Peace of mind
谢谢!
100:1
overload qs : qp
2:1
启动流量:开始计量的起始流量
star q起动
2‰ x qp
如: qp 1.5 m³/h
3 L/h
15 L/h
流量
1,500 L/h 3,000 L/h
q起始
qi
1 : 100 1 : 500 或 1 : 1000
1:2
qp
qs=2qp
为什么按照常用流量选择热量表?
热量表选型 Heat Meter Selection
2011年12月
徐竹 热量表产品经理
兰吉尔仪表系统(珠海)有限公司 电话: 010 -83915250-88 邮件: teresa.xu@landisgyr.com
热量表的选型关键因素
Key selection point for Heat Meter
安装环境是否潮湿,高温? higher humidity and high temperature?
周围是否有强磁场或泵? Any Strong magnetic field or pump
注意热量表的安装供回水位置及水流方向 Heat meter install in flow or return and direction
•客户服务热线:(010)83915250 •热表服务电邮:heatmeter@landisgyr.com
期望越小越好 expect pressure loss is as smaller as possible
热表的安装位置
Installation place
关注热表是否需要前后直管段?是否允许垂直安装或倾斜安装? required straight pipe before and after?allow install HM in vertical or inclined?
低压损的热量表
Lower pressure loss Heat Meter
压损:在给定流量下,热量表所造成的压力降低值 pressure loss
压损和流量有关 it is related with qp
压损与流量管内超声波信号反射通道的设计相关 it is depend on the flow tube design for ultrasonic signal refection cancel
电池寿命支持每天30次(battery support 30 times per day)
按照常用流量选择,宽测量范围的热量表
Choose HM by qp and choose wide measurement range
量程比:热量表常用流量与最小流量之比
measurement rate qp : qi 过载能力:最大流量与常用流量之比
0.5m3/h could heat 100m2 100m2 apartment, pipe system design as DN20 or DN25 If use DN25 HM, 0.5m3/h = 1/7 * qp Work in smaller area of flow, the accuracy will be not good. selection suggestion: Heat Meter with DN20 qp=1.5m3/h
区分温度探头的供回水位置 temperature sensor installed in flow or return
长期稳定的热量表
Long term use of Heat Meter
减少结垢并延缓结垢 Reduce the soiling chance and delay soiling
热量表实现智能测量周期,流量快速变化时,缩短温度测量周期, 更加精确计量快速升温及降温时的热量。 Complete HM has intelligent, adaptive temperaturemeasuring cycle,to get higher accuracy of energy.
智能测量周期
- 内螺纹DuraSurface专利设计,降低内壁结垢的影响
DuraSurface patented design, negligible soຫໍສະໝຸດ Baiduling impact
长期稳定的热量表
Long term use of Heat Meter
长期稳定的热量表
Long term use of Heat Meter
- 改善水质
热力公司
improve water QA
by heating company
- 改善表的材质
表制造商
use the new material by manufacture
- 改善表的加工工艺
表制造商
improve production processing by manufacture
长期稳定的热量表
流量 4秒; 温度:4秒/60秒
measuring cycle:flow 4s;temperature 4s/60s
当流量快速增加(≥ 30% ),温度测量与流量测量同步4秒
当最近的2分钟内温度变化低于1K时,恢复60秒周期测量温度。
A rapid increase of the flow ( ≥ 30% ), T230 changes the temperature measuring cycle to the appropriate flow ratemeasuring cycle (4 sec.). temperature difference changes less than 1K resp. latest after 2 min, switched to the longer measuring cycle.
表的规格减少,便于维修、更换和降低库存 few meter type will be helpful for maintain and reduce the storage
在小流量下,可以准确计量,实现高精度 large measurement rate get smaller flow in higher accuracy
精度 accuracy
常用流量及测量范围 permanent flow-rate ( qp) & measurement range
压损 Pressure loss
安装位置 Installation Place
长期稳定性 Long term use (long live meter)
高精度的热量表
耐久性测试认证长寿命 Durability test to certificate long term use
欧洲权威机构PTB组织发布新的耐久性测试方法 PTB issued the new Durability test
超声波表更需要测试不同温度下的流量变化,以及温度 变化对超声波表的影响 Ultrasonic meter should test the flow in different temperature and the inference of temperature change
High Accuracy of Heat Meter
热量表精度:流量测量精度,温度测量精度及计算器精度 Heat Meter accuracy:flow accuracy & temperature accuracy
整体式热量表是流量传感器和温度探头组后做整体调校的,组合精 度更高,计量热量更准确。 Complete HM got higher accuracy due to flow sensor and temperature sensor calibrated after integrated.
常用流量相同时,量程比大则最小流量更低 in same qp, large rate will get smaller qi
宽量程比的热量表能带来的好处
Benefit of Wide Measurement range
宽的量程比可以减少表的规格 wide measurement rate reduce the meter type
选用压损小的热表可降低变径带来的压损影响。 Choose lower pressure loss HM, reduce the bed influence of necking。
一款超声波热量表典型的误差曲线
L+G T230 Heat Meter Typical Accuracy
说明:
T230 典型测量误差曲线 EN 1434 标准等级 2
Intelligent temperature-measuring cycle
智能测量周期:温度测量周期总是能按照当前的流量情况 自动调整,能精确记录温度变化,计量热量更加精确。 temperature measuring cycle will automatically adjust by flow. Get higher accuracy heat.
为什么需要考虑热量表的测量范围?
Why need to concern HM measurement range
在中国,很多情况都是大口径,运行在小流量 in China, most of time, running in smaller flow
小流量的准确计量非常重要 smaller flow in high accuracy is very important
Why need to choose HM according to qp ?
热表将工作在常用流量附近,精度最好,运行最稳定。 HM will work around qp. It will be good accuracy.
降低投资成本。按常用流量选择热表,口径通常较小。 Reduce the investment costs due to smaller size.
e.g.
按照0.5m3/h流量,可供热100m2计算 100m2的住宅,通常管路系统设计为:DN20或DN25 DN20 qp =1.5m3/h 或 2.5m3/h DN25 qp =3.5m3/h 或 6.0m3/h 如果选择DN25口径的热表:0.5m3/h只是常用流量的1/7 常年工作在小流量附近,计量误差大 建议选择:DN20 1.5m3/h 的热表
更小起动流量,防止跑冒滴漏和不正当用热 smaller start flow could reduce leak & improper use heat
高过载能力适应增容需要 higher overload could meet the further increased capacity
选型举例:
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