Who is Multistack?
The Creator and Leader of Modular Chiller
模块化冷水机组的发明者与领导者
MODULAR CHILLER -------- Since 1985
Multistack International Limited
Multistack 生产基地:
How much did
oil degrade the performance of the chiller
16
% 14
loss Efficiency
12 10
8 6 4
2
0
012345678
Oil content in refrigerant %
How much did
oil degrade the performance of the chiller
oil degrade the performance of the chiller
25 22.9
20
16.9
17.9
15 12.7
10 7.1
5 4.9
16.7 17.8 9
3.5
0
1
2
3
4
5
6
7
8
9 10
Percentage of oil in refrigerant in older chillers ASHRAE Research Project
Shaft's Position Controls
? Sensed and repositioned 6,000,000 times every minute
? Maximum run-out less than 7x10-3mm ? Software compensate for any out-of-balance
Radial bearings
Radial bearings
Impellers Sensor ring
Motor rotor Motor Sensor ring Axial bearing
Magnetic bearing
Permanent Magnet
Rotor
Electromagnet
Pefugal Compressor with Magnetic Bearing
About TT300…
? 1993年，Multistack 最早开始磁轴承的离心 式制冷压缩机的项目研究
? 1997年，进入样机试验阶段 ? 1999年，Turbocorp 迁往加拿大 ，成为一
Rotor
Electromagnet
Axial bearing
Radial bearing
Magnetic Bearing
Permanent magnets Primary work Electro-magnets Secondary trim system Bearing sensor Feed back rotor orbit
MT Series Chiller
What is New?
? 磁悬浮轴承离心式压缩机 ? 不需要润滑油 ? R134a冷媒 ? 高效 COP=5.5 IPLV=8.6(0.41kW/ton) ? 安静 70dB(A) (at 3m) ? 软启动，变频驱动 ? 与压缩机一体化的数字控制系统 ? 可变水流量运行
吸气导向叶 轮
Conventional Compressor
Roller bearings or hydrodynamic bearings
润滑的烦恼
? 摩擦损失 ? 油膜覆盖换热器传热表面 ? 润滑油循环装置和控制
-- 循环油泵 -- 油冷却器和油加热器 -- 油分离器
How much did
MT Series
Water cooled Modular Chiller
MT 系列 磁悬浮 离心式 模块化
冷水机组
MT Series water cooled chiller
MTW350 (制冷量 358kW) MTW500 (制冷量 511kW)
模块化结构 制冷量90~880TR
MV6电脑控制
Up to 90%
压缩机烧毁的原因近90%缘于润滑的失效
21st Compressor Innovation TT Series Centrifugal Compressor
数字控制式磁轴承系统 完全无润滑油运行
21st Compressor Innovation TT Series Centrifugal Compressor
On-board digital electronics
两极压缩离心式压缩机 无油的磁轴承 变频驱动
一体化数字控制
21st Compressor Innovation
TT SeriesCentrifugal Compress
转速控制器 VSD
磁轴承和轴 承传感器
永磁式同步 电机
轴承控制器 MBC
永磁体转轴 与离心叶轮
个完全独立的公司 ? 2003年，参加Chicago AHR Expo ，获得
Energy-Innovation Award
Frictionless Compressor Technology
Two-stage centrifugal compressor Oil-free Magnetic bearings Variable-speed drive
Multistack Australia -------since 1985 Multistack China -------since 1988 Multistack U.S.-------since 1989
Multistack 产品:
水冷模块冷热水机组 风冷模块冷热水机组 一次泵变水量模块冷热水机组 自由变频模块冷热水机组 磁悬浮离心式模块机组
condition in the levitated assembly
For Conventional Centrifugal Compressor
机械轴承
磁悬浮轴承
Magnetic Bearing System
Two radial & one axial bearings Sensor ring
Magnetic bearing system keeps the shaft properly centered and positioned at all times.