High Efficiency Centrifugal Chillers realize world top-level high efficiency and downsizing thanks to the advanced technologies to optimize the design of compressors and heat-exchangers. Several series of product lineup and flexible model selection satisfy huge variety of customers’ demand such as energy saving, space saving, etc. In addition, Hitachi’s unique technologies accumulated through over 80-year history ensure long term stable operation.

High efficiency centrifugal chiller has abundant lineup with 4 series, which satisfies various kinds of customers’ demand.

● HC-F-GFG-S(SC) Series (Super High Efficiency Model)

GFG-S(SC) Series covering the highest efficiency range was developed responding to the energy saving demand increasing year after year.
GFG-S(SC) series contributes maximally to the demands of building owners who obtains high grade energy saving certifications such as LEED,
Green Building Index, etc., as well as the large size industrial customers.

  • [Capacity Range] Low Voltage (380～460V) : 1,055～4,922kW (300～1,400USRT)
  • Middle Voltage (3/3.3kV, 6/6.6kV) : 1,055～8,790kW (300～2,500USRT)
  • High Voltage (10/11kV9 : 3,164～8,790kW (900～2,500USRT)
  • Frequency : 50/60Hz

● HC-F-GXG-S Series (High Efficiency Model)

GXG-S Series is the main product with well-balanced features satisfying both high efficiency and space saving,
and it is used by many commercial and industrial customers since it was introduced to the market.

  • [Capacity Range] Low Voltage (380～460V) : 1,055～4,922kW (300～1,400USRT)
  • Middle Voltage (3/3.3kV, 6/6.6kV) : 1,055～8,790kW (300～2,500USRT)
  • High Voltage (10/11kV : 3,164～8,790kW (900～2,500USRT)
  • Frequency : 50/60Hz

 

  • HC-F-GSG-S Series (Compact Model)

GSG-S Series with excellent compact design and light weight focuses on the demand of space saving.
These models are the most suitable to customers who has a limitation of machine room space, replacement of long-operated chiller units, etc.

[Capacity Range] Low Voltage (380～460V) : 1,055～4,395kW (300～1,250USRT)
Middle Voltage (3/3.3kV, 6/6.6kV) : 1,055～7,032kW (300～2,000USRT)
High Voltage (10/11kV : 2,813～7,032kW (800～2,000USRT)
Frequency : 50/60Hz

● HC-F-SG Series (High Efficiency Model)

SG Series, as well as GXG-S Series, is also a main product line satisfying both demands for energy saving and space saving and used by many commercial and industrial customers.

[Capacity Range] Low Voltage (380～440V) : 703～3,868kW (200～1,100USRT)
Middle Voltage (3/3.3kV, 6/6.6kV) : 703～7,032kW (200～2,000USRT)
Frequency : 50/60Hz

● Twin Module Type (Cooling Capacity: Up to 17,580kW (5,000USRT))

Hitachi high efficiency centrifugal chiller can achieve the cooling capacity up to maximum 17,580kW (5,000USRT) with two-module design, namely connect the two modules in series and operate them as one single unit. Twin module product can improve the efficiency further applying series counter flow water system.

Key Technologies Realizing High Efficiency

2 Stage Centrifugal Chiller Cycle

Compact Design

Significantly compact and light weight design enables space saving and easy replacement. Newly developed economizer realized significant downsizing of chiller unit.

Easy Operation with Touch Panel Type Control Panel

  • Featuring 10.4 inch color touch panel screen
  • Monitor and store various operation data, trend data, failure information, etc.
  • Show handling guide in case of failure
  • Multilingual languages indication (English, Japanese, Simplified/Traditional Chinese, Portuguese, etc.)
  • Download 3-month operation data to USB memory
  • Automatic restart function after instantaneous power failure (Option)
  • Compatible with BMS through MODBUS communication.

High Reliability

KRC unique technologies based on 25-year experience enhance high reliability and long term stable operation

  • Continuous stable operation even with high condenser pressure due to high ambient temperature and/or fouling of tubes, etc.
  • No-surge operation under high cooling water temperature and low cooling load adopting strict criteria specified in JIS conditions.
  • Key-free impeller coupling system
  • Accurate chilled water temperature control within ±0.2 oC
  • Low noise and longer bearing life due to lower rotation speed of 2-stage compression cycle.
  • Continuous oil recovery with automatic refrigerant cleaner
  • Prevention of oil degradation by removing residual water with filter dryer