Thermax


Vapour Absorption Chillers

Product Range




Hot Water



LOW TEMPERATURE 75-120°C

Capacity 35 - 4850 kW

COP 0.7 - 0.8

MEDIUM TEMPERATURE 100-150°C

Capacity 350 - 7650 kW

COP 0.7 - 0.75

Steam Pa:  0.6 to 3.5 Kg/cm² (g)


HIGH TEMPERATURE 175-180°C

Capacity 178- 8800 kW

COP 1.4 - 1.45

Steam

 

SINGLE EFFECT

Capacity 350 - 7650 kW

0-3.5 bar. g steam

COP 0.7 - 0.8

 

DOUBLEEFFECT

Capacity 350 - 8850 kW

3-10.0 bar. g

COP 1.03 - 1.43

Direct Fired

 

HEAT SOURCE:

Natural Gas

Propane

LPG

Biogas

Capacity 175-5450 kW

COP 1.4 - 1.45

Exhaust Gas




HEAT SOURCE:

Exhaust Gas

TEMPS 275-600°C

Capacity 175-8800 kW

COP 1.4 - 1.45

Multi-Energy Chillers

HEAT SOURCE:

High Grade steam

Exhaust gas

Low grade steam

Low temp hot water

Supplementary gas or oil firing

Capacity 175-12300 kW

Triple Effect Chiller

HEAT SOURCE:

Natural gas

Exhaust gas

LPG, Biogas

Capacity 350-3500 kW

COP 1.8

Chiller Heater


 

 

HEAT SOURCE:

Steam, hot water

Fuel firing

Thermic Fluid

Capacity 250-8800 kW

Simultaneous Heat Cool

Heat Pump


 

 

HEAT SOURCE:

Steam

Natural gas

Hot water

Exhaust gas

Capacity 250-40000 kW

COP 1.65 - 1.75


 

Hot Water Driven Vapour Chillers

 

Thermax has the complete range of hot water chillers, specially designed for low temperature, medium temperature and high temperature hot water.

LOW TEMPERATURE HOT WATER


Low temperature hot water chillers are further classified as Low Capacity (LT Series) and High Capacity (5G Series)


COGENIE (LT SERIES)


Cogenie is a simple and compact small capacity single effect hot water chiller. It is widely used for combined heat power and cooling (CHPC) based air-conditioning application is USA and Europe.


Operating Range


  • Capacities: 35 to 700 kW
  • Chilled water temperature: Up to 3.5ºC
  • Hot Water Temperature: From 75ºC to 120ºC
  • COP: 0.65–0.72



MEDIUM TEMPERATURE HOT WATER (HS SERIES)


Medium temperature hot water machine is one of the oldest and most established absorption machines, driven by low grade energy and consuming minimum power. It follows the single effect technology, where the gain in concentration of the absorbent is achieved using only one generator.


Operating Range


  • Capacities: 350 to 7650 kW
  • Chilled water temperature: Up to 3.5ºC
  • Hot Water Temperature: From 120ºC to 150ºC
  • COP: 0.7–0.75


HIGH TEMPERATURE HOT WATER (2G SERIES)


High temperature hot water machines are of the double effect type, where, the gain in concentration is achieved in two steps. The primary generator (referred as High Temperature Generator or HTG) produces vapour, whose latent heat is transferred to lithium bromide in secondary generator (referred as Low Temperature Generator or LTG).


Thermax double effect absorption chillers are designed based on its proven Advanced Series Flow technology. This ensures that the highest concentration and highest temperature of Lithium Bromide solution doesn't occur simultaneously. Due to this the rate of corrosion is negligible compared to the para flow or reverse flow technologies.


Operating Range


  • Capacities: 175 to 8800 kW
  • Chilled water temperature: Up to 1ºC and -2ºC with brine
  • Hot Water Temperature: From 150ºC to 180ºC
  • COP: 1.4 – 1.45

G SERIES

 

5G Series comes with two stage evaporation & condensation technology (also known as Twin design). This ensures the lowest specific heat input as compared to other contemporary VAMs, making them the most efficient VAM in its category. This results in lowest operating cost throughout the life cycle of the VAM and lowest water consumption in cooling tower thus saving precious water.

 

Operating Range

 

  • Capacities: From 200 to 1380USRT (700 to 4850kW)
  • Chilled water temperature: Up to 0ºC (34ºF)
  • Hot Water Temperature: From 75C  to 120C
  • COP: 0.65–0.72

 

 

HEAT SOURCE

 

  • Hot water from solar collectors
  • Process condensate heat recovery
  • Engine jacket water
  • Heat recovery from flue gases

 

Hot water fired machines are used for process cooling, industrial and comfort air-conditioning. A popular application of hot water fired machines is Charge Air Cooling of DGs & Gas Turbines. These machines typically find application in cases where the hot water source is already present, as part of an industrial or commercial process.

 

Hot water fired chillers are generally used in industries like: Chemicals, Pharmaceuticals, Paper, Textiles, Captive Power Plants, Steel, Hotels & Hospitals, Restaurants, Software Parks, Offices, Educational Institutions, Museums, etc.


 

Steam Fire Chillers

Thermax offers a range of steam driven Vapour Absorption Machines driven by saturated steam pressure at 0.1 kg/cm2 to 26 kg/cm2. Steam driven VAMs are categorised as Single effect, Double effect and Triple effect depending on the heat source temperature. The source of heat for steam driven VAMs can be:


•    Steam from boiler
•    Steam from processes
•    Steam from cogeneration plants
•    Steam from turbines


Many industries like Food & Beverages, Paper & Pulp, Pharma, Steel, Dairy, Refinery & Petrochemical, Fertilizers, Textiles, commercial and many more have benefitted from steam driven VAMs.

 

SINGLE EFFECT STEAM FIRED CHILLER (SS SERIES)

 

Single effect steam driven machine is one of the oldest and most established absorption machines, driven by low grade energy and consuming minimum power. In single effect technology, the gain in concentration of the absorbent is achieved using only one generator.

 

Operating Range

 

  • Capacities: 350 to 7650 kW
  • Chilled water temperature: Up to 1ºC and -2ºC with brine
  • Steam pressure: From 0 to 3.5 bar g
  • COP: 0.7 – 0.75
  • Heat source: Steam from boiler, Steam from processes, Steam from cogeneration plants, Steam from turbines

DOUBLE EFFECT STEAM FIRED CHILLER (2B SERIES)

 

Double effect steam driven absorption machines are one of the most efficient cooling solutions for industrial applications. In the double effect machines, the gain in concentration is achieved in two steps. The primary generator (referred as High Temperature Generator or HTG) produces vapour, whose latent heat is transferred to lithium bromide in secondary generator (referred as Low Temperature Generator or LTG).

 

Thermax double effect absorption chillers are designed based on its proven Advanced Series Flow technology. This ensures that the highest concentration and highest temperature of Lithium Bromide solution doesn't occur simultaneously. Due to this the rate of corrosion is negligible compared to the para flow or reverse flow technologies.

 

Operating Range

 

  • Capacities: From 50 TR to 3500 TR Cooling capacity (175 – 12300kW)
  • Chilled water temperature: Up to 1ºC and -2ºC with brine
  • Steam pressure: From 3.0 to 10.0 bar g
  • COP: 1.45– 1.5
  • Heat source: Steam
  • ΔT 30° C

 

 


 

Direct Fired Chillers

 

Direct fuel fired double effect machines have a furnace as an integral part of the high temperature generator, where a variety of liquid or gaseous fuels can be fired to drive the absorption machine. Range of fuels: Natural gas, Liquid Petroleum Gas (LPG), Compressed Natural Gas (CNG), Propane, Kerosene, Biogas & High Speed Diesel (HSD)

 

Operating Range

 

  • Chilled water temperature: Up to 1ºC (34ºF) and -2ºC (28.5ºF) for brine
  • Capacities: From 50 to 1550 TR (175-5450kW)
  • Heat source: Natural gas, Liquid Petroleum Gas (LPG), Compressed Natural Gas (CNG), Propane, Kerosene, Biogas & High Speed Diesel (HSD)
  • COP: 1.45-1.5

 

Exhaust Fired Chillers (2D SERIES)

 

Thermax exhaust fired absorption machines directly utilise waste heat from the Gas/diesel engine or turbine exhaust gases, micro turbine or fuel cell which helps in making air-conditioning almost free of cost. It also reduces the initial capital cost of the system, by downsizing the engine size; as additional power units required for electrical chillers is eliminated. Heat recovery from multiple engines can also be done by single machine having separate dedicated tube banks to a particular engine thereby avoiding mixing of flue gases and back pressure.

 

Operating Range

 

 

  • Chilled water temperature: Up to 1ºC (34ºF) and -2ºC (28.5ºF) for brine
  • Capacities: From 50 to 2500 TR (175 to 8800kW)
  • Exhaust gas temperature: From 275 to 600ºC (525 to 1110ºF)
  • COP: 1.45 – 1.5
  • 50 – 2500 TR Cooling Capacity
  • Waste heat recovery from exhaust of gas engine, diesel engine, gas turbine
  • 10 – 25 bar steam pressure

 

Multi Energy Driven Chiller (2D SERIES)

 

Thermax multi-energy machines are designed as per Single-Double effect technology, enabling maximum heat recovery from both the heat sources. High- grade and low-grade heat is used in Double effect cycle and Single effect cycle respectively. Most commonly used Multi energy machine is EJ Series which runs on engine exhaust and engine jacket water.

Operating Range


  • Chilled water temperature: Up to 1ºC (34ºF) and -2ºC (28.5ºF) for brine
  • Capacities: From 100 TR to 3500 TR Cooling Capacity (175 to 12300kW)
  • Heat source: Exhaust gas, steam, hot water & liquid/gas fuels
  • High Grade

             Steam (4 to 10Kg/cm²)
             Exhaust gas(350 to 600ºC)
             Hot water(150 to 180ºC)


  • Low grade

             Steam( 0 to 3.5Kg/cm²)
             Hot water(80 to 95ºC)


  • Supplementary backup: Direct Oil/Gas Firing
  • COP: 1.1 – 1.2
  • Upto – 5 °C chilled water temp.
  • ΔT 30° C
  • Multiple Heat Sources

 

Triple Effect Chiller

 

Thermax triple effect absorption chillers are designed based on its proven advanced series flow technology. This ensures that the highest concentration and highest temperature of Lithium Bromide solution doesn’t occur simultaneously. Due to this the rate of corrosion is negligible compared to the para flow or reverse flow technologies. Coupled with an accurate online concentration measurement, the Thermax Triple effect absorption chillers are extremely user friendly and significantly reduces user intervention and down time.

 

The variable frequency drives on solution pumps helps to improve the COP during part loads and also offers a stable operation. It also increases the life of the solution pump. Ferritic stainless steel tubes in generators of the triple effect machine have thermal expansion coefficient similar to carbon steel and thus helps to avoid the stress corrosion cracking. The plate type solution heat exchangers increase the COP by offering maximum internal heat recovery. The stainless steel plates of these solution heat exchangers ensure long life and reliability.

Operating Range

 

  • Cooling capacity: 100 – 1000 TR (350 – 3500 kW)
  • Chilled water:

        Lowest outlet temperature: 5°C

        Chilled water ΔT – 30°C max

 

  • Cooling water:

        Design inlet temperature: 25°C – 32°C

        Minimum inlet temperature: 10°C

 

  • Driving heat source: Steam (Pressure: 10 – 25 bar.g, Dry saturated) or Hot Water (Inlet temperature: 190°C – 225°C)

 

Product Features


  • Highest possible COP
  • Online concentration measurement
  • Stainless steel tubes for generator
  • Stainless steel plate type solution heat exchangers
  • Advance series flow technology
  • VFD for solution pump
  • PLC based control panel
  • BMS connectivity
  • Colour Touch screen operator interface


The operation of the absorption chiller is controlled by stand-alone PLC based control panel. The touch screen HMI provided on the control panel through which the operator can set the necessary set points and can see all the operating parameters, status, alarms, trip logs. The chiller is also equipped with necessary level controls, temperature sensors, flow safety devices etc. to control and safeguard the chiller. For viewing the operating parameters of the chiller from a remote location, MODBUS RTU or Ethernet connectivity is available.


 

Chiller Heater

 

In Thermax’s High Efficiency Chiller-Heater 40% of Heat required for generating hot water is recovered from low temperature chilled water. Remaining 60% is recovered from external heat source. Thereby, 40% reduction in direct external heat source can be achieved for heating hot water as compared to conventional hot water generator. Additionally refrigeration is also generated simultaneously.

 

Operating Range

 

  • Heating capacity: 100 to 9250 kW
  • Cooling capacity: 50 to 3500 TR
  • Hot water temperature: Up to 90ºC (194ºF)
  • Chilling water temperature: Up to 1ºC (34ºF) and -2ºC (28.5ºF) for brine
  • Heat Source: Steam, Hot Water, Exhaust Gas, Fuel firing
  • Simultaneous Cooling and Heating

 

Heat Pump-TYPE I

 

Heat pumps drive heat from a lower temperature to medium temperature, using high grade energy. Thermax heat pumps utilise steam, hot water, exhaust, fuel, geothermal energy or any combination of these heat sources, to pump heat. Heat pumps save approximately 35% of heat energy.


Operating Range


  • Capacities: 0.25 – 40 MW
  • Hot water temperature: Up to 90ºC (194ºF)
  • High Grade Heat Source: Exhaust gas, steam, hot water & liquid/gas fuels (individually or in combination)
  • COP: 1.65 – 1.75
  • 4 – 10 bar.g Steam (Pressure)