The Weatherite Group

Weatherite Manufacturing Ltd is part of

the Weatherite Group, one of the UK’s leading

HVAC and Building Services organisations.

l Weatherite Manufacturing Ltd

l Weatherite Building Services Ltd

l Weatherite Service and Maintenance Ltd

l Weatherite Electrical Ltd

l Weatherite Shopfronts and Shutters Ltd

Weatherite Manufacturing LimitedWeatherite House, Credenda Road,West Bromwich, West MidlandsB70 7JE EnglandT 0121 665 2266F 0121 665 2277E wmlsales@weatheriteroup.com

www.weatheritegroup.com

for energy efficient low carbon, sustainable solutions

ADsorption chiller technology

As part of the Kyoto protocol, the UK Government

is committed to substantially reduce the nation’s

CO2 emissions over the next ten years. Many of

the Uk’s leading businesses have also outlined their

commitment to cutting their energy consumption and

carbon footprint. The world is following suit, as

globally, organisations seek environmentally friendly

solutions to their energy usage.

ADsorption chiller technology can significantly

contribute towards a greener, energy efficient

environment.

Weatherite

Weatherite is leading the way in delivering energy

saving, environmentally friendly solutions using the

latest ADsorption chiller technology. As well as design

expertise, Weatherite has the ability to manufacture

large-scale trigeneration plantrooms within a clean

and efficient manufacturing facility before they are

delivered and installed on site. This approach offers

excellent cost saving benefits and ensures on site

disruption is kept to an absolute minimum.

Proven expertise from a leading manufacturer

ADsorption chiller technology the energy efficient solution

The significant benefits of ADsorption chillers have

been realised throughout the world in recent years with

successful applications in the USA, Japan and Europe.

The ADsorption chiller offers huge energy and carbon

saving potential, not only within a trigeneration application

(i.e. combined cooling, heating and power) but also in any

application where an abundance of waste heat is produced

and a requirement for cooling or refrigeration exists.

ADsorption chillers are also ideal for solar thermal applications

and can also be used alongside district heating systems.

Designed to operate 24/7, ADsorption chillers are

programmed by controller sensors, ensuring they

operate at high efficiency – even with variable loads. The

ADsorption chiller produces chilled water in only seven

minutes from start-up, which can then be used for cooling,

refrigeration or heat rejection.

The ADsorption chiller is an exciting addition to

Weatherite’s range of energy efficient air conditioning

equipment. As the only company in Europe with sole

manufacturing rights, Weatherite has the expertise,

skill and resource to provide high energy efficient,

environmentally friendly solutions to suit our clients’ needs.

Serious concerns for the environment have focused

everyone’s attention on the future of our planet. Whether

you’re a major retailer, manufacturer, hospital, local authority or

commercial organisation, the race is on to reduce energy costs,

cut carbon emissions and help protect the environment.

Almost all modern facilities use energy to generate the power

required for lighting, IT, cooling, refrigeration and other building

services. The resultant fuel costs and levels of CO2 produced can

be staggering - not to mention the impact on global warming.

Efficient energy conservation can be achieved by using available

waste heat from an ADsorption chiller for various applications

as part of a trigeneration system. Most trigeneration systems

currently use absorption chillers but in these modern challenging

times there is a far better alternative: the ADsorption chiller.

ADsorption technology is the way forward in waste heat

utilisation. It offers a highly reliable, efficient solution that

takes waste heat from the cogeneration process to operate the

chiller. Not only does an ADsorption chiller provide continuous

operation with remarkable efficiency, it is also safer for the

environment and offers much lower life cycle costs.

Introducing ADsorption chiller technology

Maximised output with minimised impact and lower costs

ADsorption chiller technology the energy efficient solution

The significant benefits of ADsorption chillers have

been realised throughout the world in recent years with

successful applications in the USA, Japan and Europe.

The ADsorption chiller offers huge energy and carbon

saving potential, not only within a trigeneration application

(i.e. combined cooling, heating and power) but also in any

application where an abundance of waste heat is produced

and a requirement for cooling or refrigeration exists.

ADsorption chillers are also ideal for solar thermal applications

and can also be used alongside district heating systems.

Designed to operate 24/7, ADsorption chillers are

programmed by controller sensors, ensuring they

operate at high efficiency – even with variable loads. The

ADsorption chiller produces chilled water in only seven

minutes from start-up, which can then be used for cooling,

refrigeration or heat rejection.

The ADsorption chiller is an exciting addition to

Weatherite’s range of energy efficient air conditioning

equipment. As the only company in Europe with sole

manufacturing rights, Weatherite has the expertise,

skill and resource to provide high energy efficient,

environmentally friendly solutions to suit our clients’ needs.

Serious concerns for the environment have focused

everyone’s attention on the future of our planet. Whether

you’re a major retailer, manufacturer, hospital, local authority or

commercial organisation, the race is on to reduce energy costs,

cut carbon emissions and help protect the environment.

Almost all modern facilities use energy to generate the power

required for lighting, IT, cooling, refrigeration and other building

services. The resultant fuel costs and levels of CO2 produced can

be staggering - not to mention the impact on global warming.

Efficient energy conservation can be achieved by using available

waste heat from an ADsorption chiller for various applications

as part of a trigeneration system. Most trigeneration systems

currently use absorption chillers but in these modern challenging

times there is a far better alternative: the ADsorption chiller.

ADsorption technology is the way forward in waste heat

utilisation. It offers a highly reliable, efficient solution that

takes waste heat from the cogeneration process to operate the

chiller. Not only does an ADsorption chiller provide continuous

operation with remarkable efficiency, it is also safer for the

environment and offers much lower life cycle costs.

Introducing ADsorption chiller technology

Maximised output with minimised impact and lower costs

An ADsorption chiller is a highly reliable,

efficient solution that takes waste heat to

produce chilled water, which in turn can be

used for cooling and linked into refrigeration

applications. ADsorption technology produces

chilled water down to as low as 3º C as required,

making it ideal for any application with a

high cooling demand such as process cooling,

supermarkets and data centres. The ADsorption

chiller is also ideal for solar thermal cooling

applications.

The ADsorption chiller can operate efficiently with

a lower heat source, thereby delivering cooling

solutions to a wider range of applications. It also

has the ability to operate at low temperatures

(down to 3ºC) and within a wide range of

temperatures from 50ºC to 90ºC. Even with a ‘flat

performance curve’, the chiller still provides 90%

capacity at 70ºC hot water input.

Minimal maintenance

Because the ADsorption chiller operates on such a simple

process, the downtime is minimal and maintenance is kept

to an absolute minimum too. Simplicity of operation makes

the chiller extremely reliable and safe, with low operating costs.

There are no hazardous substances such as lithium bromide

or ammonia within the chiller. Instead, it uses a natural

substance, silica gel plus water as a refrigerant, making the

whole process highly environmentally friendly.

The chiller can be used in applications where there is a

waste heat source, for example heat recovery off a process

or via a co-generation process. The highly efficient chiller

offers exceptional cooling capabilities and uses water as its

cooling agent, so it’s highly environmentally friendly. The

water evaporates in a vacuum and thereby extracts heat

from its surroundings (evaporating-energy). Through this

process, cooling takes place.

There are no high voltage motors or large compressors and

no external temperature controls are required for capacity

control or to protect the chiller.

Non-hazardousWith water as refrigerant, any pipework or valve work can

be undertaken easily as there are no hazardous substances

such as lithium bromide or ammonia.

The chiller has a life expectancy of 20-30 years and end of

life disposal is simple as the chiller is almost fully recyclable

and has no hazardous refrigerants to dispose of.

Waste heat recovery

BackgroundTesco has made the reduction of its carbon footprint

a major business driver and plans to halve the carbon

footprint of its existing operations by 2020. As part of this

commitment, Tesco identified a number of stores where a

trigeneration plantroom, incorporating ADsorption chiller

technology, could be trialed. The Swindon outlet was

selected as one of the trial applications.

Tesco chose Weatherite as part of the delivery team

because of its expertise in delivering energy efficient

engineering solutions and its understanding of the

ADsorption chiller technology.

The objective was to design, manufacture and deliver a fully

packaged integrated solution built off-site, to minimise on-site

disruption and costs, which would deliver substantial energy

savings and also reduce harmful, damaging carbon emissions.

This was achieved by maximising the use of the available waste

heat generated by the integral (CHP) power engines and using

this waste heat to drive the ADsorption chiller.

Through the adsorption process the ADsorption chiller provides

the store’s chilled water for the air conditioning system and, as

necessary, linking into the store’s refrigeration system.

The trigeneration plantroom, incorporating the ADsorption

chiller, was designed to provide outputs of 600kw electricity,

900kw thermal heating load at 90ºC flow / 85ºC return and

529kw thermal cooling load of chilled water at 6ºC flow /

11ºC return.

The localised generation of electricity via the power engines

within the plantroom now provides the store with up to 100%

of its electricity demand and, by incorporating the ADsorption

chiller within the design, the stores CO2 emission’s are reduced

in excess of 20%.

The Solution

The way forward in waste heat utilisation

What is an ADsorption chiller? Case Study Swindon

An ADsorption chiller is a highly reliable,

efficient solution that takes waste heat to

produce chilled water, which in turn can be

used for cooling and linked into refrigeration

applications. ADsorption technology produces

chilled water down to as low as 3º C as required,

making it ideal for any application with a

high cooling demand such as process cooling,

supermarkets and data centres. The ADsorption

chiller is also ideal for solar thermal cooling

applications.

The ADsorption chiller can operate efficiently with

a lower heat source, thereby delivering cooling

solutions to a wider range of applications. It also

has the ability to operate at low temperatures

(down to 3ºC) and within a wide range of

temperatures from 50ºC to 90ºC. Even with a ‘flat

performance curve’, the chiller still provides 90%

capacity at 70ºC hot water input.

Minimal maintenance

Because the ADsorption chiller operates on such a simple

process, the downtime is minimal and maintenance is kept

to an absolute minimum too. Simplicity of operation makes

the chiller extremely reliable and safe, with low operating costs.

There are no hazardous substances such as lithium bromide

or ammonia within the chiller. Instead, it uses a natural

substance, silica gel plus water as a refrigerant, making the

whole process highly environmentally friendly.

The chiller can be used in applications where there is a

waste heat source, for example heat recovery off a process

or via a co-generation process. The highly efficient chiller

offers exceptional cooling capabilities and uses water as its

cooling agent, so it’s highly environmentally friendly. The

water evaporates in a vacuum and thereby extracts heat

from its surroundings (evaporating-energy). Through this

process, cooling takes place.

There are no high voltage motors or large compressors and

no external temperature controls are required for capacity

control or to protect the chiller.

Non-hazardousWith water as refrigerant, any pipework or valve work can

be undertaken easily as there are no hazardous substances

such as lithium bromide or ammonia.

The chiller has a life expectancy of 20-30 years and end of

life disposal is simple as the chiller is almost fully recyclable

and has no hazardous refrigerants to dispose of.

Waste heat recovery

BackgroundTesco has made the reduction of its carbon footprint

a major business driver and plans to halve the carbon

footprint of its existing operations by 2020. As part of this

commitment, Tesco identified a number of stores where a

trigeneration plantroom, incorporating ADsorption chiller

technology, could be trialed. The Swindon outlet was

selected as one of the trial applications.

Tesco chose Weatherite as part of the delivery team

because of its expertise in delivering energy efficient

engineering solutions and its understanding of the

ADsorption chiller technology.

The objective was to design, manufacture and deliver a fully

packaged integrated solution built off-site, to minimise on-site

disruption and costs, which would deliver substantial energy

savings and also reduce harmful, damaging carbon emissions.

This was achieved by maximising the use of the available waste

heat generated by the integral (CHP) power engines and using

this waste heat to drive the ADsorption chiller.

Through the adsorption process the ADsorption chiller provides

the store’s chilled water for the air conditioning system and, as

necessary, linking into the store’s refrigeration system.

The trigeneration plantroom, incorporating the ADsorption

chiller, was designed to provide outputs of 600kw electricity,

900kw thermal heating load at 90ºC flow / 85ºC return and

529kw thermal cooling load of chilled water at 6ºC flow /

11ºC return.

The localised generation of electricity via the power engines

within the plantroom now provides the store with up to 100%

of its electricity demand and, by incorporating the ADsorption

chiller within the design, the stores CO2 emission’s are reduced

in excess of 20%.

The Solution

The way forward in waste heat utilisation

What is an ADsorption chiller? Case Study Swindon

In comparison to conventional air conditioning and refrigeration, ADsorption chiller

technology can deliver a substantial reduction in both primary energy consumption

and carbon emissions.

The ADsoption chiller can operate efficiently with a lower heat source thereby

delivering cooling solutions to a wider range of applications.

Because the ADsorption chiller uses such a simple process, the downtime is minimal

and maintenance is also kept to an absolute minimum.

The are no hazardous substances within the chiller (i.e. lithium bromide or ammonia);

it uses silica gel (a natural substance) and water as a refrigerant. Therefore, the whole

process is highly environmentally friendly - right through to end of life disposal.

The operating principleThe ADsorption chiller works on a proven and simple

design principle.

It consists of four chambers:

The evaporator located at the bottom of the machine

The condenser – at the top of the machine

Two central ADsorption chambers

The two central ADsorption chambers contain heat

exchangers packed with silica, with a valve between them

to allow vapour pressure equalization. Between each

central ADsorption chamber and the “evaporator” and

“condenser” chambers, valves allow the transfer of vapour

when there is sufficient pressure differential.

Simple, safe, low-cost operation and maintenance

The water flow is directed to the specific

areas of the chiller by control valves

which are automatically sequenced by

the chiller’s on board controller.

The charge of refrigerant (water) within

the chiller is circulated around the

chambers by means of vapour pressure

differential and a gravity drain from the

condenser section where it has been

condensed from a vapour to a liquid.

The drained water is collected at the

bottom of the machine and pumped into

a distribution header which sprays the

fluid over the evaporator heat exchanger.

This section is at lower pressure and the

water fluid evaporates when in contact

with the heat exchanger and in doing so

absorbs heat from the evaporator tube

bundle, providing a chilling effect to the

water within.

One complete cycle takes around seven

minutes and capacity control is achieved

by shortening the cycle time.

Waste hot water from the cogeneration process

alternates between the two central ADsorption

heat exchangers and drives out the moisture

previously adsorbed by the silica.

The evaporator is fed by a constant flow of

chilled water return and supply.

The cooling water supplies the condenser

section and alternates between the two

ADsorption heat exchangers. The cooling water

is pumped to a remote heat rejection system.

(Cooling tower, adiabatic cooler, low grade heat

reclaim, etc).

There are three water sources to the chiller:

ADsorption Chiller Schematic

1

2

3

Evaporator

Hot water in

Hot water out

Cooling water in

Cooling water out

Chilled water out

Chilled water in

Condenser

Cooling water out

ADsorption

Heat Exchanger

ADsorption

Heat Exchanger

In comparison to conventional air conditioning and refrigeration, ADsorption chiller

technology can deliver a substantial reduction in both primary energy consumption

and carbon emissions.

The ADsoption chiller can operate efficiently with a lower heat source thereby

delivering cooling solutions to a wider range of applications.

Because the ADsorption chiller uses such a simple process, the downtime is minimal

and maintenance is also kept to an absolute minimum.

The are no hazardous substances within the chiller (i.e. lithium bromide or ammonia);

it uses silica gel (a natural substance) and water as a refrigerant. Therefore, the whole

process is highly environmentally friendly - right through to end of life disposal.

The operating principleThe ADsorption chiller works on a proven and simple

design principle.

It consists of four chambers:

The evaporator located at the bottom of the machine

The condenser – at the top of the machine

Two central ADsorption chambers

The two central ADsorption chambers contain heat

exchangers packed with silica, with a valve between them

to allow vapour pressure equalization. Between each

central ADsorption chamber and the “evaporator” and

“condenser” chambers, valves allow the transfer of vapour

when there is sufficient pressure differential.

Simple, safe, low-cost operation and maintenance

The water flow is directed to the specific

areas of the chiller by control valves

which are automatically sequenced by

the chiller’s on board controller.

The charge of refrigerant (water) within

the chiller is circulated around the

chambers by means of vapour pressure

differential and a gravity drain from the

condenser section where it has been

condensed from a vapour to a liquid.

The drained water is collected at the

bottom of the machine and pumped into

a distribution header which sprays the

fluid over the evaporator heat exchanger.

This section is at lower pressure and the

water fluid evaporates when in contact

with the heat exchanger and in doing so

absorbs heat from the evaporator tube

bundle, providing a chilling effect to the

water within.

One complete cycle takes around seven

minutes and capacity control is achieved

by shortening the cycle time.

Waste hot water from the cogeneration process

alternates between the two central ADsorption

heat exchangers and drives out the moisture

previously adsorbed by the silica.

The evaporator is fed by a constant flow of

chilled water return and supply.

The cooling water supplies the condenser

section and alternates between the two

ADsorption heat exchangers. The cooling water

is pumped to a remote heat rejection system.

(Cooling tower, adiabatic cooler, low grade heat

reclaim, etc).

There are three water sources to the chiller:

ADsorption Chiller Schematic

1

2

3

Evaporator

Hot water in

Hot water out

Cooling water in

Cooling water out

Chilled water out

Chilled water in

Condenser

Cooling water out

ADsorption

Heat Exchanger

ADsorption

Heat Exchanger

The Weatherite Group

Weatherite Manufacturing Ltd is part of

the Weatherite Group, one of the UK’s leading

HVAC and Building Services organisations.

l Weatherite Manufacturing Ltd

l Weatherite Building Services Ltd

l Weatherite Service and Maintenance Ltd

l Weatherite Electrical Ltd

l Weatherite Shopfronts and Shutters Ltd

Weatherite Manufacturing LimitedWeatherite House, Credenda Road,West Bromwich, West MidlandsB70 7JE EnglandT 0121 665 2266F 0121 665 2277E wmlsales@weatheriteroup.com

www.weatheritegroup.com

for energy efficient low carbon, sustainable solutions

ADsorption chiller technology

As part of the Kyoto protocol, the UK Government

is committed to substantially reduce the nation’s

CO2 emissions over the next ten years. Many of

the Uk’s leading businesses have also outlined their

commitment to cutting their energy consumption and

carbon footprint. The world is following suit, as

globally, organisations seek environmentally friendly

solutions to their energy usage.

ADsorption chiller technology can significantly

contribute towards a greener, energy efficient

environment.

Weatherite

Weatherite is leading the way in delivering energy

saving, environmentally friendly solutions using the

latest ADsorption chiller technology. As well as design

expertise, Weatherite has the ability to manufacture

large-scale trigeneration plantrooms within a clean

and efficient manufacturing facility before they are

delivered and installed on site. This approach offers

excellent cost saving benefits and ensures on site

disruption is kept to an absolute minimum.

Proven expertise from a leading manufacturer