World Changing Refrigeration
www.dearman.co.uk
Powered by the revolutionary Dearman engine, and fuelled by liquid nitrogen for sustainable
clean cool energy
Dearman’s zero-emission system is really exciting, to be running a liquid air engine quite literally means our cooling is running on thin air!”
Paul Crewe, Head of Sustainability for Sainsbury’s
www.dearman.co.uk
How society delivers clean and sustainable cold is a major issue, given the global challenges of food scarcity, changing demographics and growing energy demand.
The Dearman transport refrigeration units (TRUs) are the world’s fi rst to overcome the big four environmental downsides of diesel TRUs - noise, waste heat, greenhouse gases, exhaust emissions of nitrogen oxides (NOx) and particulate matter (PM) - and setting new industry performance standards for temperature control and emissions with a cost-effective clean alternative.
Dearman focused on your future
www.dearman.co.uk
Engineered without compromise
Powered by the revolutionary Dearman engine, and fuelled by liquid nitrogen, the Dearman transport refrigeration system is:
• Low Carbon
• Zero Emission
• Quiet
• Cost Competitive
It delivers unparalleled performance in cooling power, speed and accuracy - all fully independent of the primary powertrain. The unit itself comes packed in an industry standard undermount skid or nosemount for maximum fl eet fl exibility. Refuelling is driver-operated and fast, simple and safe. A single refi ll is able to last up to three days, depending on duty cycle.
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The benefi ts
Lifecycle CO2 savingsup to 30 metric tonnes per vehicle per year
Zero emission locally
Quiet; potential to expand operating hours
Superior performance for pull-down; potential to enable operational benefi ts
Easy and safe to operate
Cost comparable to diesel on a TCO basisin the EU
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Superior performance
Environmentally friendly• Zero-emission, reducing total vehicle NOx by up to 85%
and engine PM by 96% (based on Euro VI powertrain)
• Delivers C02 savings of up to 30 tonnes per vehicle per year (depending on carbon intensity of grid).
• Quiet operation uninsulated <65dB(A)potential to meet 60dB(A) PIEK with insulation pack where required.
CARBON FOOTPRINT NOx EMISSIONS PM EMISSIONS
Diesel Refrigeration
LiN supplied through open market
ZERO
PM100
ZERO
PM
80
60
40
20
0
ZERO
NO
x
Incu
mbe
nt D
iese
l TR
U te
chno
logy
UP
TO 9
6% le
ss C
O2
Higher Cooling PowerDearman’s higher cooling power reduces pull-down time for the truck and provides rapid temperature recovery after door openings. In an 18T rigid, it can cool a vehicle from +15℃ to -21℃ in 30 minutes.
Higher cooling power and faster pull-down times can:
• Increase vehicle utilisation and reduce down time.
• Provide tight temperature control after door openings, allowing more fl exibility with route scheduling, leading to possible cost savings.
50
10
5
0
-5
-10
-15
-20
-2510 15 20 25
Pulldown time in minutes
CO
MPA
RTM
ENT
TEM
PER
ATU
RE
(℃)
+15℃
-21℃
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There is nothing new about liquid nitrogen as a working fl uid for transport refrigeration. First generation systems emerged 20 years ago which sprayed LiN directly around the trailer payload. These offered good cooling control, but posed health and safety risks.
Second generation nitrogen systems (also called evaporation LiN systems) are already offered by global industrial gas companies. These generate cold solely by letting the liquid
What’s the big difference between a Dearman and other LiN-fuelled TRUs?
CONVENTIONAL AUXILIARY DIESEL TRU
EVAPORATION LiN SYSTEM
Independent of primary engine
Affordable
- But -
Emissions (CO2, NOx & PM)
Refrigeration plant isineffi cient and noisy
Zero tailpipe emissions
Quiet
Good cooling control
- But -
Economics are challenging as high LiN consumption
(evaporation only)
Not independent because the main engine has to power
electric loads
DEARMAN LiN ENGINE
Zero tailpipe emissions
Independent of primary engine
Quiet
Good functionality/speed of pull down
Cost-competitive because system exploits both
evaporation and expansion, producing cold and power from
a single tank of cryogen
Best of both
nitrogen evaporate. They are quiet and zero-emission, but provide less than half the cooling of a Dearman. In addition, they have to rely on an external power source like the truck’s main engine for electrical power to drive its fans since the evaporation does not generate electricity.
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How does the Dearman Clean Cold and Power Transport Refrigeration Unit work?
Dearman engine
Cool air Cool air In cabin controls
Liquid nitrogen
Liquid nitrogen
Nitrogen Refrigeration cycle
Liquid nitrogen tank
Heat exchanger Heat exchanger
1. The liquid nitrogen is fi rst run through a heat exchanger, where it provides cooling to the temperature controlled compartments much like a second generation nitrogen system.
2. The liquid nitrogen is then expanded in the Dearman Engine, where it is mixed with a water/glycol heat exchange fl uid to enhance power and effi ciency.
3. The engine drives a secondary refrigeration system for more cooling and generates electrical power for the system’s fans and lights.
4. The water/glycol heat exchange fl uid is recovered and recycled. (Non-toxic poly-ethylene glycol, also used for de-icing roads, is used in our system).
The Dearman system produced non of the pollution or waste heat of diesel. By capturing the expansion of the liquid nitrogen, the Dearman engine makes the Dearman TRU far more effi cient than evaporation-only systems. The Dearman Engine is therefore the needed piece of technology that unlocks LiN as a competitive energy source. It also enables the TRU to be wholly independent of the vehicle’s propulsion engine.
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Customised solutions
Undermount solutions Nosemount solutions
The Dearman zero emission TRU undermount solution is confi gurable on rigid trucks >18T, draw bar trailers and articulated semi trailers and offers multi-temperature compartments and/or lanes with a cooling capacity of 16kW at -20℃, with a potential to meet 60dB(A) PIEK* standard for maximum quiet operation.
The Dearman zero emission TRU nosemount solution is confi gurable on draw bar trailers and articulated semi trailers and offers multi-temperature compartments and/or lanes with a cooling capacity of 16kW at -20℃, with a potential to meet 60dB(A) PIEK standard for quiet operation.
*The PIEK standard has been adopted in several countries including: Belgium, France, Germany, Netherlands & UK.
How the Dearman engine works in transport refrigeration
LiN Tank-196℃
SHAFT POWER
LiN pumped to the heat exchanger
LiN expands& produces
power
HEF recovered and recycled
Thermal expansion
valve
HEAT EXCHANGE FLUID (HEF)
EXHAUST NITROGEN
GAS
P
TEMPERATURE CONTROLLED COMPARTMENT
SHAFT POWERCompressor
Heat Exchanger Evaporator
Separator
TXV
Heat ExchangerCondenser
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Dearman transport refrigeration
Specifi cationsUndermount and nosemount solutions available.
*This depends on carbon intensity of electricity used for LiN production: 30% to 85% for average country grid electricity; 96% is for renewable electricity
Truck compatibility Rigid trucks >18T, draw bar trailers and articulated semi-trailers
Payload area confi guration Multi-temperature in up to 3 separate refrigerated zones. Compartment and/or lanes confi guration
Controls Digital controls – including in-cab control unit. Real time remote data
Cooling capacity 16kW at -20ºC
Pull down rate < 30mins from +15ºC to -21ºC in an 18T rigid body
Operating capacity between refuelling One to two days, depending on duty cycle
Noise uninsulated <65dB(A); potential to meet 60dB(A) PIEK with insulation pack where required
NOx and PM emissions 0
CO2 reduction compared to diesel refrigeration unit 30% - 85%, and potentially by 96% saving per vehicle (Well-to-Wheel)*
Dearman TRUs require less maintenance than conventional diesel powered systems. Unlike diesel engines, the Dearman engine does not contaminate its lubricant through combustion, and requires no cooling system or air fi lter.
Reduced maintenance
Dearman’s technology and its high cooling power ensures precise temperature control on the most demanding delivery cycles. This helps to ensure that product quality is maintained during transport.
Precise temperature control
www.dearman.co.uk
+44(0)203 829 0035 www.dearman.co.uk @DearmanLtd DearmanEngineCompanyLtd [email protected]
Dearman is a company pioneering the development of clean ‘cold and power’ to achieve major improvements in resource effi ciency, greenhouse gas emissions and air pollution of cooling. Uniquely harnessing the power
of liquid nitrogen Dearman technologies have applications in transportation, logistics and the built environment.
Dearman, helping to make the world a cleaner, cooler place.
Dearman, Unit 5 Stafford Cross Business Park, Stafford Road, Croydon, Greater London, CR0 4TU
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