Store your samples in confidence with a NuAire Freezer
Aug 05 2015
NuAire’s -86?C Ultralow Temperature Freezers energy efficient cascade cooling system monitors temperature and pressures throughout high and low stage circuits. The Inner chamber is surrounded by foam-in-place polyurethane insulation from all sides. Two insulated inner doors maintain interior temperature during openings. Multiple point gasket seals lock in cool temperatures while keeping out ambient air. A heated bypass coil around the inner doors reduces frost build-up creating consistent temperature uniformity and reliable environment throughout the chamber increasing your cell viability.
Microprocessor controls are simple to use monitoring and controlling temperature and alarm set points. Visual and audible alarms for high and low temperature, power failure, sensor failure, battery life, fan motor life, filter check, and door ajar. The Controls also operates cooling functions creating optimal storage conditions while minimising energy consumption.
Glaciers refrigeration system cools the oil which runs the compressors, enabling them to run longer, providing greater temperature uniformity, increasing reliability.
NuAire’s freezers are RoHS compliant; utilise CFC-free refrigerants and insulation eliminating ozone depletion while efficient compressors minimise energy consumption reducing our carbon footprint.
NuAire offers several models with various footprints and interior capacities. With reliable biological storage, eye level controls, claw-like door latches, low force door opening, exceptionally quiet 47 dBa operation, ergonomic design, rounded corners for easy cleaning, the industry's best temperature uniformity, and optional backup systems, all together create a friendly working environment. With NuAire’s ultralow temperature freezers you can store you samples in confidence.
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Freezer Cascade System references:
[A] Low Stage Capillary Tube
Liquid refrigerant under pressure is passed through the capillary tube where it evaporates in the low stage evaporator to absorb heat energy from the product stored in the freezer.
[B] Evaporator Coil
The evaporator coil is wrapped around the exterior shell to provide proper temperature uniformity within vacuum insulation panels and foamed-in-place urethane insulation.
[C] Capillary Tube
Low stage capillary tube heat exchanger provides heat transfer between high and low temperature points offering better energy efficiency.
[D] Low Stage Refrigerant
Commonly available worldwide, R508.
[E] Low Stage Heat Exchanger
Heat is efficiently transferred from the low stage to the high stage.
[F] Low Stage Compressor
The compressor pumps refrigerant through the low stage circuit.
[G] Air Cooled Pre-Condenser
Removes heat energy from the high stage refrigerant en route to the low stage compressor.
[H] Low Stage Oil Heat Exchanger
High stage refrigerant passes through the low-stage oil pump to cool oil resulting in high-stage refrigerant being used to increase the durability of the low stage compressor.
[I] Interstage Heat Exchanger
To increase overall system efficiency heat energy is transferred to the high stage circuit.
[J] High Stage Oil Heat Exchanger
High stage refrigerant passes through the high stage oil to cool lubricating oil en route to the low stage compressor through the air-cooled pre-condenser. Thereby increasing the reliability of the high stage compressor.
[K] High Stage Capillary Tube
Liquid refrigerant under pressure is passed through the capillary tube where it evaporates in the inter stage heat exchanger to absorb heat energy from the low stage refrigerant circuit.
[L] Main Condenser and Motor/Fan
An exclusive triple pass forced air condenser increases overall system efficiency by providing maximum surface area for heat rejection.
[M] High Stage Refrigerant
Commonly available worldwide. Selected for optimum cooling performance incompliance with international environmental protection laws.
[N] Air Cooled Pre-Condenser
Removes heat energy from the high stage refrigerant en route to the high stage oil reservoir.
[O] High Stage Compressor
The compressor pumps refrigerant through the high stage circuit.
[P] Instrumentation (Not Shown)
Temperature and pressure sensors throughout the high and low stage circuits transmit information to the ‘Status Alert’ central controller for operation, monitoring, interpretation and component protection.
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