Performance Comparisons
- Instantaneous dispersal of cold air at settemperature
- Approximately 80% faster in achieving pull–down
- Even temperature throughout the load space
- Eliminates top freezing
- Eliminates hot spots
- Prevents spoilage and improves product shelf life.
- No air circulation or fans are required, therebygreatly reducing energy consumption
- Operates for up to 90 hours before refuelling
- Ideal for long–haul, international work includingmulti–temperature and double deck applications
- Pull–down: 15 minutes to reach 0°C, 30–45minutes to –20°C
- Holds temperature at +30°C to +4°C with heating option
- Simple to operate – user friendly
- 12v primary power allows 48 hours independant operation
- Standard system weight 998kgs
- No Hazchem regulations apply
Operational Cost Comparisons: Nitrogen against Diesel
Cost Estimate – based on typical Frozen / Chilled Operation (-25 to +3).
FUEL
| Annual Operating Hours: 2000 | |
|---|---|
| EcoFridge (Nitrogen)20 litres per hour @ £.05p 40,000 Litres, Annual cost £2,000 |
Mechanical System (Diesel) * 3.5 litres per hour @ £0.58p (Red) * 7,000 litres, Annual cost £4,060 |
| EcoFridge: Labour for Fuelling(90 hours operation between fills) Approx. 22 fills per annum @ 15 mins per fill = 5.5 hours @ £10 per hour = £55 per annum |
Mechanical: Labour for Fuelling(59 hours operation between fills. 3.5 litres per hour – 7,000 per annum) Approx. 34 fills per annum @ 10 mins per fill = 5.6 hours @ £10 per hour = £57 per annum |
| Fuel consumption £2,000Labour to fill £55 Annual Total £2,110 Total cost per hour £1.05 |
Fuel consumption £4,060Labour to fill £57 Annual Total £4,117 Total cost per hour £2.06 |
Note 1: Consumption is based on product being at temperature within 2 degrees of set point.
* Price quoted by Shell on 12 April 2008.
MAINTENANCE
| Annual Operating Hours: 2000 | |
|---|---|
| EcoFridge (Nitrogen)7 hours per annum @ £45 (based on ecoFridge operational assumptions) Annual total £315 |
Mechanical System (Diesel)25 hours per annum @ £45 Annual total £1,125 |
ANNUAL TOTAL FUEL & MAINTENANCE COMBINED
| Annual Operating Hours: 2000 | |
|---|---|
| EcoFridge (Nitrogen)£2,425.00£1.21 pence per hour | Mechanical System (Diesel)£5,185.00£2.59 pence per hour |
An additional saving can also be factored in to reflect ‘down-time’ savings.
- Configurations: Nitrogen Certified Tanks for road operation -ATP-
- - 1 x 650 l - 500mm diameter (minimum for semi-trailer)
- - 1 x 1000 l - 800mm diameter
- - 2 x 650 l - 500mm diameter
- - 1 x 450 l - 500mm diameter
- Configuration with 1, 2 or 3 zones or compartments
- - One Nitrogen Sprayer per zone
- - Each compartment can operate independantly with solid bulkhead
- Temperature control (2 sensors per sprayer, 1 redundant)
- - Temperature managed from internal or external control panels
- - Single or multi temperature
- Safety system with O2 sensors controlling entry in each compartment
- - Safety System going on when any door opens (light and sound)
- - System goes back to cool when doors closed.
- Heating system
- - Overhead propane heater
- Nitrogen Fill System
- - Manual connect and automatically fill and turn-off
- Energy
- - 2 Batteries 12v - 120 Ah
- - Charger connected to tractor or truck or stand-by 220 volts
| Performance Comparisons ecoFridge vs. Mechanical | |
|---|---|
| ecoFridge | Mechanical |
| Noiseless silent running | High noise level |
| Pollution Free no harmful emmissions | Polluting -CO2emmissions |
| Pull-down of empty trailer (worst case) from +15°c to -20°c with +50°c ambient in 45 minutes | Up to 4 hours; depending on age and condition of unit + condition of trailer |
| Consumption of Nitrogen 10 to 15L per hour | N/a |
| Operational time 70-90 hours between refill | N/a |
| Multi-temp without additional cost | Multi-temp with significant additional cost |
| Maintenance Free | High maintenance: increasing significantly with age |
| 20 yr. Life expectancy, only revacuuming required. | 8 12 year life expectancy with significant increase in service requirements |
| Heater optional, integrated to cooling system | Heat part of standard system |
| O2 detection device part of system | N/a |
| No loading constraints | Top freezing often occurs |
| Can accept 110, 220, 440 external power standard | Can accept same |
| Internal emergency turn off | N/a |
| Driver real time visible alert system | None |
Air is cooled by the evaporator and projected by the fan on top of the goods at high speed and around 60 times per hour and return to the evaporator. This requires more than 1000 watts energy.
The goods are kept at right temperature by a low Nitrogen down-flow s urrounding the pallets at set-up
