Showing posts with label low temperature chiller. Show all posts
Showing posts with label low temperature chiller. Show all posts
Thursday, July 19, 2018
Introduction To The Preparation Of Low Temperature Chiller' Operation
Why do low temperature chiller need to be ready for operation? We must be very clear that only when we are ready to check the low temperature chiller can we run the equipment better, can we run it more efficiently.
Before running the low temperature chiller, we need to check the refrigerant, water and electrical equipment, and check the oil separator liquid level, the correct oil position should be in the oil mirror center line between the line.
Be careful to check that all the pressure gauges for the low temperature chiller are open, and whether the oil thermometer has been inserted with the lubricating oil, and check or open all the valves on the oil road that they should be completely open.
Push the start button, the low temperature chiller starts, and then wait to see whether the oil pump is turning correctly, the oil pressure difference is not low than the surface pressure of 0.05-0.3Mpa, and the pressure difference of the oil filter does not exceed 0.1Mpa. Turn the coupling and operate the energy control valve at the same time, so that the unloading indication goes from 0%--100%, then 100%--0%, then manually stop the oil pump.
Try low temperature chiller with hand disc compressor coupling, no card resistance phenomenon shows the normal state. Open the exhaust valve on the compressor, water supply to the oil cooler, and water temperature depends on the oil temperature (the nozzle oil temperature is better to be 40 --55 c). At the same time, water supply to the condenser and evaporator , finally cover the main motor power supply, and the power lamp is on, then the low temperature chiller can be used normally.
With these detailed preparations, it is certain that the low temperature chiller can be better used to achieve the lowest cost and maximum operational efficiency.
Contact LNEYA for more dynamic temperature control equipments.
Monday, July 16, 2018
Refrigeration Principle Of Low Temperature Chiller
The refrigeration principle of the so-called low temperature chiller is to use the artificial method, compressor refrigeration, through energy consumption, in a cycle process, in the process that cooling materials take away the heat. Generally speaking, the compressor is use to refrigerate. With the refrigerant, the low boiling point material is used as the medium. The refrigerant is compressed in the compressor, the saturation temperature is higher than the ambient temperature, then it passed through the condenser and is condensed into liquid, liquefied through the throttle valve, and then the heat is absorbed by the cold medium to become the low pressure steam, finally it returns to the compressor cycle.
In addition to compressor refrigeration, there is ammonia refrigeration. However, the overall cost of compressor refrigeration is lower than that of ammonia refrigeration. So now, we tend to choose compressor refrigeration.
After understanding the principle of refrigeration, the selection of a series of equipment parameters such as water flow, outlet temperature and cooling capacity of low temperature chiller should be fully understood in order to make a better selection.
Of course, the refrigerants of low temperature chillers can be environmental refrigerants as far as possible, for the sake of more energy saving and environmental protection and in line with the demand of the public.
Contact LNEYA for more dynamic temperature control equipments.
Friday, June 8, 2018
Low Temperature Chiller LN -60℃～-10℃
Low Temperature Chiller LN -60℃～-10℃
-60℃～-10℃Technical Parameters:
Low circulator, Low temp circulator, Constant temp circulator, Low circulator, Low temp, circulation bath, Circulators bath, Circulation bath, Circulators, Chiller, Cooling circulators, Cooling bath circulators, Cooling thermostat, Refrigeration bath circulators, Refrigeration circulator, Refrigeration thermostats, Refrigeration bath circulator, Low temp freezer, Freezer, Low freezer, Low chiller, Freezer chiller, Cold trap, Immersion cooler, Low temp bath, Bath thermostats.| Model | LN-6W | LN-10W | LN-15W | LN-20W | LN-30W | LN-40W | LN-60W | LN-90W | LN-120W | LN-180W |
| Temp. range | -60°C~ -10°C | |||||||||
| Cooling capacity | 12kw | 20kw | 30kw | 40kw | 60kw | 80kw | 120kw | 180kw | 240kw | 360kw |
| At -40°C Kcal/h | 10320 | 17200 | 25800 | 34400 | 51600 | 68800 | 103200 | 154800 | 206400 | 309600 |
| Cooling capacity | 6kw | 10kw | 15kw | 20kw | 30kw | 40kw | 60kw | 90kw | 120kw | 180kw |
| At -55°C Kcal/h | 5160 | 8600 | 12900 | 17200 | 25800 | 344000 | 51600 | 77400 | 103200 | 154800 |
| Circulation pump | 6.6m³/h | 9m³/h | 15m³/h | 15m³/h | 25m³/h | 25m³/h | 25m³/h | 35m³/h | 35m³/h | 50m³/h |
| 2.5bar | 2.5bar | 2.5bar | 2.5bar | 2.5bar | 2.5bar | 2.5bar | 2.5bar | 2.5bar | 2.5bar | |
| Connection size | DN-25 PN-10 | DN-25 PN-10 | DN-32 PN-10 | DN-32 PN-10 | DN-40 PN-10 | DN-40 PN-10 | DN-40 PN-10 | DN-50 PN-10 | DN-50 PN-10 | DN-65 PN-10 |
| Cooling water 30 DEG | 10m³/h | 14m³/h | 20m³/h | 25m³/h | 30m³/h | 35m³/h | 50m³/h | 70m³/h | 90m³/h | 120m³/h |
| Cool storage tank (optional) | 200L | 350L | 500L | 750L | 1000L | 1200L | 1500L | 2200L | 3000L | 4000L |
| Expansion tank (optional) | 100L | 175L | 250L | 350L | 500L | 600L | 750L | 1000L | 1350L | 1800L |
| Compressor | Standard: Dorin semi-closed compressor | Standard: Hanbell screw compressor | ||||||||
| Optional: Bitzer screw compressor | ||||||||||
| Operation panel | 7 inch color touch screen display input, temperature curve record. | |||||||||
| Control system | Standard: single chip microcomputer controller, position setting to open refrigeration and close refrigeration temperature difference. | |||||||||
| Optional: Siemens S7 series PLC and module. | ||||||||||
| Circulation system | The whole system is fully closed system. The heat conduction medium does not absorb the water in the air and will be replenished automatically at low temperature. The system will not increase the pressure due to the high temperature in the operation. | |||||||||
| Circulation pump | Wuxi guanya tube type centrifugal pump. | |||||||||
| Evaporator | Standard: Brazing plate heat exchanger. | |||||||||
| Optional: stainless steel tube heat exchanger. | ||||||||||
| Condenser | Shell and tube type water cooled condenser. | |||||||||
| Intermediate heat exchanger | Plate heat exchanger. | |||||||||
| Drying filter | Emerson | |||||||||
| Dry filter element | Emerson | |||||||||
| Expansion valve | Emerson | |||||||||
| Refrigeration solenoid valve | Emerson | |||||||||
| Oil separator | Emerson | |||||||||
| Pressure protector | Emerson | |||||||||
| Reservoir | ||||||||||
| Sight glasses | Standard: Sanhua Optional: Danfoss | |||||||||
| Refrigeration ball valve | Standard: Sanhua Optional: Danfoss | |||||||||
| Electricity | Schneider electric contact, schneider intermediate relay. | |||||||||
| Refrigerant | R404A | |||||||||
| Secondaryrefrigerant | Non-corrosive liquid, ethanol aqueous solution, thermal conductivity oil, etc. | |||||||||
| Security and protection | High pressure protection, water break protection, current protection, leakage protection, continuous and broken phase protection, high temperature protection, sensor fault alarm, low level alarm and other multiple security protection. | |||||||||
| Level indicator | Glass level indication. | |||||||||
| Piping material | SUS304 | |||||||||
| Expansion tank volume | SUS304 | |||||||||
| Shell material | Channel steel + square pipe + cold rolled steel | |||||||||
| Dimension cm | 180*120 *175 | 205*145 *175 | 205*145 *175 | 205*145 *175 | 235*145 *175 | 235*145 *175 | 350*150 *205 | 350*150 *205 | 400*180 *205 | 450*200 *2050 |
| Power supply max | 380V 50HZ | 380V 50HZ | 380V 50HZ | 380V 50HZ | 380V 50HZ | 380V 50HZ | 380V 50HZ | 380V 50HZ | 380V 50HZ | 380V 50HZ |
| 14kw | 18kw | 26kw | 35kw | 52kw | 69kw | 104kw | 152kw | 200kw | 300kw | |
| Noise | Within 75db | Within 80db | Within 90db | |||||||
| Weight | 850kg | 1000kg | 1200kg | 1450kg | 2000kg | 2400kg | 3000kg | 3600kg | 4200kg | 5600kg |
We know that the low temperature chillers are complicated equipment. Even the switch process, if not according to the standard of operation or with no special maintenance, will inevitably lead to a decline in the refrigeration efficiency of the low temperature chillers and will greatly reduce the service life of the them. Here, we will talk about major attention matters when enterprises use low temperature chillers!
1. Refrigerant leakage
Refrigerant leakage will not only affect the refrigeration efficiency of low temperature chillers, but also affect the health of people in and out of the engine room, so the issue of refrigerant leakage must be noted.
2. Pay attention to the load of the low temperature chillers
The large load of low temperature chillers, or overload phenomenon which is more than the rated load, will bring about serious problems including refrigeration efficiency decline, bigger noise, bigger vibration amplitude, excessive consumption of resources, decline in service life and so on which need to pay attention to!
3. Temperature and pressure
It can be said that the parameters related to temperature and pressure are the most important parameters of low temperature chillers. Enterprises should pay attention to the parameters related to the temperature and pressure of the low temperature chillers, and solve them in time, so as to avoid affecting the normal operation of the low temperature chillers.
Paying attention to the points mentioned above has extraordinary importance for extending the service life of low temperature chillers ,and improving the refrigeration efficiency and the use safety of low temperature chillers.
Contact Lneya for more.
1. Refrigerant leakage
Refrigerant leakage will not only affect the refrigeration efficiency of low temperature chillers, but also affect the health of people in and out of the engine room, so the issue of refrigerant leakage must be noted.
2. Pay attention to the load of the low temperature chillers
The large load of low temperature chillers, or overload phenomenon which is more than the rated load, will bring about serious problems including refrigeration efficiency decline, bigger noise, bigger vibration amplitude, excessive consumption of resources, decline in service life and so on which need to pay attention to!
3. Temperature and pressure
It can be said that the parameters related to temperature and pressure are the most important parameters of low temperature chillers. Enterprises should pay attention to the parameters related to the temperature and pressure of the low temperature chillers, and solve them in time, so as to avoid affecting the normal operation of the low temperature chillers.
Paying attention to the points mentioned above has extraordinary importance for extending the service life of low temperature chillers ,and improving the refrigeration efficiency and the use safety of low temperature chillers.
Contact Lneya for more.
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