Today, customers must also focus on the cost of energy and the environmentally damaging effects of Freon's and their replacement refrigerants. Since our products reduce energy usage by up to 94 percent and some product use no refrigerants, they have been an important part of our customer's cost-savings programs.
▋Industrial chiller technology
Industrial chillers typically come as complete, packaged, closed-loop systems, including the chiller unit, condenser, and pump station with recirculating pump, expansion valve, no-flow shutdown, internal cold water control. The internal tank helps maintain cold water temperature and prevents temperature spikes from occurring. Closed-loop industrial chillers recirculate a clean coolant or clean water with condition addititives at a constant temperature and pressure to increase the stability and reproducibility of water-cooled machines and instruments. The water flows from the chiller to the application's point of use and back.
♦Standard temperature source
The essence of thermostat system is can provide accurate and stable temperature environment. EXCELLNT has own standard accuracy ±0.01℃ temperature source.
Better technologyBetter life!
Vapor-compression chiller technology
Important specifications to consider when searching for industrial chillers include the total life cycle cost, the power source, chiller IP rating, chiller cooling capacity, evaporator capacity, evaporator material, evaporator type, condenser material, condenser capacity, ambient temperature, motor fan type, noise level, internal piping materials, number of compressors, type of compressor, number of fridge circuits, coolant requirements, fluid discharge temperature, and COP (the ratio between the cooling capacity in RT to the energy consumed by the whole chiller in KW). For medium to large chillers this should range from 3.5-7.0 with higher values meaning higher efficiency. Chiller efficiency is often specified in kilowatts per refrigeration ton (kW/RT).
Process pump specifications that are important to consider include the process flow, process pressure, pump material, elastomer and mechanical shaft seal material, motor voltage, motor electrical class, motor IP rating and pump rating. If the cold water temperature is lower than −5°C, then a special pump needs to be used to be able to pump the high concentrations of ethylene glycol. Other important specifications include the internal water tank size and materials and full load current.
Control panel features that should be considered when selecting between industrial chillers include the local control panel, remote control panel, fault indicators, temperature indicators, and pressure indicators.
thermoelectric module chiller technology
A thermoelectric module "pumps" heat from one ceramic face to the other ceramic face when DC current is applied. Unlike the compressor in a standard refrigeration system that pumps Freon, thermoelectric modules use electrons to transfer heat. Thermoelectric modules can also work in reverse, generating DC current (power) if one side is hot and the other is cold.
▋Use in industry
Chilled water is used to cool and dehumidify air in mid- to large-size commercial, industrial, and institutional (CII) facilities. Water chillers can be water-cooled, air-cooled, or evaporatively cooled. Water-cooled chillers incorporate the use of cooling towers which improve the chillers' thermodynamic effectiveness as compared to air-cooled chillers. This is due to heat rejection at or near the air's wet-bulb temperature rather than the higher, sometimes much higher, dry-bulb temperature. Evaporatively cooled chillers offer higher efficiencies than air-cooled chillers but lower than water-cooled chillers.
Water-cooled and Air-cooled
Water-cooled chillers are typically intended for indoor installation and operation, and are cooled by a separate condenser water loop and connected to outdoor cooling towers to expel heat to the atmosphere.
Air-cooled and evaporatively cooled chillers are intended for outdoor installation and operation. Air-cooled machines are directly cooled by ambient air being mechanically circulated directly through the machine's condenser coil to expel heat to the atmosphere. Evaporatively cooled machines are similar, except they implement a mist of water over the condenser coil to aid in condenser cooling, making the machine more efficient than a traditional air-cooled machine. No remote cooling tower is typically required with either of these types of packaged air-cooled or evaporatively cooled chillers.
Whole and split
The Chiller needs to remove the heat from the cooled object. The Chiller all in the same frame are called integral type, and the separated type is called split type. Although the integrated type occupies a small area, the indoor heat exhaust will affect the indoor temperature. Generally, the Chiller body is placed indoors in split type, and the heat exhaust part is placed outdoors.
In the low temperature region where water will freeze or in the high temperature region where water will evaporate, liquids other than water should be selected.
▋Ethylene glycol/water
The freezing point is -12.6℃, which can be mixed with water in any proportion and used as solvent and antifreeze.
Precautions for selecting ethylene glycol as coolant
- The freezing point changes with the concentration of ethylene glycol in the aqueous solution. When the concentration is below 59%, the concentration of ethylene glycol in the aqueous solution increases and the freezing point decreases. However, when the concentration exceeds 59%, the freezing point increases with the concentration of ethylene glycol. When the concentration reaches 100%, the freezing point rises to -13℃.
- Glycol contains hydroxyl, and it is easy to oxidize into acid when it works at 80 ℃~90 ℃ for a long time, causing corrosion to water tank and water jacket and causing leakage. Therefore, in the prepared antifreeze, there must also be preservatives to prevent corrosion of steel and aluminum and the formation of scale.
▋Fluorinated liquid
3M™ Novec™，Galden® PFPE They are high-performance, inert and fluorinated liquids used for heat conduction and various high-tech applications in the electrical, electronic and semiconductor markets. The freezing point of fluorinated series liquid can be below -100℃, and the boiling point can be above 100℃.
Precautions for selecting fluoride liquid as circulating liquid
- Do not mix with other liquids, the liquid very expensive.
- The specific gravity is greater than water, and its dynamic viscosity will be less than water according to the use temperature zone. Because of the particularity of the liquid, special pump head is selected or the circulation structure is specially designed.
1）Determine the heating capacity of the controlled object and the flow rate of circulating liquid
Chiller uses liquid circulation to remove heat from the controlled object to keep the controlled object at a constant temperature. Therefore,
when selecting Chiller, it is necessary to determine.
◆The temperature difference between the inlet and outlet of the controlled object at the flow rate (L/min or m3/h) of liquid will be in
degrees Celsius, so as to calculate the heating capacity of the controlled
object and select the cooling power of Chiller.
◆Given the calorific value of the controlled object, the maximum allowable temperature difference between the inlet and outlet of the controlled
object is given, and the flow of the Chiller pump is selected.
Industrial chiller selection
Important specifications to consider when searching for industrial chillers include the total life cycle cost, the power source, chiller IP rating, chiller cooling capacity, evaporator capacity, evaporator material, evaporator type, condenser material, condenser capacity, ambient temperature, motor fan type, noise level, internal piping materials, number of compressors, type of compressor, number of fridge circuits, coolant requirements, fluid discharge temperature, and COP (the ratio between the cooling capacity in RT to the energy consumed by the whole chiller in KW). For medium to large chillers this should range from 3.5-7.0 with higher values meaning higher efficiency. Chiller efficiency is often specified in kilowatts per refrigeration ton (kW/RT).
Process pump specifications that are important to consider include the process flow, process pressure, pump material, elastomer and mechanical shaft seal material, motor voltage, motor electrical class, motor IP rating and pump rating. If the cold water temperature is lower than −5°C, then a special pump needs to be used to be able to pump the high concentrations of ethylene glycol. Other important specifications include the internal water tank size and materials and full load current.
Control panel features that should be considered when selecting between industrial chillers include the local control panel, remote control panel, fault indicators, temperature indicators, and pressure indicators.
Additional features include emergency alarms, hot gas bypass, city water switchover, and casters.