|
Content
3.1 Compressor
3.2 Evaporator
3.3 Water Pump
3.4 Condenser
3.5 Controller Panel
|
1.Low Temperature Glycol Chillers On The Application
At general refrigeration systems, our aim is to provide affordable cooling solutions to a wide range of industries by offering standard packaged units as well as units custom-made to your specifications.
We have designed our air-cooled glycol chillers to accommodate a range of low temperature applications,such as breweries,distilleries,wineries, pharmaceutical,and food& beverage industry.
We know that not every application requires such low temperature, so we provide cooling capacity by leaving fluid temperature charts for our most popular models.
Glycol is recommended for all chiller units when operating temperatures are below 41°F (5°C).
A glycol chiller ,also called a low temperature chiller or glycol refrigeration system, is an industrial process chiller that uses a water and glycol mixture as a coolant which allows it to efficiently transfer heat and maintain temperature control in different kinds of industrial applications, particularly in applications that involve cooling liquids or equipment.
Air Cooled Glycol Screw Chiller
3.What Are The Main Components of Air Cooled Glycol Screw Chiller?
3.1 Compressor
The compressor is the key mover in Air Cooled Screw Glycol Chiller because it produces pressure variations to stir the refrigerant around.
For 50Ton chiller , which is with 1 units Hanbell Screw brand or Bizter Screw compressor for optional depends on the required refrigeration capacity, using R404a refrigerant,this brand compress is with high refrigeration efficiency,low noise ,energy saving,environmental protection and durability,safety and stability.
Each screw compressor with 4 steps of energy control 25%-50%-75%-100% to make sure the whole screw chiller is stable and guarantee high refrigeration performance.
Hanbell Screw Compressor
Bizter Screw Compressor
3.2 Evaporator
The evaporator is a crucial component of air cooled screw glycol chiller, as it is responsible for extracting heat from the liquid being cooled,it is located between the compressor and the expansion valve. Air Cooled Screw Chiller Uses highly efficient closed loop shell and tube type heat exchanger as the evaporator.
Shell and Tube Evaporator
3.3 Condenser
The condenser for air cooled screw chiller is equipped with efficient cross-seam fins and female threaded copper tubes for high heat exchange efficiency and good stability.Its function is to cool down the refrigerant steam released from the compressor into a liquid or gas-liquid mixture.
Aluminum fin+fan Condenser
3.4 Controller Panel
Tongwei chillers use Integrated PLC control system with human-computer interface and big LED touch screen panel.
PLC Controller Panel
4.What is the Difference Between Air Cooled Glycol Scroll Chiller and Air Cooled Glycol Screw Chiller?
Air Cooled Glycol Scroll Chiller Air Cooled Glycol Scrre Chiller
▪ 1hp-60HP Above 60HP
▪ Danfoss/Panasonic Scroll Compressor Hanbell/Bitzer Screw compressor
▪Built with water tank and water pump Without water tank and water pump
5.Why Glycol Is Used for Cooling?
The most commonly used coolant in a chiller is water or a mixture of water-glycol. Glycol-based coolants consist of either ethylene glycol or propylene glycol. The main advantage of glycol coolants is their anti-freeze properties. Pure water freezes at 0 degrees C, while 30% ethylene glycol freezes at -14 degrees C. The low freezing point of glycol mixtures makes them ideal for cooling items that are below the freezing point of water. Although glycol has a lower heat capacity than water (each kilogram of glycol is easier to heat than one kilogram of water), the high temperature difference allows the glycol mixture to dissipate heat more quickly than pure water. The glycol mixtures are more suitable for applications where the chiller must quickly dissipate a large number of heat. In addition to providing excellent heat transfer parameters, glycol tends to discourage algae growth in heat transfer equipment.
Comparison of Ethylene Glycol and Propylene Glycol
Comparison of Ethylene Glycol and Propylene Glycol
Property Ethylene Glycol Propylene Glycol
Freeze point depression More effective Less effective
Heat transfer efficiency/capacity Better Less
Viscosity Lower Higher
Flammability Low Low
Chemical Oxygen Demand Low Higher
Biodegrading Degradesin 10-30 days Needs more than 20-30 days to degrade
Carcinogenic No No
Toxic High level of acute when taken orally, Lower level of acute
targets the kidneys
targets the kidneys
Skin Irritant Low Low
Ethylene Gycol And Propylene Glycol
6.How Does A Glycol Chiller Work?
A glycol chiller is composed of a refrigeration component and tubing containing a water-glycol mixture as coolant. Chilled fluid from the refrigeration unit is channeled through the piping associated with a thermal exchanger surrounding a heated process. After absorbing heat from the associated process, the hot coolant is returned to the refrigeration unit for cooling after which the process is repeated.
A glycol chiller consists of a compressor, an evaporator, a condenser, a throttling element, and an electric control system. Let’s see what’s the working principle of a glycol chiller:
Glycol Chiller Working Principle
7.The Ratio of Water to Glycol to Use
It is important to use the proper ratio of glycol to water mixture in the cooling system depends on the coldest temperature you need during operation, as insufficient glycol can cause the system to freeze, possibly bursting pipes and even destroying the chiller evaporator even may damage the glycol chiller, while too much glycol to a chiller system will result in an inefficient system.
But what’s the best ratio for glycol and water mixtures? Pls see below glycol ratio of glycol and water mixtures for the glycol chillerin your cooling process:
Glycol Water Water Temperature
Glycol Water Water Temperature
16% 84% 0℃
24% 76% -5℃
32% 68% -10℃
40% 60% -15℃
45% 55% -20℃
50% 50% -25℃
55% 45% -30℃
8.2 Wineries
Glycol Chiller for Cider Mills
Glycol Chiller for Distilleries
8.What Applications Can A Glycol Chiller Be Used For?
Glycol chiller is a specific kind of cooling system,which is used to cool a variety of liquids and other industrial applications.
By using a glycol chiller can achieve the low temperature for your industrial usage you need .
Glycol chillers are most used for below these Industries:
8.1 Breweries
In breweries, the glycol chiller is used for cooling the wort,Controlling Fermentation,Crash Cooling Vessels,Prepackaging and Product Storage.
Glycol Chiller for Breweries
8.2 Wineries
Glycol chillers are widely used in the fermentation process, cold stabilization and room cooling purposes.
Glycol Chiller for Wineries
8.3 Cider Mills
Fermentation control needs critical water temperature control. Glycol chiller can provide cold chilling of the juice and milk, also the cold storage of the final product.
Glycol Chiller for Cider Mills
8.4 Distilleries
During the fermentation process, the glycol chiller will provide a steady coolant for circulation between distillation tanks & stills for heat removal purposes.
Glycol Chiller for Distilleries
8.5 Food Industry.
Glycol chillers can provide low-temperature coolant to guarantee the safety and consistent quality of frozen foods, food processing companies need a low-temperature cooling day in and day out.
Glycol Chiller for Food Industry
8.6 Dairy Product
A properly designed dairy glycol chiller can cool the milk very rapidly to help keep milk temperatures (and bacteria growth) under control as it is transferred from the milking parlor to its insulated tank.
Glycol Chiller for Dairy Product
Do you need a glycol chiller for an application not mentioned here? Contact us and we’ll customize an affordable solution for your exact demands.
9.How to Choose Right Glycol Chiller for your Application?
It is very important to select the right glycol Chiller for application process, if you want proper and durable cooling,please see blow key points:
9.1 Air-Cooled Screw Glycol Chiller or Water-Cooled Screw Glycol Chiller
There are two types of glycol chiller: one is air-cooled type, the other one is water-cooled type.
Air cooled screw glycol chillers use aluminum fin+fan as condensers that is similar to the “radiators” in a car.They use a fan to force air through the refrigerant coil. Unless they are specifically designed for high ambient conditions, air-cooled condensers need to operate effectively at an ambient temperature of 45℃ or less.
Water cooled screw glycol chiller use shell and tube as condensers.The heat enters the condenser water from the refrigerant vapor. The warm condenser water is then pumped to the water cooling tower, where the heat from the process is eventually vented to the atmosphere.
Air-cooled Screw Glycol Chiller Installation for Reference
Water-cooled Glycol Chiller Installation for Reference
Water-cooled Glycol Chiller Installation for Reference
9.2 Cooling capacity
When you choose a suitable chiller model , you need to know the cooling capacity in KW/TON.How to calculate the cooling capacity you need? Please see the below formula:
Cooling Capacity(kw)= Flow Rate(m3/h)*Temp Change(T1-T2)/0.86
Heat Load= C(specific heat)* M(quality output per hour )*Temp Change(T1-T2)
Oversize the chiller by 20% Ideal Size in KW = KW x 1.2
Noted : T1:Incoming Water Temperature (℃) T2:Required Chilled Water Temperature(℃)
For example, what size of chiller is required to cool 5m³ water from 25°c to 15 °c in 1 hour?
Temperature Differential = 25℃-15℃=10℃
Water Flow Rate = 5 m³/hour
Cooling Capacity in KW = 5 x 10 ÷ 0.86 = 58,14 KW
Oversize the chiller = 58.14 x 1.2 = 69.76 KW
69.96kw cooling capacity for chiller is required.
9.3 Power
Different countries and regions have different standards for industrial electricity, the common power supplies are 208-230V, 380-420V,440-480V,50Hz or 60Hz, 3phase.
Such in Philippines ,the power supply is 220V 60HZ 3PH , 380V 60HZ 3PH ,460V 60HZ 3PH;
in Singapore and Malaysia ,the power supply is 415V 50HZ 3PH;
in Mexico ,the power supply is 220V 60HZ 3PH;
In USA ,the power supply is 208V 60HZ 3PH;575V 60HZ 3PH;480V 60HZ 3PH and so on
9.4 Water Pump
When you decide the capacity/tonnage of the chiller, we will recommend you the suitable pump in KW,which standard water pump is about 2 bar .If you need more high water pressure , please us when you inquiry.
9.5 Air cooled screw chiller generally uses one evaporators: just is shell and tube heat exchanger.
Shell and tube type evaporator, which requires an additional water buffer tank to connect.
9.6 Buffer Water Tank Capacity Choose
Buffer tank’s capacity can be customized according to specific needs. It can buffer a larger heat load, store more chilled water .
304 Stainless Steel Water Tank
10.Contact Us to Learn More About Our Low Temperature Air Cooled Glycol Chiller
Don’t delay in making the best decision for your manufacturing business and your future by increasing your production capabilities with low temperature glycol chillers. Contact us today for more information on a chiller.
Our probessional team will help you with any questions you have on our chiller units. We look forward to hearing from you!
alisa_chiller
+86 15320636029
mail
