Chillers are refrigeration. Are responsible for producing the cold

The heat from the refrigerant or (refrigerant) is compressed or pressurized by a state vapor and absorption refrigeration cycle in the water and cooling from the cooling circuit or. the cooling system for use in refrigeration or air conditioning.

This type of chillers in the industry.

Most air chillers are divided into two major categories.

1. cooled water (water cool chiller).

Cooling systems, chillers. Fashion on the cooled water (water cool) water is used as an intermediary in the exchange of heat between the cooling of the condenser chillers and heat it to a cooling tower. By using a fan to reduce the temperature of the water to cold water and sent cooling assembly (Condenser) again.

2. The cooled air (air cool chiller).

The cooling system of the chillers. The use of the cooled air air cool air as intermediaries in the exchange of heat between the heat sink of Schiller’s coil condenser or another name familiar to the condensing using a fan. the cooling off of honeycomb panels to reduce the temperature of the coil. Most of the temperature difference between in and out of the coil is different about 10 degrees F Farrell. Temperature and out may not meet the foregoing. Depending on the design of the cooling system and the climate at that time.

 

Application of Schiller. In the industry, Air Chiller It is very useful in industrial applications. In addition to the water cooler for use in air conditioning and large. Also used for cooling of the product. Cooling equipment Many types of cooling equipment Most often used in the manufacture of plastics. Injection and blow molding, metal Tire Industry Industrial buildings, hospitals, shopping malls. Hotels and universities

 

Chillers for industrial applications (Industrial chiller).

Schiller is a machine designed to meet the needs cooling. There are many types of industrial applications Or a rule of thumb is designed to suit the conditions in the plant. Schiller Industrial (Industrial chiller) is often smaller Tucker Band applications can take many forms. movable The size and the ability to make cold usually starts at 0.5-30 RT based on the needs of the machine, but it kind. The Industrial chiller industrial chillers are different from the chillers used in large refrigeration systems. The system will start, but 10 RT to hundreds or thousands of RT.

 

Refrigerant

Category and type of refrigerant. The system used in chillers.

Types of refrigerants are as follows.

R12

R123

R134a

R22

R290 (propane).

R32

R401a

R404A

R407a

R407C

R408a

R409a

R410A

R500

R502

R600a

R744 (CO2), carbon dioxide

R717 (ammonia)

R718 (H2O) (a) Mainly used in the absorption chiller.

Refrigerants used in chillers are mainly R12 R123 R134a R22 R410A R407C R502 R717 R744 but will be reduced to a few species due to the cancellation of the refrigerant itself. Regulatory using refrigerant to reduce global warming.

 

Chillers or large cooler. Most of the cooling of the condenser (Condenser) with water and hot water from the condenser (Condenser) is cooled by. Cooling tower (cooling tower) submitted again to the cooling of the condenser (Condenser) again, and this work continued to circle until it shuts down or stop working.

Chiller or cooler large. The cooling of E. Poe’s operator (evaporator).

The cooling water cooling kit. Event Zeppo operator (evaporator) water flowing through the series. Event Zeppo operator (evaporator) is water-cooled.

It was used to reduce the temperature of the load or be sent into the air AHU, FCU for air conditioning in buildings.

Type Compressors (compressor) used in chillers.

Compressor (Compressor) is the heart of the cooling system. Which is responsible Adding pressure to the refrigerant (Refrigerant) and forward refrigerant sucked into the cooling circuit.

Classified according to the nature of Compressors below.

1. Piston (Reciprocating Compressor).

   

2. Rotary (Rotary Compressor).

   

3. Screw (Screw Compressor).

   

4. Scroll  (Scroll Compressor).

   

5. Centrifugal  (Centrifugal Compressor).

   

6. High-performance centrifugal impeller or (Magnetic Bearing Compressor).

   

The operation of the compressor (Compressor) types.

1. Piston (Reciprocating Compressor).
2. Piston (Reciprocating Compressor).

The application will slip up – perfect piston. Acting in a vacuum and compressed refrigerant (Refrigerant).

2. Rotary (Rotary Compressor).

It uses a set of rotating the rotary crank away in the center. Acting in a vacuum and compressed refrigerant (Refrigerant).

3. Screw (Screw Compressor).

It will use the moon’s core set of screw drivers in rolled together. Acting in a vacuum and compressed refrigerant (Refrigerant).

4 .. A Cole (Scroll Compressor).

Is similar to the Rotary (Rotary Compressor) and screw (Screw Compressor) by taking advantage of the second series was developed as a model Scholes (Scroll Compressor) is used to rotate the crank retreat center and a core driver 2. of Scholes (Scooll Compressor) rolled in together. Acting in a vacuum and compressed refrigerant (Refrigerant).

5. fins or Nautilus (Centrifugal Compressor).

It uses a set of rotating blades. Similar vane pumps. Acting in a vacuum and compressed refrigerant (Refrigerant).

6. High-performance centrifugal impeller or (Magnetic Bearing Compressor).

It uses a set of rotating blades. Similar vane pumps. Acting in a vacuum and compressed refrigerant (Refrigerant) will look good and stand out. A propeller or centrifugal (Centrifugal Compressor) is a low power consumption. Control and reduce the speeds around. Do not use lubricant in the cooling system (because no bearing on the series), the high efficiency and energy saving.

VSD system Chiller

VSD is applied in the first compressor chillers. Centrifugal in late 1970 and has become the norm of the cost. And the reduction of energy consumption now VSD is applied to the rotary (Rotary Compressor) Screw (Screw Compressor) and Scholes (Scroll Compressor) with fins or Nautilus (Centrifugal Compressor) and was developed as a model. Centrifugal Compressors propeller or performance (Magnetic Bearing Compressor).

In the year 2004 the Danfoss Compressors has produced a high-performance centrifugal impeller or (Magnetic Bearing Compressor) was first marketed. The application of variable speed drives (VSD) combined to make a series of Magnetic Bearing. Compressors Performance (Magnetic Bearing Compressor) up and increase the efficiency of vapor compression chillers. Using technology A wizard to create a place on this type of circuit. By Compressors of this kind do not require oil cooling. Because there is no set of bearings Compressors. As a result, heat transfer and cooling efficiency. Because there is no oil in the insulation. Low power consumption Control and reduce the speeds around. The starting point is very low electricity consumption. It is a high performance and energy efficiency and reduce energy consumption. The air conditioning system is tremendous.

C.O.P. in the air conditioning and refrigeration systems is.

C.O.P from the word COEFFICIENT OF PERFORMANCE.

C.O.P. the performance of the chiller.

One refers to the amount of cooling that can be achieved. Compared with the energy actually used. In the operation of the compressor Cooling energy is the high cost C.O.P. C.O.P vary. Working conditions of air chillers Chiller.

Is there a way to calculate

COP = Cooling power / Power input.

Has the C.O.P. out

For example

20,472 BTU air conditioner is.

C.O.P. = COOLING CAPACITY 6 KW / POWER INPUT 1.85 KW.

Instead of the 6 / 1.85 to C.O.P. = 3.24.

But if you are looking for value, multiply by 3.412 E.E.R because 1 WATT = 3.412 BTU.

Finding the EER

EER stands for energy efficiency rating is the ratio of a BTU to Watts.

Formula EER = Output / Input (Btu / hr) / Watt.

Another recipe COP = EER / 3.142.

When we have the C.O.P. we already have for the EER.

formula

COP = EER / 3.142 instead of 3.24 = EER / 3.142.

will get

EER = COP x 3.412

EER = 3.24 x 3.412

EER = 11.05

a sample

C.O.P. = 3.24 E.E.R are looking up.

C.O.P. x 3.412 = EER value of 3.24 x 3.412 = 11.05.

EER 11.05, which will set the standards for air conditioning No. 5 in 2007, it must be EER. In fact, at least up to 11.0 EER COP is enough.

How to find Kw./ton RT (USRT) or Kw./RT of Schiller.

First, evaluate the amount of heat transfer in one hour.

It has the formula for the amount of heat flow is measured in kcal / hr below.

Formula Q = R x 1,000 x △ T x C.

Q = amount of heat, kcal / hr.

R = the amount of water flowing through the Evaporator unit is m3 / hr.

△ T = the temperature difference through – out C Evaporator Chelsea euthanasia.

C = specific heat of water is measured in kcal / kg ° Chelsea euthanasia.

(0.998 kcal / kg ° Chelsea euthanasia at 40 ° Chelsea euthanasia).

~ 1 kcal / kg ° Chelsea euthanasia.

Chiller sample size of 500 tons RT (USRT).

Formula Q = R x 1,000 x △ T x C.

Room for the R, △ T, C to complete before starting the calculation, then returns Q.

Step one for the R.

From measurements of the venue R value is 300 m3 / hr (R = 300 m3 / hr).

Step 2 for the △ T.

Evaporator 12 degrees water temperature in Manchester Center.

Evaporator 7 degrees water temperature leaving Chelsea euthanasia.

From the front of the △ T measurement is 5 degrees, Chelsea Center (△ T = 5).

Step 3 for the C.

C = specific heat of water is measured in kcal / kg ° Chelsea euthanasia.

And C is approximately 1 kcal / hr.

Then, instead of the formula.

R = 300

△ T = 5

C = 1

Q = R x 1,000 x △ T x C represents a Q = 300 x 1,000 x 5 x 1.

Q = 1,500,000 kcal / hr

 

Then, the Q value was converted to BTU is a unit ton (USRT).

The source follows:

1 ton of cooling (Refrigerator ton, RT) (USRT).

1 USRT = 3,024 kcal / hr = 12,000 Btu.

Calculated from a 1 ton = 2,000 lb.

The amount of water is 2,000 lb (0 ° Chelsea euthanasia).

Ice makes 2,000 lb (0 ° Chelsea Center) was dissolved in 24 Hr.

The latent heat = 144 BTU / lb.

1 USRT = (2,000×144) / 24 = 12,000 Btu.

1 USRT = 3,024 kcal

1 Btu = 0.252 kcal

12,000 Btu = 3,024 kcal

 

So is represented as follows:

RT (USRT) = Q / 3,024 kcal.

Q = the amount of heat transferred in one hour = 1,500,000 RT (USRT) / 3,024 kcal = 496.03 RT.

Then, when the ability of Schiller then.

To find the energy used in cooling the chillers the denominator is the result of kw / RT.

Air chillers of 500 tons RT (USRT), the author of this example is to use the power of 285 kw.

Therefore kw / RT is the chiller 500 RT.

285 / 496.03 = 0.57 kw / RT.

 

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