Heatcraft Refrigeration Products H-ENGM0408, H-ENGM0806 manual Example -10ºF Beef Freezer

Page 11

Refrigeration Load Estimate Form

(for rooms below 32ºF) Bulletin Below32-05

Estimate for:

Estimate by:

Date:

Example: -10ºF Beef Freezer

Basis for Estimate

Room Dimensions: Width

20

Volume: (L) 24

Ambient Temp 90

 

24

12

 

ft.

 

ft. x Length

ft. x Height

x (W)20

12x (H)

5760

=

 

cu. ft.

ºF. (Corrected for sun load) — Room-10

Temp.

100

ºF. =

Note: Tables can be found in Engineering Manual, H-ENG-2

ºF. T.D.

 

 

Insulation

 

Inches

Type

Ceiling

4

Foamed In place Ure

Walls

4

Foamed In place Ure

Floor

4

Foamed In place Ure

Product Load

 

 

 

 

 

(a)

3000

lbs./dayBeefof

to be reduced from entering temp35. of

ºF.

to freezing point of28

ºF. (Table7 7) =

ºF. Initial temp. drop

 

 

and then reduced from freezing point to storage Temp. of

-10

ºF. = (Table 7)

38

ºF. Final temp. drop.

(b)

—

gallons of ice cream— @

overrun

 

 

 

Miscellaneous

Motors (including all blower motors)0.5 Lights (assume 1 watt/sq.ft.) 480 No. of People 0

HP

60

 

 

Ground Temp.

(Table 21)

Watts

 

 

1. Transmission Loads

 

 

 

 

 

 

Ceiling: (L)24

x20(W)

x Heat72

Load

(Table 1)

34560

=

North Wall: (L)24

x12(H)

x Heat72

Load

(Table 1)

20736

=

 

24

12

72

 

 

20736

 

South Wall: (L)

x (H)

x Heat Load

(Table 1)

17280

=

East Wall:

20

x12(H)

x Heat72

Load

(Table 1)

=

(W)

12

72

 

 

17280

 

 

20

 

 

 

West Wall: (W)

x (H)

x Heat Load

(Table 1)

24000

=

 

24

20

50

 

 

 

Floor: (L)

x (W)

x Heat Load

(Table 1)

 

=

2. Air Change Load

 

 

 

 

 

 

 

Volume:5760

 

cu. 5ft..2x

Factor 3(Table.56 5) x

Factor (Table 6) 106629

=

3.Additional Loads Electrical Motors:0.5 Electrical Lights:480 People Load: 0 Glass Door Load:0

HP x 75000 BTU/HP/24 hr. Watts x 82

People— xBTU/24 hrs. (Table 12) Doors x 31200 BTU/Door/24 hr.

37500 =

39360 =

—=

—=

4. Product Load: (Table 7) (Product Load Figured @ 24 hr. Pulldown*)

ºF. Intial16170Temp. Drop

 

(a)

3000

lbs./day0.x77

Spec. Heat above 7freezing x

=

 

3000

lbs./day100x

Latent Heat Fusion

300000

=

 

3000

lbs./day0x.4

Spec. Heat below38freezing x

ºF. Intial45600Temp. Drop

=

(b)

gallons of ice cream/day— x

BTU/galX 2.4(Table(10 hr19). Pull down)*

—

=

*For product pulldown time other than 24 hrs. figure 24 hr. load x (24/Pulldown Time)

 

 

 

 

 

 

Total Refrigeration Load (1+2+3+4+5) BTU/24 hrs.

 

 

679851

 

Add 10% Safety Factor

 

 

67985

 

Total with Safety/Factor BTU/24 hrs.

 

 

747836

 

 

 

Divide by No. of Operating Hrs. (18) to obtain BTUH Cooling Requirement

 

41546

 

 

 

 

 

 

 

Equipment Selection

 

Condensing Unit

 

Unit Cooler

System Capacity

Qty.

Model No.

Qty.

Model No.

BTU/hr.

2175 West Park Place Blvd. • Stone Mountain, GA 30087 • 770.465.5600 • Fax: 770.465.5990 • www.heatcraftrpd.com

11

Page 10 Page 12
Image 11
Page 10 Page 12
Contents Engineering Manual Forward Table of ContentsOpenings and infiltration TablesWall heat loads Insulated block K factors Refrigeration Load Calculations Job SurveyDaily figure Safety FactorAir Change Load Product Load50ºF. rooms and higher with coil Temperature above 32ºF 20-22 hrHourly Heat Load Load Calculation FormsExample 35ºF Convenience Store Cooler With Glass Doors Example 35ºF Beef Cooler Inches Type Ceiling Walls Floor Example -20ºF Ice Cream Hardening Freezer Example -10ºF Beef Freezer Gallons of ice cream @ Overrun Allowance for Sun Effect Appendix TablesWall Heat Loads Effective K Factor in Block Thickness of InsulationRoom 40ºF .4ºC 50ºF ºC VolumeFor long storage multiply the above values by StorageNot based on maintaining nutritional value Storage requirements and properties of perishable productsMaple Sugar ºF. Other BTU / LB. / 24 Hrs Storage Temperature Degree F ProductHeat of Respiration Approx Heat equivalent of Occupancy Heat gain due to operation of battery operated lift truckBTU / 24 HR Heat equivalent of electric motorsRefrigeration requirements for hardening ice cream Banana Ripening RoomBanana Rooms Refrigeration Requirements Rapid load selection for back barsTemp State City Summer outside air and ground temperature design conditionsDesign Dry BulbEquipment Balance Temperature DifferenceProduct Safety/Capacity Control Refrigeration Equipment SelectionEffects of Altitude on Air Cooled Equipment Derating FactorsType of Operation/Air Flow Recommended Air Changes/HourGeneral Guidelines Left Cooler or freezer with glass display doors Right Unit Cooler Recommended Coil ReplacementLeft Large cooler or freezer Right 150 200 100 Line SizingRecommended Line Sizes for R-134a +30˚F21/8 Expansion Valve100 150 200 Recommended Line Sizes for R-22Equivalent Lengths 200 100 Receiver toRecommended Line Sizes for R-404A and R-507 30˚F 40˚F Recommended Line Sizes for R-404A and R-507Equivalent Feet of Pipe Due to Valve and Fitting Friction 134a R507 & R-404A Liquid Line Net Recommended Remote Condenser Line SizesRefrigerant Fahrenheit Fahrenheit Celsius Temperature Conversion ChartCelsius Fahrenheit Celsius= Watts Single Phase Loads Ohm’s Law for direct currentConversion Factors constant Air CoilsEnglish to Metric Conversion Factors English Conversion Factors & Data7000 Use of the Psychrometric ChartDefinitions SR/lb dry airCourtesy of Ashrae Reproduced by permission Appendix ChartsAtmospheric Pressure At other altitudeCourtesy of Ashrae Reproduced by permission Glossary of Refrigeration Terms Floor DimensionQuick Selection Guide Btuh Load +35 Room +30 RoomTips for Quick Selection Guide Rapid Load Calculator for Large Coolers and Freezers Heatcraft Refrigeration Products LLC

H-ENGM0408, H-ENGM0806 specifications

Heatcraft Refrigeration Products offers a diverse range of commercial refrigeration solutions designed to meet various operational needs. Among their notable offerings are the H-ENGM0806 and H-ENGM0408 models, which stand out for their efficiency and innovative features.

The H-ENGM0806 model boasts a robust construction and high-performance capabilities, making it ideal for large-scale refrigeration requirements. This model is engineered with an advanced compressor that provides powerful cooling while maintaining energy efficiency. The unit operates at low sound levels, making it suitable for environments where noise reduction is essential, such as restaurants and grocery stores. Additionally, the H-ENGM0806 incorporates a reliable fan system designed to ensure optimal air circulation, promoting even cooling throughout the refrigerated space.

Meanwhile, the H-ENGM0408 model is designed for medium-sized applications that require flexibility without compromising on performance. This unit features a compact design, making it an excellent choice for businesses with limited space. Its energy-efficient compressor reduces operational costs, and its user-friendly digital controls allow for easy temperature adjustments and monitoring. The H-ENGM0408 is engineered to operate in various ambient conditions, ensuring reliability and consistent performance regardless of the environment.

Both models feature a state-of-the-art microprocessor control system that allows for precise temperature management. These systems not only optimize performance but also enhance the longevity of the refrigeration units. The H-ENGM0806 and H-ENGM0408 come with a robust evaporator coil design, facilitating rapid cooling and reducing the downtime associated with equipment maintenance.

In terms of durability, both products are constructed with high-quality materials resistant to corrosion and wear, making them suitable for demanding commercial environments. Additionally, they comply with industry standards and regulations, ensuring safety and reliability in operation.

In conclusion, Heatcraft's H-ENGM0806 and H-ENGM0408 models combine efficiency, flexibility, and advanced technology to provide reliable refrigeration solutions. Their thoughtful design and robust features make them ideal choices for businesses looking to maintain optimal temperature control while minimizing energy consumption and operational costs.
Top Page Image Contents