Heatcraft Refrigeration Products H-ENGM0806, H-ENGM0408 Hourly Heat Load, Load Calculation Forms

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6. Hourly Heat Load

The hourly heat load serves as the guide in selecting equipment. It is found by dividing the final BTU/24 hour load by the desired condensing unit run time.

35ºF. rooms with no timer

16 hr.

35ºF. rooms with timer

18 hr.

Blast coolers/Freezers with

 

positive defrost

18 hr.

Storage Freezers

18-20 hr.

25ºF. - 34ºF. coolers with hot gas

or electric defrost

20-22 hr.

50ºF. rooms and higher with coil

temperature above 32ºF.

20-22 hr.

7. Load Calculation Forms

To simplify the calculation and tabulation of refrigeration loads, there are two forms available:

Bulletin Above32-05 is used for all rooms above 32ºF. (0ºC.) Bulletin Below32-05 is used for all rooms below 32ºF. (0ºC.)

All data and tables necessary to fill in the Load Calculation Forms can be found in this manual.

A Word of Caution: The refrigeration load calculation methods presented in this manual are intended for use in selecting refrigeration equipment for rooms used for holding and sometimes pulling product temperature down. For process or unusual applications such as blast freezing or food processing situations, please contact our Application Engineering Department.

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Contents Engineering Manual Table of Contents ForwardTables Wall heat loads Insulated block K factorsOpenings and infiltration Job Survey Refrigeration Load CalculationsProduct Load Safety FactorAir Change Load Daily figureLoad Calculation Forms Temperature above 32ºF 20-22 hrHourly Heat Load 50ºF. rooms and higher with coilExample 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 Effective K Factor in Block Thickness of Insulation Appendix TablesWall Heat Loads Allowance for Sun EffectStorage VolumeFor long storage multiply the above values by Room 40ºF .4ºC 50ºF ºCStorage requirements and properties of perishable products Not based on maintaining nutritional valueMaple Sugar BTU / LB. / 24 Hrs Storage Temperature Degree F Product Heat of Respiration ApproxºF. Other Heat equivalent of electric motors Heat gain due to operation of battery operated lift truckBTU / 24 HR Heat equivalent of OccupancyRapid load selection for back bars Banana Ripening RoomBanana Rooms Refrigeration Requirements Refrigeration requirements for hardening ice creamDry Bulb Summer outside air and ground temperature design conditionsDesign Temp State CityRefrigeration Equipment Selection Temperature DifferenceProduct Safety/Capacity Control Equipment BalanceRecommended Air Changes/Hour Derating FactorsType of Operation/Air Flow Effects of Altitude on Air Cooled EquipmentGeneral Guidelines Unit Cooler Recommended Coil Replacement Left Large cooler or freezer RightLeft Cooler or freezer with glass display doors Right +30˚F Line SizingRecommended Line Sizes for R-134a 150 200 100Expansion Valve 21/8Recommended Line Sizes for R-22 Equivalent Lengths100 150 200 Receiver to 200 100Recommended Line Sizes for R-404A and R-507 Recommended Line Sizes for R-404A and R-507 30˚F 40˚FEquivalent Feet of Pipe Due to Valve and Fitting Friction Recommended Remote Condenser Line Sizes 134a R507 & R-404A Liquid Line NetRefrigerant Fahrenheit Celsius Fahrenheit Celsius Temperature Conversion ChartCelsius FahrenheitAir Coils Single Phase Loads Ohm’s Law for direct currentConversion Factors constant = WattsEnglish Conversion Factors & Data English to Metric Conversion FactorsSR/lb dry air Use of the Psychrometric ChartDefinitions 7000At other altitude Appendix ChartsAtmospheric Pressure Courtesy of Ashrae Reproduced by permissionCourtesy of Ashrae Reproduced by permission Glossary of Refrigeration Terms Btuh Load +35 Room +30 Room DimensionQuick Selection Guide FloorTips 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.
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