The Refrigeration Load - HVAC and Refrigeration Information Links
The Refrigeration Load - HVAC and Refrigeration Information Links
The Refrigeration Load - HVAC and Refrigeration Information Links
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Part 3THE REFRIGERATION LOADSection 12. HEAT TRANSMISSIONTransmission Heat <strong>Load</strong> — Q........................... 12-1<strong>The</strong>rmal Conductivity — k................................. 12-1<strong>The</strong>rmal Resistivity — r..................................... 12-1Conductance — C............................................. 12-1<strong>The</strong>rmal Resistance — R.................................. 12-1Surface File Resistance.................................... 12-1Overall Coefficient of Heat Transfer — U.......... 12-1Transmission Heat <strong>Load</strong>................................... 12-2Values of <strong>The</strong>rmal Conductivity forBuilding Materials...................................... 12-3Outdoor Design Data........................................ 12-3Allowance for Radiation from the Sun............... 12-8Recommended Insulation Thickness................ 12-8Quick Calculation Table for Walk-in Coolers..... 12-9Section 13. AIR INFILTRATIONAir Change Estimating Method......................... 13-1Air Velocity Estimating Method......................... 13-1Ventilating Air.................................................... 13-2Infiltration Heat <strong>Load</strong>......................................... 13-2Section 14. PRODUCT LOADTables of Specific Product Data........................ 14-1Heat of Respiration........................................... 14-1Sensible Heat Above Freezing.......................... 14-7Latent Heat of Freezing.................................... 14-8Sensible Heat Below Freezing.......................... 14-8Total Product <strong>Load</strong>............................................ 14-8Storage Data..................................................... 14-8Section 15. SUPPLEMENTARY LOADElectric Lights <strong>and</strong> Heaters............................... 15-1Electric Motors.................................................. 15-1Human Heat <strong>Load</strong>............................................. 15-1Total Supplementary <strong>Load</strong>................................ 15-1Section 16. EQUIPMENT SELECTIONHourly <strong>Load</strong>....................................................... 16-1Sample <strong>Load</strong> Calculation.................................. 16-1Relative Humidity <strong>and</strong> Evaporator TD............... 16-2Compressor Selection....................................... 16-2Component Balancing....................................... 16-3<strong>The</strong> Effect of Change in CompressorOnly on System Balance........................... 16-9Quick Select Tables for Walk-in Coolers........... 16-11© 1968 Emerson Climate Technologies, Inc.All rights reserved.
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