Case Study – Energy Efficiency – Chilled Storage

To test the use of lower fan speeds in controlled atmosphere chilled stores for apples, three of the thirty nine new cold stores built at Geldermalsen Auction in the Netherlands had variable speed fans installed in a false ceiling rather than fixed speed fans installedover the door in a design incorporating a sloping roof. The [...]

Case Study Energy Efficiency -Liquid Pressure Amplification

A Norlake Walk-in-Freezer used for the storage of serum at the J Hillis Miller Health Centre, University of Florida, Gaineville,Florida had to maintain a temperature -30 ºC with a maximum temperature of – 20 ºC . The two chillers operating on R502 dump the extracted heat into the main chilled water circuit (8 ºC ). [...]

Case Study – Energy Efficiency – Free Cooling

A Finnish manufacturer of flexible packaging saved 37% of their annual energy consumption by purchasing a separate cooling system and production machine, rather than an integrated one. The production process requires heat to melt plastic granules but also needs alarge amount of cooling water at 10°C. By specifying separate production and cooling machines the cooling [...]

Case Study Retail Refrigeration – Electronic Expansion Valves

A Danfoss Smart case controller and electronic expansion valves were installed at Tops Market 22 in Niagara Falls, New York. The installation covered one low temperature (two stage) rack and one medium temperature rack connected to forty three display caseevaporators and five evaporators in a meat preparation room and walk-in meat boxes. R22 was used as the refrigerant in both racks.

Case Study Retail Refrigeration – LPA Liquid Pressure Amplification

A LPA® Liquid Pressure Amplifier was fitted to the high temperature rack of the Big Fresh Mt. Wellington store in New Zealand. The rack used four D4DA-1000 Copeland compressors and one 4DH-1500 giving a nominal capacity of 89.5 kW using R22 refrigerant. After installing the LPA the evaporator temperature rose by 6.4 ºC, indicating that flash vapour in the suction line had adverselyaffected the performance of the expansion valves. The measured energy saving was 32%.