Accession Number : AD0431732


Title :   PRELIMINARY STUDIES OF AIR CURTAINS FOR REFRIGERATED WAREHOUSES,


Corporate Author : NAVAL CIVIL ENGINEERING LAB PORT HUENEME CALIF


Personal Author(s) : Herndon,C L


Report Date : 24 Jan 1964


Pagination or Media Count : 21


Abstract : The opening and closing of heavy doors wastes considerable time in refrigerated warehouses which have a large movement of food products. Open doors also cause refrigeration loss which may in turn cause spoilage. In an attempt to prevent refrigeration loss and still allow the door to remain open, a relatively high velocity stream of air, called an air curtain, is directed across the entrance. To evaluate the usefulness of air curtains a literature search was made, a file of literature from air curtain manufacturers was compiled and several installations in various parts of the country were visited. A study of existing installations indicate the air curtains can be effectively used in most refrigerated warehouses. Installations at Naval Supply Depots have been ineffective at times because visibility at the entrance was reduced by fog. This fog is caused by cold inside air mixing with warm moist outside air. As each installation has different problems and manufactures do not agree on design and operation criteria, it seems desirable to make tests where installation and operation may be closely supervised. From such a study, design and operation criteria could be prepared and the economic advantages of air curtains determined. (Author)


Descriptors :   *COOLING AND VENTILATING EQUIPMENT , WAREHOUSES , REFRIGERATION SYSTEMS , AIR , THERMAL INSULATION , BLOWERS , PHOTOGRAPHS , ENGINEERING DRAWINGS , FOG , TEMPERATURE , GAS FLOW


Distribution Statement : APPROVED FOR PUBLIC RELEASE