Refrigerated railroad cars, known as reefers, are railroad rolling stock designed to carryrnperishable freight at specific temperatures. They are insulated boxcars that keep the cargo at arnregulated temperature. As soon as railway bulk freight transportation has emerged and railroadrncars had the capability to keep a load cold, the potential growth of the meat, vegetables, fruitsrnand brewery industries became nearly unlimited. In this thesis, a current technology andrnachievement of a cold-room system on transportation system especially in a railroad car wasrninvestigated. A refrigerated railroad car with electric powered integrated R134A vaporrncompression refrigeration system needs to be designed for local manufacturing. The refrigeratedrnrailroad car with internal dimensions (17.72 * 2.66 * 2.52) has to be able to preserve andrntransport a maximum charge of 60000kg of chilled/frozen meat or 42000 kg of chilled vegetablesrnin 24 hours (1 day) to the next mode of transportation, sea transport to Middle East Market. Thernmeat to be frozen and transported enters the refrigerated rail car already frozen to arntemperature of about -10Â°C. Also the meat and vegetables to be chilled and transported entersrnthe car at a temperature of about 2Â°C and 3Â°C respectively. The frozen meat leaves thernrefrigerated railcar and transferred to the refrigerated ship or reefer container at -18Â°C.rnA pre-fabricated outer facing with an injected polyurethane is used as an insulation system forrnthe car envelop design and the thermal heat resistance of walls, ceiling and floor is calculatedrnwith standard wall thickness. In this design of car envelop the refrigerating space and airrncirculation is determined for obtaining the optimum air velocity inside the refrigerated railcar.rnIn these design work we use condensing temperature 48Â°C. Average summertime temperature ofrnAYSHA is 38Â°C, so there is an average margin of 10Â°C. For our design purpose we will assumernan ambient temperature of 40Â°C. With these parameters we made cooling load calculationsrnanalytically and using computer program and the total cooling load is found to be approximatelyrn19 kW. We use this amount refrigeration capacity for the design process like system componentrnselection and sizing. And finally using the refrigerated railcar envelope and selectedrnrefrigerating equipment the most appropriate system configuration has been made.