Heat exchangers in the refrigeration circuit Properties of different heat exchangers and their use in refrigeration; effect of superheating and supercooling Features - typical heat exchangers from refrigeration - different media: air / refrigerant, refrigerant / refrigerant and water / refrigerant - effect of superheating and supercooling of the refrigerant on the cyclic process Learning objectives/experiments - different heat exchangers and their use in refrigeration -- coaxial coil heat exchanger -- finned tube heat exchanger -- tubular heat exchanger -- plate heat exchanger - find out the correct installation position - determine energy fluxes - effect of superheating and supercooling of the refrigerant on the cyclic process - design of a compression refrigeration system - representation of the cyclic process in the log p-h diagram Specification [1] refrigeration system with 4 different heat exchangers: coaxial coil heat exchanger, finned tube heat exchanger, tubular heat exchanger, plate heat exchanger [2] combinations of different media: water / refrigerant, refrigerant / refrigerant, air / refrigerant [3] water circuit with tank and pump to cool the condenser and heat the evaporator [4] superheater can be disabled via bypass [5] flow meter and thermometer in the water circuit to determine the exchanged energy fluxes [6] flow meter for measuring the refrigerant flow [7] thermometers at all relevant points [8] refrigerant R513A, GWP: 631 Technical data Compressor - refrigeration capacity: 1308W at 7,2/54,4°C - power consumption: 514W at 7,2/54,4°C Receiver - 1,3L Refrigerant - R513A - GWP: 631 - filling volume: 1,3kg - CO2-equivalent: 0,8t Measuring ranges - pressure: -1...9bar / -1...24bar - temperature: 12x -5...105°C, 1x 0...60°C - flow rate: 2x 20...250L/h (water) - flow rate: 1x 2...29L/h (refrigerant) 230V, 50Hz, 1 phase 230V, 60Hz, 1 phase; 120V, 60Hz, 1 phase UL/CSA optional LxWxH: 1900x800x1900mm Weight: approx. 255kg