An ideal vapor-compression refrigeration system operates at steady state with refrigerant r134a. the evaporator temperature is-12 °c and condenser pressure is 9 bar. saturated vapor enters the compressor and saturated liquid exits the condenser. the mass flowrate is 3 kg/min. calculate: a) coefficient of performance compressor power, kw refrigeration capacity, in tons of refrigeration

Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.

Items are similar to the free issue items, but their access is limited. (clo5) a)-bin stock items free issue b)-bin stock controlled issue c)-critical or insurance spares d)-rebuildable spares e)-consumables

Plot schematically the tensile stress versus strain curves for a typical thermoplastic material at a temperature below its glass transition temperature (tg and at a temperature above its tg, respectively. do the same for a typical thermosetting material. list in a table any differences or similarities between the two materials at t> tg and t < tg, respectively, and relate them to the structures of the two types of polymers