Performance, (c) the amount of heat absorbed from the refrigerated space and (d) the On T-s diagram relative to saturation lines, determine (b) the coefficient of The refrigerant changes from saturated vapor to saturated liquid at 30 oC Calculate (a) the compressor and turbine power, in Btu/minДЄnswers: (a) 9993.44 btu/min 1679.28 btu/min, (b) 5.59ДЄ steady-flow Carnot refrigeration cycle uses refrigerant-134a as the working fluid. Refrigerant R-134a enters the condenserДЄs saturated vapor at 100 lbf/in 2 and leaves as saturated liquid at the For (a) R-12, (b) R-134a, (c) water, (d) R-22ДЄnd (e) ammonia as the working fluid, determine the operating pressures in the condenserДЄnd evaporator, in lbf/in 2, and the coefficient of performance.ДЄnswers: (a) 131.83 lbf/in 2 51.64 lbf/in 2 8.3, (b) 138.87 lbf/in 2 49.87 lbf/in 2 8.3, (c) 0.95 lbf/in 2 0.12 lbf/in 2 8.3 (d) 210.54 lbf/in 2 83.15 lbf/in 2 8.3 (e) 211.86 lbf/in 2 73.28 lbf/in 2 8.3ДЄ Carnot vapor refrigeration cycle is used to maintain a cold region at 0 oF What would the answer in part (a) be if the mass flow rate were 1 kg/min?ДЄnswers: (a) 9.70 kW, (b) 1.42 kW, (c) 6.83, (d) 2.43 kWДЄ Carnot vapor refrigeration cycle operates between thermal reservoirs at 40 oFДЄnd 100 oF. Passing through the evaporator, (b) the net power input to the cycle in kW and Determine (a) the rate of heat transfer to the refrigerant Saturated vapor enters the condenser atД¤0 oC, and saturated liquid exits at the same temperature. Refrigerant R-22 is the working fluid in a Carnot vapor refrigeration cycle for which theД®vaporator temperature is 0 oC. Refrigerant passing through the evaporator and (d) the coefficient of performance of the cycle? (e) What-if-scenario: The evaporator operates at a temperature of -5 oC.Дetermine, in kJ per kg of refrigerant flow, (a) the work input to theД¬ompressor, (b) the work developed by the turbine, (c) the heat transfer to the Refrigerant enters the condenser as saturated vapor at 30 oC and leaves as Finally, a comparison with other energy storage technologies highlights that the proposed CHS/P Carnot battery has an energy density of 280 Wh/l, which is one of the highest values in comparison with other energy storage technologies reported in Literature.Section-1: Basic and Modified Vapor Compression CyclesДЄ Carnot vapor refrigeration cycle uses R-134a as the working fluid. Mapping charts of rational efficiency for the dehydration and hydration reactions have been determined for the main combinations of reaction temperatures and condensation/evaporation temperatures: those can be a guide for future efficient design of Carnot batteries including CHS/P. The analysis of relative irreversibility of the systems shows that under the assumptions given in this work the major loss of exergy occurs when converting electricity into heat rather than transferring heat from the storage to the sCO 2. The exergy method was applied on both systems. It is also estimated that the total volume of storage required for the CHS/P is 66% smaller than in SHS system. It is demonstrated that the round-trip efficiency of the CHS/P can range from 37.4% to 41.7% when evaporation temperature of water for the heat output reaction of the chemical heat storage system is selected, respectively, as 80вЊ or 160вЊ, while the system comprising the SHS can reach a round-trip efficiency up to 40.3%. This Carnot Battery system is compared to the heat storage system comprising a two-tank molten salt sensible heat storage (SHS) in which the maximum temperature of salt storage is selected as 560вЊ. The re-conversion of heat of reaction into electricity is provided by a Brayton cycle, in which the working fluid is supercritical carbon dioxide (sCO 2). The reversible chemical reactions selected for heat storage/pump are the dehydration of calcium hydroxide and the hydration of calcium oxide. In this work, a novel Carnot battery system comprising a chemical heat storage/pump (CHS/P) and a Brayton cycle is presented.

Consider a carnot cycle heat pump