Cooling-load density optimization for a regenerated air refrigerator

Influence of multi-irreversibilities on the performance of a Brayton refrigeration cycle working with an ideal Bose or Fermi gas

“…Using the Brayton refrigeration cycle model established here and the analysis method in Refs. [15,[23][24][25][26][27]36,37], one can further discuss the performance of an irreversible regenerative Brayton refrigeration cycle working with the quantum gases.…”

“…According to Fig. 1, one may introduce the compression and expansion efficiencies [16][17][18][19][20][21][22][23][24][25][26][27] …”

Exergetic efficiency optimization for an irreversible Brayton refrigeration cycle

“…Luo et al [21] optimized cooling load and COP performance of irreversible simple Brayton refrigeration cycle coupled to constant-temperature heat reservoirs. Zhou et al analyzed and optimized cooling load density of the endoreversible simple Brayton refrigeration cycles coupled to constant- [22] and variable- [23] temperature heat reservoirs, of the irreversible simple Brayton refrigeration cycle coupled to constant- [24] and variable- [25] temperature heat reservoirs, and of irreversible regenerated Brayton refrigeration cycles coupled to constant- [26] and variable- [27] temperature heat reservoirs. The cooling load density was defined as the ratio of cooling load to the maximum specific volume in the cycle.…”

Cooling load and coefficient of performance optimizations for real air-refrigerators

“…Recently, some progress in the research and development of air (Brayton) refrigeration cycles has been achieved [6][7][8][9]. The method of finite time thermodynamic analysis has been also applied to the performance studies of simple endoreversible [10][11][12] and irreversible [13][14][15][16][17] Brayton refrigeration cycles, as well as regenerated endoreversible [18] and irreversible [19][20][21] Brayton refrigeration cycles. For a fixed total heat-exchanger inventory of heat exchangers (i.e., the sum of heat conductances of the all heat exchangers) in the refrigeration cycle, the optimum performance of the cycle can be obtained by optimizing the distribution of the heat exchanger inventory between the hot-and cold-side heat-exchangers [10,[20][21][22][23][24][25].…”

“…The method of finite time thermodynamic analysis has been also applied to the performance studies of simple endoreversible [10][11][12] and irreversible [13][14][15][16][17] Brayton refrigeration cycles, as well as regenerated endoreversible [18] and irreversible [19][20][21] Brayton refrigeration cycles. For a fixed total heat-exchanger inventory of heat exchangers (i.e., the sum of heat conductances of the all heat exchangers) in the refrigeration cycle, the optimum performance of the cycle can be obtained by optimizing the distribution of the heat exchanger inventory between the hot-and cold-side heat-exchangers [10,[20][21][22][23][24][25]. Wu et al [10] studied the optimum allocation of heat-exchanger inventory, the optimum thermalNomenclature C thermal-capacity rate, kW/K c thermal-capacity rate matching, dimensionless E 1 effectiveness of heat exchanger, dimensionless k ratio of principal specific heats, dimensionless m (k À 1)/k, dimensionless N 1 number of heat-transfer units, dimensionless Q rate of heat transfer, kW R cooling load, kW T temperature, K U heat conductance, kW/K u distribution of heat conductances, dimensionless x isentropic temperature ratio of working fluid, dimensionless…”