Optimum design for thermoelectric in a sub-cooled trans-critical CO 2 heat pump for data center cooling

摘要: We present an analysis and optimization of a thermoelectric (TE) assisted air-cooling vapor compression (VC) cycle heat pump chiller for datacenter cooling. The technology provides enhancement cooling performance trans-critical R744 (CO2) VC cycle, especially in hot climates that have air temperatures more than 30 °C, which exceeds the critical point refrigerant. Absorbing larger enthalpy from evaporator by subcooling with TE, cycle's capacity is enhanced. While TE works effectively small temperature difference, system coefficient-of-performance (COP) significantly enhanced at lower pressure operation condition particular. Hence, this approach could provide reduction while maintaining COP. At optimum cooler design operating conditions, 12-13% improvement maximum expected currently available material on market (ZT~1.5). Since power consumption due to low pumping required, COP also gains. cost subcooler considered. System energy calculated based example data center mathematically high computation Purdue University.