Applicable design of multi-functional cascade heat pump system for an office building

When the cascade heat pump system is applied as a multi-functional that can be used not only for hot water supply but also air-conditioning of buildings, low-stage cycle responsible indoor heating and cooling thermal load, high-stage by raising refrigerant temperature. Unlike existing designed with one operation mode supply, should considered various parameters. This study was proposed design sequence building application, energy-saving performance compared parallel air-conditioning. The office set study, load calculated in TRNSYS program. systems were using thermodynamic equation model built into EnergyPlus. As result, affected outdoor air source. 25% to simultaneous use system.