Investigation of a high-temperature combination heat pump for lower-cost electrification in multifamily buildings

被引:1
作者
Kim, Junyoung [1 ]
James, Nelson [1 ]
Maguire, Jeff [1 ]
机构
[1] Natl Renewable Energy Lab, Denver West Pkwy, Golden, CO 80401 USA
关键词
High-temperature heat pump; Combination heat pump; Modeling; Multifamily building; Electrification; AIR-CONDITIONING SYSTEMS; VAPOR INJECTION; SCROLL COMPRESSOR; LIQUID INJECTION; MOVING-BOUNDARY; PRESSURE-DROP; R32; PERFORMANCE; CONDENSATION; FLUID;
D O I
10.1016/j.apenergy.2024.124225
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
The development of space and water heating combination heat pumps capable of generating water temperatures high enough for convective heat emitters will enable more cost-effective and equitable decarbonization solutions for electrifying multifamily buildings. In this paper, multifamily building models and a charge- sensitive mechanistic cycle model of a combination heat pump are developed, and the system performance is predicted based on the models. Unlike other state-of-the-art residential heat pumping equipment, the modeled combination heat pump using an economized, fluid-injected variable-speed compressor can achieve higher temperature lifts of 40 degrees degrees - 85 degrees C, degrees C, with lower installation costs and complexity. The model predicted heating coefficient of performance (COPh) h ) is 2.1 at an ambient temperature of -15 degrees C degrees C with a high-temperature lift of nearly 85 degrees C, degrees C, and a seasonal coefficient of performance in heating mode (SCOPh) h ) ranges from 2 - 4 for different locations. The system shows 30% - 90% lower CO2eq 2 eq emissions over a condensing gas boiler and 9% - 13% lower projected installation costs than two separate space and water heat pumping appliances.
引用
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页数:24
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