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Performance and Capacity Comparison of Two New Lgwp Refrigerants Alternative to R410a in Residential Air Conditioning Applications
(Oklahoma State University, 2012-12-01)
This thesis presents a ground breaking study on Low Global Warming Potential (LGWP) developmental refrigerants. An R410A 17.6 kW (5 ton) heat pump split unit commercially available off-the-shelf for US ducted HVAC applications, ...
Modeling of vertical ground loop heat exchangers for ground source heat pump systems
(1999-12)
The ability to predict both the long-term and short-term behavior of ground loop
heat exchangers is critical to the design and energy analysis of ground source heat pump
systems. For detailed analysis and accurate ...
Experimentally validated heat exchanger refrigerant charge model and optimization of refrigerant charge for a heat pump
(2023-05)
Refrigerant charge affects the efficiency, capacity, and reliability of a heat pump, and incorrect charge can lead to increased energy consumption and decreased performance as well as potential damage to the system. ...
Experimental and theoretical investigation of effect of fin geometry on frost formation on microchannel heat exchangers
(2012-07)
Scope and Method of Study:
Calibration of the OSU Psychrometric Chamber and First Experiments
(Oklahoma State University, 2011-07-01)
Complete the construction of a new psychrometric chamber at OSU and demonstrate that the chamber is capable of performing accurate and precise experiments on thermal systems with and without a live thermal load. Completion ...
Study of frost growth on heat exchangers used as outdoor coils in air source heat pump systems
(2011-05)
Scope and Method of Study: During winter heating operation, the outdoor coil of a heat pump acts as an evaporator and when the ambient temperature is near freezing, the moisture in the atmospheric air freezes on the coil ...
Study of Low Global Warming Potential Refrigerants in Heat Pump System for Residential Applications
(Oklahoma State University, 2012-12-01)
R410A is one of the major refrigerants used for air conditioning and heat pump systems in residential applications. It has zero ODP but its GWP is about 2,000. In China and Japan, refrigerant R32 (GWP = 675, zero ODP) has ...
Experimental Investigations and Design Tool Development for Surface Water Heat Pump Systems
(Oklahoma State University, 2014-05-01)
This study reports on experiments which were performed on spiral-helical surface water heat exchangers. These heat exchangers, when used as part of a geothermal heat pump system, serve as an alternative means whereby the ...