Browsing OSU - Electronic Theses and Dissertations by Author "Bach, Christian K."
Now showing items 1-9 of 9
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Design and construction of a pumped refrigerant loop for commercial scale low-GWP refrigerant heat exchanger testing
Chowdhury, A. B. M. Imran (2021-07)A pumped refrigerant loop for refrigerant conditioning is developed to allow testing of heat exchangers using a wide range of refrigerants, including low global warming potential refrigerants. The pumped refrigerant loop ... -
Design, simulation, and construction of a hot-gas bypass chiller for a commercial scale psychrometric coil testing facility
Makhani, Khurram K. (2020-12)In recent years, there has been a large effort from industry and researchers to improve the efficiency of HVAC&R systems. At Oklahoma State University (OSU), the Building & Environmental Systems Research Group (BETSRG) has ... -
Development and commissioning of a variable capacity experimental infrastructure for a novel three fluid heat exchanger
Istaque, Farhan (2023-05)One of the major problems with using renewable energy is the mismatch between power generation and demand as renewable energy generation and energy usage from HVAC equipment depend on unsynchronized natural factors. To ... -
Development and validation of a reduced order fin-and-tube heat exchanger model
Sarfraz, Omer (2020-05)Vapor compression systems are the most widely used cooling system type in heating, ventilation, and air-conditioning (HVAC) applications. Two of the four basic components of a vapor compression system are heat exchangers, ... -
Development of computer programs for fast computation of g-functions and automated ground heat exchanger design
Cook, Jonathan Christopher (2021-12)Ground-source heat pump systems utilizing vertical borehole ground heat exchangers are energy efficient. The most accurate method for sizing the boreholes is based on simulations which make use of superposition of a unit-step ... -
Development of recommendations for air mixer and sampler design and combinations thereof for performance testing of HVAC equipment
Park, Hyunjin (2023-05)Advances in equipment performance, and the development of variable speed equipment have led to stricter performance testing of HVAC&R equipment, requiring limited tolerances on capacity and efficiency measurements to 5% ... -
Enhanced Vertical Ground Heat Exchanger Model for Whole Building Energy Simulation
Mitchell, Matt Sandy (2019-07)The U.S. Energy Information Agency estimates that buildings consume more than 40% of all energy used in the United States. This includes considering energy used for transportation and heavy industry. As a result, many ... -
Experimentally validated heat exchanger refrigerant charge model and optimization of refrigerant charge for a heat pump
Lee, Abraham Juseok (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. ... -
Predicting and testing the performance of next generation heat exchangers with low-GWP refrigerants
Saleem, Saad (2021-12)Energy efficiency regulations are forcing air conditioning (AC) and heat pump (HP) manufacturers to replace existing high global warming potential (GWP) refrigerants in their systems with more climate friendly alternatives. ...