Development of high efficiency window air conditioner using propane under limited charge
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Microchannel heat exchangers (MCHXs) are widely employed in refrigeration and heat pump systems due to advantages of being more efficient, smaller in size, lower refrigerant charge, and cheaper price.
“Currently, microchannel heat exchangers (MCHXs) are widely employed in refrigeration and heat pump systems due to their advantages of being more efficient, smaller in size, lower refrigerant charge, and cheaper price.”
From Thermal-hydraulic and drainage performance of microchannel heat exchangers for refrigeration and heat pump systems under frosting, defrosting, and wet conditions: A comprehensive review (2023) · cites this paper as [6]
Section 7 (p. 16) says microchannel heat exchangers can achieve similar heat-transfer effectiveness with less than half the internal refrigerant volume, supporting the lower-charge and smaller-volume advantages. It does not support the claimed efficiency or price advantages: the paper says they are not cost-competitive for small-capacity air conditioners and heat pumps, and Section 8 (p. 20) reports efficiency degradation in its simulated system. The paper also does not establish that they are widely employed across refrigeration and heat pump systems. (LLM, conf=0.88)
Experimental — accuracy not yet measuredCompared with conventional fin-and-tube heat exchangers, microchannel heat exchangers have higher heat transfer efficiency, less refrigerant charging, and lower cost.
“Compared with the conventional fin-and-tube heat exchanger (FTHX), the MCHX has the advantages of higher heat transfer efficiency [1,2], less refrigerant charging [3], and lower cost [4,5].”
From Performance Improvement of Microchannel Heat Exchangers with Modified Louver Fins under Frosting Conditions (2023) · cites this paper as [4]
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Cites
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- Authors
- Shen, B., & Fricke, B.
- Affiliations
- Oak Ridge National Laboratory (US)
- Corresponding author
- Shen, Bo
- Venue
- Applied Thermal Engineering
- Publisher
- Elsevier BV
- Published
- 2020-02
- Volume
- 166
- Pages
- 114662
- ISSN
- 1359-4311 (ISSN-L)
- OpenAlex
- W2990578076
- Cited by
- 33
- References
- 10
- Citations by year
- 2026: 3 · 2025: 5 · 2024: 9 · 2023: 6 · 2022: 5 · 2021: 4 · 2020: 1
- FWCI
- 1.41
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Applied Thermal Engineering (acceptedVersion)
- OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
- Funders
- U.S. Department of Energy
- Building Technologies Office
- Topics
- Physical Sciences › Engineering › Mechanical Engineering › Refrigeration and Air Conditioning Technologies
- Physical Sciences › Engineering › Mechanical Engineering › Adsorption and Cooling Systems
- Physical Sciences › Engineering › Building and Construction › Building Energy and Comfort Optimization
- Keywords
- window air conditioner, propane, flammable refrigerants, hydrocarbon refrigerants, refrigerant charge reduction, compact heat exchangers, microchannel heat exchangers, rotary compressor, ENERGY STAR, energy efficiency, building safety regulations
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