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Journal articles on the topic 'ASHP'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Marsik, Tom, Vanessa Stevens, Robbin Garber-Slaght, Conor Dennehy, Robby Tartuilnguq Strunk, and Alan Mitchell. "Empirical Study of the Effect of Thermal Loading on the Heating Efficiency of Variable-Speed Air Source Heat Pumps." Sustainability 15, no. 3 (2023): 1880. http://dx.doi.org/10.3390/su15031880.

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Heating buildings with air source heat pumps (ASHPs) has the potential to save energy compared to utilizing conventional heat sources. Accurate understanding of the efficiency of ASHPs is important to maximize the energy savings. While it is well understood that, in general, ASHP efficiency decreases with decreasing outdoor temperature, it is not well understood how the ASHP efficiency changes with different levels of thermal loading, even though it is an important consideration for sizing and controlling ASHPs. The goal of this study was to create an empirical model of the ASHP efficiency as

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2

Chauhan, Mamta. "Technological Advancements and Environmental Impacts of Air Source Heat Pumps for Sustainable Cooling and Waste Heat Recovery in California Data Centres." Technological Advancements and Environmental Impacts of Air Source Heat Pumps for Sustainable Cooling and Waste Heat Recovery in California Data Centres 12, no. 3 2025 (2025): 22–28. https://doi.org/10.5281/zenodo.15115900.

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This study examines the advancements in air source heat pump (ASHP) technology and their environmental impacts in the context of sustainable cooling and waste heat recovery in California data centers. Emphasis is placed on how modern ASHP systems reduce cooling energy demand, enable heat reuse, and comply with new regulatory standards. The paper analyzes the state-of-the-art features of ASHPs—like improved coefficient of performance (COP), integration with district heating, and use of low-global-warming-potential (GWP) refrigerants—and evaluates their role in reducing carbon f

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3

Mamtakumari, A. Chauhan. "Technological Advancements and Environmental Impacts of Air Source Heat Pumps for Sustainable Cooling and Waste Heat Recovery in California Data Centres." European Journal of Advances in Engineering and Technology 12, no. 3 (2025): 22–28. https://doi.org/10.5281/zenodo.15118464.

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This study examines the advancements in air source heat pump (ASHP) technology and their environmental impacts in the context of sustainable cooling and waste heat recovery in California data centers. Emphasis is placed on how modern ASHP systems reduce cooling energy demand, enable heat reuse, and comply with new regulatory standards. The paper analyzes the state-of-the-art features of ASHPs—like improved coefficient of performance (COP), integration with district heating, and use of low-global-warming-potential (GWP) refrigerants—and evaluates their role in reducing carbon footpr

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4

Mamtakumari, A. Chauhan. "Technological Advancements and Environmental Impacts of Air Source Heat Pumps for Sustainable Cooling and Waste Heat Recovery in California Data Centres." European Journal of Advances in Engineering and Technology 12, no. 03 (2025): 22–28. https://doi.org/10.5281/zenodo.15166007.

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This study examines the advancements in air source heat pump (ASHP) technology and their environmental impacts in the context of sustainable cooling and waste heat recovery in California data centers. Emphasis is placed on how modern ASHP systems reduce cooling energy demand, enable heat reuse, and comply with new regulatory standards. The paper analyzes the state-of-the-art features of ASHPs—like improved coefficient of performance (COP), integration with district heating, and use of low-global-warming-potential (GWP) refrigerants—and evaluates their role in reducing carbon footpr

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5

Streckienė, Giedrė, Tomas Kropas, Rūta Mikučionienė, and Rasa Džiugaitė-Tumėnienė. "ENERGY AND EXERGY ANALYSIS OF AN AIR SOURCE HEAT PUMP UNDER VARIABLE AMBIENT CONDITIONS." Journal of Environmental Engineering and Landscape Management 32, no. 1 (2024): 12–21. http://dx.doi.org/10.3846/jeelm.2024.20771.

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Air source heat pumps (ASHPs) are becoming an increasingly popular heating source for buildings. The paper presents an evaluation of the experimental data from ASHP operation during the heating season in Lithuania when the problem of the evaporator’s surface freezing is visible. The performance of the air-to-water heat pump is examined using energy and exergy analyses performed by a coefficient of performance (COP), COPCarnot, exergy efficiency, and primary energy ratio. Analysis results show that the existing difference between the ideal and actual operation of ASHP represents the demand to i

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6

Wang, Zhen Qing, Yan Chen, and Hai Xia Wang. "Simulation Study on Solar Collector - Air Source Heat Pump Combined System for Space Heating in Cold Region." Applied Mechanics and Materials 238 (November 2012): 478–81. http://dx.doi.org/10.4028/www.scientific.net/amm.238.478.

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An air source heat pump system (ASHPS) was set up, which provided space heating and cooling, as well as hot water for an office building in Tianjin. Its operating performance in winter was evaluated based on test data. Considering the local abundant solar radiation and the way to provide energy in an office building, a simulation study was carried out on the combsystem of ASHP and flat plate air collector (FPAC). The effects of collector area and its outlet parameters on the heating performance of ASHP were studied, and the favorable operating and matching mode were recommended. The results in

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7

Cao, Shuanghua, and Yichun Wang. "A Review of Defrosting Technologies for Air Source Heat Pumps." Frontiers in Science and Engineering 5, no. 1 (2025): 48–55. https://doi.org/10.54691/a1npb922.

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Air source heat pumps (ASHPs) are widely used in building energy efficiency due to their high performance and environmental benefits. However, in cold climates, frosting of ASHP evaporators during winter operation reduces heating efficiency, affects user comfort, and may even cause system shutdowns or permanent damage. Therefore, optimizing the defrosting cycle, implementing intelligent frost control, and accurately detecting frost thickness are key challenges in both research and practice. This paper reviews recent advancements in defrosting technologies for ASHPs, focusing on the limitations

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8

Jiao, Feipeng, Guopeng Li, Chunjie Zhang, and Jiyuan Liu. "Study on the Coupling of Air-Source Heat Pumps (ASHPs) and Passive Heating in Cold Regions." Buildings 14, no. 8 (2024): 2410. http://dx.doi.org/10.3390/buildings14082410.

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Air-source heat pumps (ASHPs), as an active device, are widely used in building heating and cooling processes. However, in severe cold regions, they face reduced heating efficiency and frosting problems in winter. This paper proposes a new heating solution by coupling an ASHP with passive heating systems. It combines an ASHP with passive sunrooms and heat storage systems for heating. Through software simulations and mathematical modeling, the new scheme is compared and analyzed against traditional ASHP solutions to explore the performance of this scheme in rural houses in severe cold regions o

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9

McLaughlin, Susan S. "ASHP Affiliates." American Journal of Health-System Pharmacy 46, no. 11 (1989): 2224–39. http://dx.doi.org/10.1093/ajhp/46.11.2224.

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10

Graubart, Julian I. "ASHP Affiliates." American Journal of Health-System Pharmacy 46, no. 3 (1989): 451–69. http://dx.doi.org/10.1093/ajhp/46.3.451.

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11

QU, MINGLU, SHIMING DENG, and YIQIANG JIANG. "AN EXPERIMENTAL STUDY ON THE DEFROSTING PERFORMANCE OF A PCM-BASED REVERSE-CYCLE DEFROSTING METHOD FOR AIR SOURCE HEAT PUMPS." International Journal of Air-Conditioning and Refrigeration 18, no. 04 (2010): 327–37. http://dx.doi.org/10.1142/s2010132510000332.

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When an ASHP unit operates in heating mode, frost can be accumulated on the surface of its outdoor coil. Currently the most widely used defrosting method for ASHPs is reverse cycle defrost. However, the fundamental problem for such a method is that there is insufficient heat available for ASHPs during defrosting. This paper reports on an experimental study of developing a novel reverse-defrosting method which was thermal energy storage (TES) based on using phase change material (PCM). Comparative experiments were carried out at two operating conditions: standard defrosting condition and the PC

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12

Zhao, Rijing, Zengpeng Wang, Yu Sun, Fei Wang, and Dong Huang. "Effect of the Number of Circuits on a Finned-Tube Heat Exchanger Performance and Its Improvement by a Reversely Variable Circuitry." Applied Sciences 12, no. 18 (2022): 8960. http://dx.doi.org/10.3390/app12188960.

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The finned-tube heat exchanger (FTHX) works better with more circuits as an evaporator but fewer as a condenser in air-source heat pumps (ASHPs). In this article, a reversely variable circuitry is proposed to address this contradiction. The effects of the circuit number on the performance of an outdoor FTHX in an ASHP prototype was first studied numerically using the EVAP-COND 4.0 software. We showed that the evaporator capacity reached its peak with four circuits, but the condenser capacity decreased monotonously as the circuit number increased. A reversely variable circuitry was obtained by

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13

Enwere, Emmanuel N., Yao Hua Lin, Jason A. Morell, and Lindsey M. Childs-Kean. "ASHP Connect community." American Journal of Health-System Pharmacy 72, no. 12 (2015): 1002–5. http://dx.doi.org/10.2146/ajhp140524.

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14

Thompson, Cheryl A. "ASHP Daily Briefing." American Journal of Health-System Pharmacy 68, no. 18 (2011): 1696–97. http://dx.doi.org/10.2146/ajhp110157.

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15

Driver, Paul S. "Annals Of ASHP?" American Journal of Health-System Pharmacy 43, no. 4 (1986): 900. http://dx.doi.org/10.1093/ajhp/43.4.900.

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16

Potente, Elizabeth. "ASHP Summer Internship." American Journal of Health-System Pharmacy 50, no. 12 (1993): 2511–12. http://dx.doi.org/10.1093/ajhp/50.12.2511.

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17

Wei, Peng, Zhiwei Wang, Hengli Feng, Sheng Wang, and Jufang Fan. "Frost suppression performance of an air source heat pump using sensible heat from indoor air to preheat outdoor air." Building Services Engineering Research and Technology, July 26, 2023. http://dx.doi.org/10.1177/01436244231188708.

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Frost forms on the surfaces of air source heat pump (ASHP) outdoor heat exchangers under heating mode in winter, when the surface temperature of the heat exchanger is lower than both 0°C and the ambient dew point temperature. This can reduce the coefficient of performance (COP) and heating capacity of the ASHP unit. A novel ASHP was examined using two rooms with the same size, orientation, and structure. To test the frost suppression performance of the novel system, two ASHPs of the same size and specifications, but one including a sensible-heat preheating device, were placed in the test platf

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18

Liu, Meng, Xin Xie, Wenhui Yang, et al. "A two‐level optimal scheduling control strategy for air source heat pump loads with phase change energy storage." IET Generation, Transmission & Distribution 19, no. 1 (2025). https://doi.org/10.1049/gtd2.70004.

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AbstractReasonable scheduling and control of air‐source heat pumps (ASHPs) contribute to reducing operational costs for users while encouraging their participation in grid demand response. This article proposes a two‐layer optimal scheduling and control strategy for ASHP loads incorporating phase change energy storage (PCES). First, an electricity‐heat coupling model for ASHP loads is proposed. This model integrates PCES technology and considers the influence of outlet water temperature, ambient temperature, and the cold island effect on the coefficient of performance. Subsequently, a PCES cap

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19

"ASHP directory." American Journal of Health-System Pharmacy 42, no. 8 (1985): 1792–97. http://dx.doi.org/10.1093/ajhp/42.8.1792.

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20

"ASHP Affiliates." American Journal of Health-System Pharmacy 43, no. 10 (1986): 2354–72. http://dx.doi.org/10.1093/ajhp/43.10.2354.

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21

"ASHP Affiliates." American Journal of Health-System Pharmacy 43, no. 12 (1986): 2954–66. http://dx.doi.org/10.1093/ajhp/43.12.2954.

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22

"ASHP Reports." American Journal of Health-System Pharmacy 43, no. 12 (1986): 3031–33. http://dx.doi.org/10.1093/ajhp/43.12.3031.

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23

"ASHP Affiliates." American Journal of Health-System Pharmacy 43, no. 7 (1986): 1650–67. http://dx.doi.org/10.1093/ajhp/43.7.1650.

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24

"ASHP Affiliates." American Journal of Health-System Pharmacy 43, no. 8 (1986): 1876–95. http://dx.doi.org/10.1093/ajhp/43.8.1876.

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25

"ASHP Affiliates." American Journal of Health-System Pharmacy 43, no. 9 (1986): 2112–23. http://dx.doi.org/10.1093/ajhp/43.9.2112.

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26

"ASHP Affiliates." American Journal of Health-System Pharmacy 44, no. 1 (1987): 27–47. http://dx.doi.org/10.1093/ajhp/44.1.27.

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27

"ASHP Affiliates." American Journal of Health-System Pharmacy 44, no. 11 (1987): 2458–68. http://dx.doi.org/10.1093/ajhp/44.11.2458.

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28

"ASHP Affiliates." American Journal of Health-System Pharmacy 44, no. 12 (1987): 2665–87. http://dx.doi.org/10.1093/ajhp/44.12.2665.

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29

"ASHP Affiliates." American Journal of Health-System Pharmacy 44, no. 2 (1987): 250–57. http://dx.doi.org/10.1093/ajhp/44.2.250.

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30

"ASHP Affiliates." American Journal of Health-System Pharmacy 44, no. 3 (1987): 470–77. http://dx.doi.org/10.1093/ajhp/44.3.470.

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31

"ASHP Affiliates." American Journal of Health-System Pharmacy 44, no. 4 (1987): 696–708. http://dx.doi.org/10.1093/ajhp/44.4.696.

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32

"ASHP Affiliates." American Journal of Health-System Pharmacy 44, no. 6 (1987): 1269–95. http://dx.doi.org/10.1093/ajhp/44.6.1269.

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33

"ASHP Affiliates." American Journal of Health-System Pharmacy 44, no. 7 (1987): 1532–51. http://dx.doi.org/10.1093/ajhp/44.7.1532.

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34

"ASHP Reports." American Journal of Health-System Pharmacy 44, no. 7 (1987): 1641–46. http://dx.doi.org/10.1093/ajhp/44.7.1641.

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35

"ASHP Affiliates." American Journal of Health-System Pharmacy 44, no. 8 (1987): 1734–51. http://dx.doi.org/10.1093/ajhp/44.8.1734.

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36

"ASHP Directory." American Journal of Health-System Pharmacy 44, no. 8 (1987): 1850–56. http://dx.doi.org/10.1093/ajhp/44.8.1850.

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37

"ASHP Affiliates." American Journal of Health-System Pharmacy 44, no. 9 (1987): 1992–2004. http://dx.doi.org/10.1093/ajhp/44.9.1992.

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38

"ASHP Affiliates." American Journal of Health-System Pharmacy 45, no. 2 (1988): 278–83. http://dx.doi.org/10.1093/ajhp/45.2.278.

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39

"ASHP Affiliates." American Journal of Health-System Pharmacy 45, no. 5 (1988): 1032–36. http://dx.doi.org/10.1093/ajhp/45.5.1032.

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40

"ASHP Affiliates." American Journal of Health-System Pharmacy 45, no. 6 (1988): 1256–70. http://dx.doi.org/10.1093/ajhp/45.6.1256.

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41

"ASHP Affiliates." American Journal of Health-System Pharmacy 45, no. 7 (1988): 1469–70. http://dx.doi.org/10.1093/ajhp/45.7.1469.

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42

"ASHP Directory." American Journal of Health-System Pharmacy 45, no. 8 (1988): 1753–59. http://dx.doi.org/10.1093/ajhp/45.8.1753.

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43

"ASHP Affiliates." American Journal of Health-System Pharmacy 46, no. 1 (1989): 25–52. http://dx.doi.org/10.1093/ajhp/46.1.25.

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44

"ASHP Affiliates." American Journal of Health-System Pharmacy 46, no. 10 (1989): 1970–83. http://dx.doi.org/10.1093/ajhp/46.10.1970.

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45

"ASHP Affiliates." American Journal of Health-System Pharmacy 46, no. 12 (1989): 2434–41. http://dx.doi.org/10.1093/ajhp/46.12.2434.

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46

"ASHP Affiliates." American Journal of Health-System Pharmacy 46, no. 2 (1989): 220–39. http://dx.doi.org/10.1093/ajhp/46.2.220.

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47

"ASHP Affiliates." American Journal of Health-System Pharmacy 46, no. 4 (1989): 668–81. http://dx.doi.org/10.1093/ajhp/46.4.668.

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48

"ASHP Affiliates." American Journal of Health-System Pharmacy 46, no. 5 (1989): 898–905. http://dx.doi.org/10.1093/ajhp/46.5.898.

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49

"ASHP Affiliates." American Journal of Health-System Pharmacy 46, no. 6 (1989): 1092–115. http://dx.doi.org/10.1093/ajhp/46.6.1092.

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50

"ASHP Affiliates." American Journal of Health-System Pharmacy 46, no. 7 (1989): 1304–21. http://dx.doi.org/10.1093/ajhp/46.7.1304.

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