An air-source hybrid absorption-compression heat pump with large temperature lift

Gao, Jiao; Xu, Z.Y.; Wang, R.Z.

doi:10.1016/j.apenergy.2021.116810

Cited by 39 publications

(5 citation statements)

References 86 publications

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“…2a, current heat pumps can provide heating temperatures up to 180 1C and are available at the MW level. 8,9 These systems use various types of compressors including screw, scroll, and centrifugal, and are available in a range of sizes from micro to large scale. In terms of working fluids, both natural and certain synthetic refrigerants are used, each of which is suitable for different temperature ranges.…”

Section: Multi-scale Strategies For Heat Pumps In Deep Thermal Manage...mentioning

confidence: 99%

Heat pumps as a sustainable bridge for global heating and cooling at multi-scale

Yan,

Ahrens,

Hertwich

et al. 2024

Energy Environ. Sci.

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Section: Multi-scale Strategies For Heat Pumps In Deep Thermal Manage...mentioning

confidence: 99%

Heat pumps as a sustainable bridge for global heating and cooling at multi-scale

Yan,

Ahrens,

Hertwich

et al. 2024

Energy Environ. Sci.

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“…A compression ratio of 3 allows a rise in the cooling water inlet temperature by 10 K, and enables the use of low-temperature waste heat below 70 • C. Sun [60] put the compressor between the generator and the absorber, producing a heating temperature of the new system up to 125 • C. In order to obtain a heating temperature above 100 °C, Sun [61] coupled the compression cycle with the second absorption cycle type, as shown in Figure 5c; the hot water temperature could reach 135 °C and the COP was 3.6. Gao [62,63] proposed a new type of air source hybrid heat pump, as shown in Figure 5d. The new cycle could increase the input temperature from 10 °C to 100 °C with a COP of 1.4.…”

Section: Hybrid Heat Pumpmentioning

confidence: 99%

“…In order to obtain a heating temperature above 100 • C, Sun [61] coupled the compression cycle with the second absorption cycle type, as shown in Figure 5c; the hot water temperature could reach 135 • C and the COP was 3.6. Gao [62,63] proposed a new type of air source hybrid heat pump, as shown in Figure 5d. The new cycle could increase the input temperature from 10 • C to 100 • C with a COP of 1.4.…”

Section: Hybrid Heat Pumpmentioning

confidence: 99%

A Review of Super-High-Temperature Heat Pumps over 100 °C

et al. 2023

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The high-temperature heat pump, as a low-carbonization technology, has broad application prospects in replacing boiler heating, reducing carbon dioxide emissions, and improving the energy utilization efficiency. In this paper, the working fluid, cycle process, key equipment (compressor), and application scenarios of high-temperature heat pumps are introduced in detail. Firstly, the research direction of the working fluid is introduced and the existing working fluid substitution is analyzed and summarized. Then, the characteristics of different heat pump cycles such as compression, absorption, and hybrid heat pumps are introduced. In the aspect of key equipment, the application range and research status of different types of compressors are emphatically introduced. Finally, the application scenario of high-temperature heat pumps is prospected. In addition to the application of industrial heating, it is often used for heat storage to improve the regulatory characteristics of the system. The new heat pump electricity storage system has great application potential in the field of renewable energy consumption. Based on the above analysis of high-temperature heat pumps, four development prospects are put forward: low-Global-Warming-Potential (GWP) working fluid; cycles of temperature lift greater than 80 °C; a compressor with better high-temperature performance; and circulation characteristics of heat pump electricity storage.

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“…Recent activities encompass 4 th generation ultralow temperature district heating networks [99] to supply electrical heat pumps that upgrade heat at any higher temperature. Thermodynamic assessments have shown that such arrangements can achieve high second law theoretical efficiency ranging up to 60% [100] and possibly higher if the temperature is controlled within few tens of degrees [101]. Actual demonstrations are limited to a few documented cases [102] that, however, highlight the advantage of coupling ultralow temperature heat with heat pumps to use surplus of electrical energy.…”

Section: Ultralow Temperature Waste Heat Utilisationmentioning

confidence: 99%