Temporospatial techno-economic analysis of heat pumps for decarbonising heating in Great Britain

Wang, Yang; He, Wei

doi:10.1016/j.enbuild.2021.111198

Cited by 17 publications

(8 citation statements)

References 40 publications

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“…This program aims at increasing the use of renewable energy and improving the energy efficiency. The selected value of subsides has the same order of magnitude of current economic incentives used in other countries (0.15 $/kW h in the UK) …”

Section: Resultsmentioning

confidence: 99%

“…The selected value of subsides has the same order of magnitude of current economic incentives used in other countries (0.15 $/kW h in the UK). 74 A sensitivity analysis is conducted changing the electricity source (hydro energy, wind energy, PV panel, geothermal energy, PV/T system, and grid system) to evaluate the total cost of the new proposed process. The cost of electricity in Switzerland from hydro energy is 0.078 $/kW h, that from wind energy is 0.12 $/kW h, that from PV is 0.1 $/kW h, that from geothermal energy is 0.18 $/kW h, and that from PVT is 0.067 $/kW h. 72 The value of the economic incentives is in the range between 0.05 and 0.25 $/kW h. The results are reported in Table 7: only for higher levels of incentives, economic benefits are ensured with a net total cost lower than that of the base case.…”

Section: Results Of Economicmentioning

confidence: 99%

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Innovative Process Integrating Air Source Heat Pumps and Direct Air Capture Processes

Leonzio

Shah

2022

Ind. Eng. Chem. Res.

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Most integrated assessment models indicate a need for technological carbon dioxide removal from the atmosphere to achieve climate mitigation targets. Currently, direct air capture (DAC) appears to be one the “backstop” technologies suitable to provide this service. These technologies usually require low-carbon heat as part of their operation cycle. Here, we consider a way of providing this heat when no local heat source is available. Air source heat pump (ASHP) water heaters are a well-known technology that takes heat from the air to supply hot water. Variations on their operating conditions could provide water at 100 °C, when a trans-critical cycle is used. This level of temperature is required by several DAC adsorption processes as the thermal energy for the regeneration stage. For this reason, an innovative process integrating an ASHP and a DAC adsorption system is proposed here. The heat pump provides not only heating but also cooling, while three separate stages (adsorption, cooling, and regeneration) are considered for the DAC. In the integrated process, the air is sent to the adsorbent bed at first and after that to the evaporator of the heat pump and then used for the cooling stage. The hot water supplied by the heat pump is used for the desorption. Different working fluids (CO2, CO2-ethane, CO2-R41), with low ozone depletion and global warming potentials, are investigated. The results show that a high level of efficiency is possible for heat pumps supplying hot water at 100 °C. Moreover, energetic advantages are present with reference to the base case, where heat is provided by a municipal water incinerator and cooling by a cooling tower. Savings in the energy consumption of 55, 60, and 53% for the integrated process using CO2, CO2/R41, and CO2/ethane, respectively, are possible. Economic benefits are present when economic incentives are provided, ensuring lower costs up to 39 $/tonCO2, and the technology benefits from location flexibility as only a power supply (and not a heat source) is required.

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Section: Resultsmentioning

confidence: 99%

Section: Results Of Economicmentioning

confidence: 99%

Innovative Process Integrating Air Source Heat Pumps and Direct Air Capture Processes

Leonzio

Shah

2022

Ind. Eng. Chem. Res.

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“…However, a few works have focused on optimizing the GSHP's design parameters to reduce costs or improve efficiency. New approaches for mapping a techno-economic geothermal potential of a shallow system have been proposed [96,97]. Surface temperature, ground temperature, and ground thermal characteristics, for example, can be measured at various sites and then dispersed on maps.…”

Section: Techno-economic Analysismentioning

confidence: 99%

A Critical Review on the Use of Shallow Geothermal Energy Systems for Heating and Cooling Purposes

Ahmed

Assadi

Mehrjerdi³

et al. 2022

Energies

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The reduction of CO2 emissions has become a global concern. In this regard, the EU intends to cut CO2 emissions by 55% by 2030 compared to those of 1990. The utilization of shallow geothermal energy (SGE) in EU countries is considered the most effective measure for decarbonizing heating and cooling. SGE systems utilize heat energy collected from the earth’s crust to provide secure, clean, and ubiquitous energy. This paper provides a literature review on the use of SGE for heating and cooling purposes. The latest advances in materials, new innovative structures, and techno-economic optimization approaches have been discussed in detail. Shallow geothermal energy’s potential is first introduced, and the innovative borehole structures to improve performance and reduce installation cost is outlined. This is followed by an extensive survey of different types of conventional and thermally enhanced collectors and grouts. Attention is mainly given to the techno-economic analysis and optimization approaches. In published case studies, the least economic break-even point against fossil fuel-based heating systems occurs within 2.5 to 17 years, depending on the local geological conditions, installation efficiency, energy prices, and subsidy. Ground source heat pumps’ cost-effectiveness could be improved through market maturity, increased efficiency, cheap electricity, and good subsidy programs.

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“…One notable advantage of heat pumps is their eco-friendliness and cost-effectiveness compared to conventional heating and cooling systems that rely on fossil fuels [7]. By utilizing the ambient heat from the environment, heat pumps minimize the need for direct combustion of fossil fuels [8], thereby reducing costs, greenhouse gas emissions [9] and contributing to environmental sustainability [10,11]. Additionally, since heat pumps primarily rely on electricity for their operation, they offer the potential for utilizing renewable energy sources, further enhancing their environmental benefits.…”

Section: Introductionmentioning

confidence: 99%

Energy Performance Analysis of R32 and R134a Refrigerant for Spring Pool Water Heater

Hadi,

Wijaya,

Elysabeth

et al. 2023

adeletters

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For a country with a tropical climate, such as Indonesia, heat pump technologies are usually necessary in high-altitude regions, where the temperatures tend to be cooler, such as a pool heater for an artificial hot spring swimming pool. A vapor compression heat pump’s optimal performance relies on its working fluid’s characteristics. This paper aimed to assess the performance and compare the time required to heat a hot spring pool using heat pumps with two different refrigerants: R32 and R134a. A thermodynamic modeling approach was employed to determine the better refrigerant choice between R32 and R134a for the heat pump, aside from other important factors that are considered when selecting the refrigerant, such as safety and environmental impacts. Comparing the results of R134a and R32 refrigerants, R134a has a higher GWP value than R32, indicating that R32 is more environmentally friendly. Regarding safety, R134a has low toxicity and flammability, while R32 exhibits low toxicity and mild flammability. Thus, R134a is considered safer than R32. Furthermore, the COP value of R134a was found to be higher than that of R32, indicating that R134a offers greater efficiency for the heat pump compared to R32.

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Temporospatial techno-economic analysis of heat pumps for decarbonising heating in Great Britain

Cited by 17 publications

References 40 publications

Innovative Process Integrating Air Source Heat Pumps and Direct Air Capture Processes

Innovative Process Integrating Air Source Heat Pumps and Direct Air Capture Processes

A Critical Review on the Use of Shallow Geothermal Energy Systems for Heating and Cooling Purposes

Energy Performance Analysis of R32 and R134a Refrigerant for Spring Pool Water Heater

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