Adiabatic compressed air energy storage (A-CAES) is an effective balancing technique for the integration of renewables and peak-shaving due to the large capacity, high efficiency, and low carbon use. Increasing the inlet air temperature of turbine and reducing the compressor power consumption are essential to improving the efficiency of A-CAES. …
Development of an Energy Efficient Extrusion Factory employing a latent heat storage and a high temperature heat pump 2020 [42] Heating, cooling Experimental Water R600 50 kW / / Paraffin, RT70HC (260 kJ/kg), T …
Solar thermal collectors and photovoltaic thermal panels panel [8] are regarded as main solar thermal collecting devices which are connected to the GHEs in serial or in parallel. To compensate the heat shortage of the water-based GHE for heating in winter, the solar assisted ground source heat pump (SAGSHP) system is usually …
In this present work, the performance of underground thermal storage in a solar-ground coupled heat pump system (SGCHPS) for residential building is experimentally analyzed. Then the system performance during a longer period is simulated by the unit modelling, and its parametric effects are discussed.
2.1. The calculation method of COP of system before solar seasonal storage process The COP of the GSHP system before solar seasonal storage process can be calculated as follows: (1) COP S = Q S N i + ∑ N j where COP S is the coefficient of performance of heat pump system, Q S is the total heating loads of system (kW h), N i is …
The final heat collection of a typical day in four seasons is 1.32 GJ, 1.37 GJ, 1.11 GJ and 0.91 GJ, respectively. The final heat storage efficiency is 49.61 %, 50.03 %, 63.88 % and 71.69 %, respectively. It can be noticed that …
The experimental parameters incorporated a thermal balance of soil, the performance of GSHP with or without solar seasonal storage, and the correlation between solar radiation and thermal storage. Outcomes revealed that the temperature of soil increase was 0.21 °C and the COP of the HP unit and system enhanced by 2.4% and …
Abstract. Despite having many promising advantages for environment and sustainability, renewable energy is not yet cost-competitive with crude oil in all locations due to issues with low capacity factor, grid instability, and intermittency. In particular, hybrids of geothermal and solar power systems (e.g. photovoltaic and concentrated solar ...
The performance of the solar heating system is investigated using an in-house developed finite-volume code. The dynamic system model, depicted in Fig. 3, consists of three coupled modules: (1) stratified thermal energy storage model, (2) multi-family building model, and (3) solar collector model. ...
In France weather conditions, Berdal et al. (2006) conducted an experimental study of a ground-coupled heat pump used in a 180 m 2 private residence combined with thermal solar collectors. They have shown that the energy injected into the ground represents 34% of the heat extracted, and the heat pumps'' coefficient of …
It is also shown that the connection of three solar collectors with an area of 81.6 m 2 for a GSHP system reduces the length of the ground heat exchanger by 15%. Ghoreishi-Madiseh et al. [32 ...
The Drake Landing Solar Community Project in Okotoks, Alberta consists of a community of 52 detached houses utilizing solar and geothermal energy for heating and seasonal thermal storage; and will reach above a 90% solar fraction after a …
Highlights. A multi-functional solar-assisted ground coupled heat pump is proposed. Optimizations on the ratio of collector area and ground loop length are performed. Energy performances and economic analysis are performed. Energy conservation of the system is validated. The system shows better applicability in Beijing than in Harbin.
We explore several configurations for integrating solar heat into the geothermal plant, and found the best approach had a solar thermal to electricity conversion efficiency of 24.3 %.
The present study investigates a novel method in thermal and computational modeling of Solar-BTES systems to enhance the accuracy of thermal …
For efficient operation of heating and cooling grids, underground thermal energy storage (UTES) can be a key element. ... LT-UTES uses fluids at temperatures lower than ~25–30 ; it is usually coupled with geothermal heat pump systems and improves the ...
This work investigates the potential design optimization of a SAGHP system in a mountain site by exploring many different alternatives to optimize the mutual …
Flywheels, stacked blocks, batteries, and outdoor thermal storage are notable examples of these non-traditional energy storage methods. Excess wind and solar Photovoltaic energy are used to warm ...
In this article, power generation using solar and geothermal sources when simultaneously operated as CHP plants for waste heat recovery (WHR) is reviewed with …
Thermal-integrated pumped thermal electricity storage (TI-PTES) could realize efficient energy storage for fluctuating and intermittent renewable energy. However, the boundary conditions of TI-PTES may frequently change with the variation of times and seasons, which causes a tremendous deterioration to the operating performance. To …
In order to overcome the limitations of traditional clean energy utilization methods, this paper proposed an innovative technical solution for a combined heating system that cleverly integrated solar, wind, and geothermal energy to achieve …
Abstract. An integrated renewable energy supply system is designed and proposed to effectively address high building energy consumption in Zhengzhou, China. This system effectively provides cold, heat, and electricity by incorporating various clean energy sources such as wind, solar, hydrogen, and geothermal energy.
For the case of Tianjin, the efficiency of underground thermal storage based on the total solar radiation and absorbed solar energy by the collectors can reach over 40% and 70%, respectively. It is suggested that the reasonable ratio between the tank volume and the area of solar collectors should be in the range of 20–40 L/m 2 .
The increasing demand for energy makes it difficult to replace fossil fuels with low-carbon energy sources in the short term, and the large amount of CO2 emitted by fossil fuel combustion increases global warming. Carbon capture and storage (CCS) technologies for reducing CO2 emissions in power plants and industrial processes have …
This research aims to improve the performance of an office building based on a new operation strategy for an evacuated tube solar collector-U-tube ground heat exchanger system. The main problem with the traditional operation strategy is the mismatch between the chiller capacity and the real cooling demand, which leads to operation of the …
In this research, optimum design of a combined solar collector, geothermal heat pump and thermal seasonal storage system for heating and cooling a sample greenhouse is studied.
The integrated use of multiple renewable energy sources to increase the efficiency of heat pump systems, such as in Solar Assisted Geothermal Heat Pumps (SAGHP), may lead to significant benefits in terms of increased efficiency and overall system performance especially in extreme climate contexts, but requires careful …
Recently, systems for simultaneously producing electrical and thermal energy have been examined to boost efficiency and use energy resources most. By using the simultaneous production systems of electric and heat energy, achieving a high efficiency of 70% is possible based on the actual rates. Establishing the ideal functioning …
The thermal-electric efficiency and overall efficiency of the PV/T collector can be determined using Eqs. (31–33) [47], [48]. Download : Download high-res image (161KB) Download : Download full-size image Fig. 14. The variations in …
Abstract Solar thermal power plants for electricity production include, at least, two main systems: the solar field and the power block. ... that require a synthetic oil return temperature above a minimum value to guarantee a high …
The thermal performance of ground heat exchanger (GHE) is significant for the operating efficiency of the ground source heat pump (GSHP) systems. This paper presents a comprehensive review of developments and advances of three kinds of GHE, including vertical borehole GHE (VBGHE), Pile GHE (PGHE), and deep borehole GHE …
The thermal efficiency of the coupled power station is 11.21% larger than that of the single air cooled geothermal ORC power station, which makes up the adverse effect of the temperature rise in ...
Thermal energy storage (TES) is a critical enabler for the large-scale deployment of renewable energy and transition to a decarbonized building stock and energy system by 2050. Advances in thermal energy storage would lead to increased energy savings, higher performing and more affordable heat pumps, flexibility for shedding and shifting building …
This paper studies the surveys the writing to the advancement and utilization of stored heat of thermal energy systems or thermal energy storage (TES) - based solutions in space …
As with any heat pump, geothermal and water-source heat pumps are able to heat, cool, and, if so equipped, supply the house with hot water. Some models of geothermal systems are available with two-speed compressors and variable fans for more comfort and energy savings. Relative to air-source heat pumps, they are quieter, more efficient, last ...
A basic natural gas system with a prime mover unit, absorption chiller, and electricity and thermal storage components is coupled with solar photovoltaic panels and a ground source heat pump. A multi-objective optimization method is proposed and employed to optimize the configurations of the hybrid system and thereby achieve optimal …
In this paper, two novel supercritical compressed carbon dioxide energy storage systems coupled with concentrating solar thermal storage are proposed. One is a simple compression cycle, and the other is a split compression cycle, which is used to increase the utilization of compression heat and waste heat as well as explore the …
Abstract. Solar assisted ground source heat pump systems (SAGSHPs) have been recently scrutinized by many researchers as it was verified that they have increased the share of renewable energies ...
The results showed that larger solar fields generate more heat and thermal storage reduces the amount of heat dumped. This also improves the flexibility and can reduce levelized cost of electricity (LCOE). Geothermal-solar systems may also be used to …
Capital-intensive, low-operating-cost nuclear and solar thermal power plants are most economical when operated under base-load conditions. However, electricity demand varies on a daily, weekly, and seasonal basis. In deregulated utility markets this implies high prices for electricity at times of high electricity demand and low prices for electricity at times of …
An integrative renewable energy supply system is designed and proposed, which effectively provides cold, heat, and electricity by incorporating wind, solar, hydrogen, geothermal and storage energy. The interaction between the PV/T and borehole heat exchanger coupling is investigated, analyzing their impact on individual system …
2.1 SGCPSS System Introduction. In Tianjin, a demonstration project of Solar-Ground Coupled Heat Pump with Seasonal Storage (SGCHPSS) was set up with solar energy utilization, phase change heat storage, inter-seasonal energy storage and Ground-Coupled Heat Pump. The building has 3 floors with total building area of 5700m2.