Guide Editorial: Thermodynamic properties for function fluids in energy
The selection of fluids with appropriate thermodynamic properties is crucial for maximizing energy storage density and minimizing energy losses. There are also many
Guide Computational Fluid Dynamics Model Based on Thermal
Fluid dynamics takes the interaction between moving fluid and solid as the main research problem. The shape of flow channel in most types of plate heat exchangers is complex, and
Guide Advances in thermal energy storage: Fundamentals and
Even though each thermal energy source has its specific context, TES is a critical function that enables energy conservation across all main thermal energy sources Europe, it has been predicted that over 1.4 × 10 15 Wh/year can be stored, and 4 × 10 11 kg of CO 2 releases are prevented in buildings and manufacturing areas by extensive usage of heat and
Guide A Wind Power Plant with Thermal Energy Storage for Improving
The development of the wind energy industry is seriously restricted by grid connection issues and wind energy generation rejections introduced by the intermittent nature of wind energy sources. As a solution of these problems, a wind power system integrating with a thermal energy storage (TES) system for district heating (DH) is designed to make best use of the wind power in the
Guide Journal of Energy Storage
How pressure affects costs of power conversion machinery in compressed air energy storage; part II: Heat exchangers This part is devoted to the heat exchangers and basically assesses the engineering rationale behind the relationship between the cost per kW for HXs and operating pressure. the contribution of HX costs within the PCS
Guide Experimental and simulation investigation of lunar energy storage
This design enables continuous power generation throughout the lunar day and night by a simple static thermoelectric conversion system. Liu et al. proposed a heat pipe-based thermoelectric generator system using in-situ resource for thermal energy storage, consisting of heat pipes, thermoelectric modules and a heat storage unit. This
Guide Recent advancements in latent heat phase change materials and
The expression “energy crisis” refers to ever-increasing energy demand and the depletion of traditional resources. Conventional resources are commonly used around the world because this is a low-cost method to meet the energy demands but along aside, these have negative consequences such as air and water pollution, ozone layer depletion, habitat
Guide Hybrid manufacturing precision machinery production based on
This article introduces the current progress in thermal energy utilization in the manufacturing industry and finds that optimizing heat treatment processes has a significant
Guide Exergoeconomic optimization and working fluid comparison of low
Carnot Battery, which is previously known as Pumped Thermal Energy Storage (PTES) , is a promising energy storage technology to cope with the problems mentioned above s long cycle life, less geographical constraints and relatively low economic cost make it a competitive option in future electricity systems .Carnot Battery system typically consists of a
Guide Improving flexibility of thermal power plant through control
Control strategy optimization based on energy storage utilization in a thermal power plant. the dynamic coupling relationship between high and low-level units is obtained, and there is a 14-s time delay between the two power outputs, and a revised regulation strategy that employs load distribution factor and flow-rate feedforward
Guide Applications and technological challenges for heat recovery, storage
Thermal Energy Storage (TES) is a crucial and widely recognised technology designed to capture renewables and recover industrial waste heat helping to balance energy demand and supply on a daily, weekly or even seasonal basis in thermal energy systems .Adopting TES technology not only can store the excess heat alleviating or even eliminating
Guide Simulation of indoor thermal energy cycle in green building VR
With the increasing awareness of global climate change and environmental protection, the design concept of green buildings is gradually being valued. This study aims to explore the application of indoor thermal energy cycling based on Building Information Modeling (BIM) and Virtual Reality (VR) technology in green building design, with a focus on analyzing
Guide Thermal Energy Storage for Solar Energy Utilization: Fundamentals and
In this chapter, various types of thermal energy storage technologies are summarized and compared, including the latest studies on the thermal energy storage materials and heat transfer enhancements.
Guide Physical modeling and dynamic characteristics of pumped thermal energy
TES tank is a kind of equipment for storing thermal energy, usually used in solar thermal energy system, heat pump systems, industrial waste heat recovery, and other fields. Thermal management of TES tanks refers to the control and regulation of thermal energy inside the tank to realize the storage, release, and utilization of thermal energy.
Guide Editorial: Optimal design and efficiency improvement of fluid machinery
Liu et al. (Liu et al., 2023) studied the flow characteristics and evolution of vorticity force in liquid nitrogen cavitation flow using a two-phase flow model and an improved thermal cavitation model. Their research reveals the internal flow mechanism of fluid machinery and offers theoretical guidance for the design of such machinery.
Guide Fluid-thermal interaction in energy storage
The interplay between fluid dynamics and thermal processes is a fundamental aspect of many energy storage systems. By advancing our understanding and capability to engineer these interactions, it is possible to
Guide Experimental and numerical investigations with multifunctional heat
Along with the reduction in energy waste coupled with an increase in efficiency, the thermal energy storage (TES) systems are vital in refining the dependability and efficacy of the energy infrastructure and in reducing gap between supply and demand. This study aims to evaluate a parabolic trough collector by means of experimental investigation
Guide The impact of carbon capture, utilization, and storage (CCUS)
Carbon Capture, Utilization, and Storage (CCUS) primarily serves the purpose of mitigating emissions by capturing and separating CO 2 generated from the end of industrial processes or present in the air. CCUS is one of the most common end-of-pipe treatment approaches where CO 2 and other GHGs are removed from the atmosphere. The captured CO
Guide Exploration of new function for thermal energy storage:
Thermal energy is one of the most abundant forms of energy. Approximately 90 % of the world''s energy use involves generating or manipulating heat at various temperatures .However, a substantial portion of thermal energy has been wasted and has not been effectively applied .Energy storage is critical in many applications when the availability and demand of
Guide A review of nanotechnology fluid applications in geothermal energy
Geothermal energy is a high potential energy source that can provide heat and power with minimal emissions. Recent advances in nanotechnology show that nanoparticles, such as CuO, TiO 2, Al 2 O 3, and Ag suspended in water, can enhance the heat transfer coefficient and rate.Here, we present a comprehensive review of nanotechnology use in closed
Guide Analysis of heat transfer and fluid flow in thermal equipment
Heat transfer and flow fluid in thermal equipment is a concerned and basic topic in thermal area. The main objective of this thesis is to cultivate basic skills of analyzing a thermal problem and
Guide A comprehensive review of geothermal energy storage: Methods
Numerous solutions for energy conservation become more practical as the availability of conventional fuel resources like coal, oil, and natural gas continues to decline, and their prices continue to rise .As climate change rises to prominence as a worldwide issue, it is imperative that we find ways to harness energy that is not only cleaner and cheaper to use but
Guide Recent developments of thermal energy storage applications in
As reported by Miró et al. , thermal energy storage is one of the methods employed to increase the efficiency of waste heat recovery reducing the mismatch between waste heat thermal energy production and reuse. In thermal energy storage for waste heat recovery were divided into two main categories, on-site and off-site.
Guide Study on Thermal Performance of Single-Tank
For the intermittence and instability of solar energy, energy storage can be a good solution in many civil and industrial thermal scenarios. With the advantages of low cost, simple structure, and high efficiency, a single
Guide Sensible heat thermal storage energy and exergy
Regarding the HVAC&R applications, various TES technologies exist, such as sensible TES, latent TES and sorption TES , , which can be beneficial for the waste heat recovery and renewable energy utilization, etc.The selection and optimization of a TES system depends on many factors, including material thermal and physicochemical properties (density,
Guide Performance evaluation of absorption thermal energy storage
Efficient thermal energy storage and transmission are considered as two of the most significant challenges for decarbonisation in thermal energy utilization. The liquid-gas absorption thermal energy storage/transmission system is promising approach to tackle these challenges, owing to the long-term stability, flexibility in heat/cooling output
Guide Phase change material-based thermal energy storage
Although the large latent heat of pure PCMs enables the storage of thermal energy, the cooling capacity and storage efficiency are limited by the relatively low thermal conductivity (∼1 W/(m ⋅ K)) when compared to metals (∼100 W/(m ⋅ K)). 8, 9 To achieve both high energy density and cooling capacity, PCMs having both high latent heat and high thermal
Guide Advances and challenges in hybrid photovoltaic-thermoelectric
The demand for renewable and clean energy is rising in tandem with the growth of industries and economies. Global concerns about environmental pollution, climate change, and the fossil fuel crisis are increasing [, , ].Solar energy offers an abundant, reliable, environmentally friendly, and universally accessible solution to the world''s energy challenges [, , , ].
Guide Thermal Energy Storage for Solar Energy Utilization:
Solar energy increases its popularity in many fields, from buildings, food productions to power plants and other industries, due to the clean and renewable properties. To eliminate its intermittence feature, thermal energy storage is vital for efficient and stable operation of solar energy utilization systems. It is an effective way of decoupling the energy demand and
Guide Thermal parameter optimization design of an energy storage
Morandin et al. studied a type of CO 2 energy storage system that included heat pump cycle and heat engine cycle, which can realize the mutual conversion of electrical energy and energy storage medium thermal energy and cold energy, and complete the system operation process.Based on Brayton cycle, Wang et al. [25, 26] studied a liquid CO 2 energy
Guide Energy Cascade Utilization of Electric-Thermal Port Microgrids
Considering the electric-thermal coupling relationship at different thermal energy levels and utilizing the advantages of multi-energy complementarity, the energy flow structure of electric-thermal coupling cascaded utilization is shown in Fig. 9.4 om the energy perspective, it can be divided into electric power bus, steam bus, low-temperature hot water
Guide Classification, potential role, and modeling of power-to-heat and
Most of the power-to-heat and thermal energy storage technologies are mature and impact the European energy transition. However, detailed models of these technologies are usually very complex, making it challenging to implement them in large-scale energy models, where simplicity, e.g., linearity and appropriate accuracy, are desirable due to computational
Guide Optimization design and performance investigation on the
As the core component of the LPTES system, phase change material (PCM) has high heat storage density and low price .However, most PCM''s low thermal conductivity severely limits the system''s charging and discharging rate .Macro-encapsulated PCM allows the TES system to have a larger heat transfer area and reduces the risk of leakage
Guide Analysis of charging performance of thermal energy storage
The latent heat thermal energy storage (LHTES) technology based on solid-liquid phase change material (PCM) is characterized by high energy storage density, small
Guide Enhancing Heat Transfer and Energy Storage
Results show that utilization of fins with ascending length, when short and long fins are located in the inlet and outlet of heat transfer fluid respectively, can further promote the heat transfer and energy storage
Guide Large scale underground seasonal thermal energy storage in China
In China, coal is the still playing a dominant role in China''s energy grid for heating, ventilating, and air conditioning (HVAC), which has a huge impact on the environment .Nowadays, the percentage of respiratory diseases caused by air pollution is more than 30% in China, and the air pollution index is 2-5 times the highest standard recommended by World
Guide Analysis and optimization of thermal storage performance of
The convective heat transfer coefficient between the heat storage fluid and the inner wall of the thermal storage tank is 200.00 W/(m 2 ·K), and the convective heat transfer coefficient between the air and the outer wall of the tank is 2.69 W/(m 2 ·K) . To verify the insulation performance of the thermal storage tank, the maximum heat
Guide Measuring the energy production and utilization efficiency of
Although some efforts have been taken to reduce the fossil energy consumption and carbon emissions in the thermal power sector, a core task is to measure and analyze the energy production and utilization performance, as improving the energy efficiency is a useful tool for energy savings and carbon emission reduction (Wang et al. 2013, 2018; Bi et al., 2014;
Guide Multi-objective optimization of multi-energy complementary
The coupling and integration of solar PV and thermal collectors have been investigated and analyzed in CCHP systems. Wang et. al. proposed a system incorporating compound parabolic concentrators (CPC)- photovoltaic thermal (PV/T) collectors, gas turbine (GT), and absorption heat pump (AHP) for simultaneous solar power generation and heating,
Guide Triply Periodic Minimal Surface Structures: Design, Fabrication,
This review highlights the latest developments of triply periodic minimal surface (TPMS) structures with the aim of the system''s energy utilization.
Guide Journal of Energy Storage
In addition, the heat dissipation temperature of the servers in the data center was in the range of 35–45 °C , so the average energy storage and energy utilization rates could be held at a high level, when the waste heat recovery and emergency cooling were carried out by such shell and tube phase change heat exchanger in data center.
Guide Feasibility study of a high-temperature thermal energy storage
Using CO 2 for high-temperature aquifer thermal storage combines energy storage with CO 2 storage. Geological storage of CO 2 is currently the best and probably the only short to medium-term option to significantly enhance the carbon sink .Among potential CO 2 storage sites, saline aquifers are considered to be the most feasible and promising because of
6 Frequently Asked Questions about “The relationship between fluid machinery and thermal energy utilization and storage”
What are the advantages of functional thermal fluids?
As a new type of fluids, functional thermal fluids have the advantages of high heat storage density, large heat transfer rate and wide application range, thus reducing heat loss in the process of heat storage and heat transfer, and miniaturizing heat exchangers and corresponding pipelines.
What are functional thermal fluids?
As a new type of fluid, functional thermal fluids mainly include nanofluids (NFs) and phase change fluids (PCFs), which have the advantages of high thermal conductivity and high specific heat, can effectively improve the heat transfer efficiency and temperature uniformity of liquid cooling system.
How to develop functional thermal fluids with high heat carrying density?
Therefore, in order to develop functional thermal fluids with high heat carrying density and high heat transfer rate, some researchers consider combining the advantages of NFs and PCFs, and adding NPs and PCM particles into the base fluids at the same time to form composite fluids.
Why do we need efficient heat transfer fluids?
Therefore, there is an urgent need to develop efficient heat transfer fluids. As a new type of heat transfer fluids, functional thermal fluids mainly including nanofluids (NFs) and phase change fluids (PCFs), have the advantages of high heat carrying density, high heat transfer rate, and broad operational temperature range.
What properties are required for functional thermal fluids in BTMS applications?
Some of the properties currently required for functional thermal fluids in BTMS applications are: (a) High thermal energy carrying density; (b) high speed transmission of heat energy; (c) low pump consumption in pipeline transport. Of course, good stability is the premise of improving these performances.
What is theoretical research on functional thermal fluids?
Theoretical research on functional thermal fluids. To prepare functional thermal fluids with good properties, it is necessary to study its internal formation mechanism and flow characteristics. Establishing models to predict and theoretically explain the properties of functional thermal fluids can lay a foundation for experiments.