Pumped-storage hydroelectricity

Pumped-storage hydroelectricity ( PSH ), or pumped hydroelectric energy storage ( PHES ), is a type of hydroelectric energy storage used by electric power systems for load balancing. The method stores energy in the form of gravitational potential energy of water, pumped from a lower elevation reservoir to a higher elevation.

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Copper–water loop heat pipes for energy-efficient cooling …

An implementation of a cooling system with a loop heat pipe for thermal control of supercomputers is considered. For this purpose two copper–water loop heat pipes (LHPs) with an effective length of 400 mm and ID/OD diameters of the vapor lines of 3/4 and 4/5 mm correspondingly were designed and tested. The LHPs were equipped …

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Thermal energy storage: the role of the heat pipe in performance ...

As aids to temperature stratification in hot water storage tanks, to their incorporation in stores for heat or ''coolth'' using PCMs, the unique properties of heat …

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Chilled Water System Insulation: What You Need to Know

Chilled water systems play an important role in meeting the cooling needs of industrial and commercial facilities. Because chilled water pipes operate below ambient temperatures, proper insulation can protect these pipes from moisture and condensation problems such as corrosion and mold growth. Adequate insulation can also …

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Experimental study of temperature characteristic and energy consumption of a large-scale cold storage with buried pipe cooling …

A buried pipe cooling technology is proposed and used in cold storage. • The non-uniformity and fluctuation are used to evaluate the temperature. • The temperature characteristics at various vertical heights are investigated. • The specific energy consumption is only 7 ...

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Advances in Liquid Metal Science and Technology in Chip Cooling and Thermal Management …

Setup of hybrid liquid metal/water cooling system. Reprinted from Y. Deng, J. Liu, Hybrid liquid metal–water cooling system for heat dissipation of high power density microdevices, Heat Mass Transf. 46 (11–12) (2010) 1327–1334, with …

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Chapter 2 Underground Thermal Energy Storage

Chapter 2. ound Thermal Energy Storage2.1 IntroductionNature provides storage systems between the seasons because thermal energy is passively stored into the ground and. groundwater by the seasonal climate changes. Below a depth of 10–15 m, the ground temperature is not influence.

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District Cooling ‣ Qatar Cool

District Cooling. District cooling entails the production and circulation of chilled water to multiple buildings through a network of insulated underground pipes. Cooled water is pumped from the central plant through the pre-insulated underground pipes connected to the building connections, which is called Energy Transfer Station (ETS).

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8 Types of Pipe Joints and Their Uses in Plumbing …

Threaded joints are simple to install, but they require regular maintenance. 2. Soldering Joint: ( Types of Pipe Joints ) Soldering Joint. Soldering is also similar to brazing, but, the only difference is in the case of soldering, …

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Caulking | Department of Energy

Caulking. Caulk is a flexible material used to seal air leaks through cracks, gaps, or joints less than 1-quarter-inch wide between stationary building components and materials. For components that move -- doors and …

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Thermal performance and optimization of an integrated collector–storage solar air heater based on lap joint-type flat micro-heat pipe …

The black chromium-plated absorber was fixed to the surface of FMHPA-I. The thermal storage segment primarily consisted of a heat storage tank (HST), PCM, fins, and FMHPA-II. The mass of 52# industrial paraffin, which was applied as a PCM in HST, was 21.

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High velocity seawater air-conditioning with thermal energy storage and its operation with intermittent renewable energies

The rapid increase in cooling demand for air-conditioning worldwide brings the need for more efficient cooling solutions based on renewable energy. Seawater air-conditioning (SWAC) can provide base-load cooling services in coastal areas utilizing deep cold seawater. This technology is suggested for inter-tropical regions where demand for …

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Comprehensive Chilled-Water System Design

• 14°F+ cooling-tower range to save energy and cost • 50 percent or better cooling tower water turndown for efficient staging, waterside free cooling support and code compliance …

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Cooling technologies for data centres and telecommunication base stations – A comprehensive …

Data centres (DCs) and telecommunication base stations (TBSs) are energy intensive with ∼40% of the energy consumption for cooling. Here, we provide a comprehensive review on recent research on energy-saving technologies for cooling DCs and TBSs, covering ...

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Analytical solution for temperature field of nonmetal cooling pipe …

cooling water pipe is widely used in temperature control of mass concrete structures ... Thermal conductivity plays an important role in energy storage when the materials are charging and ...

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Achieving ultra-high strength friction stir welded joints of high nitrogen stainless steel by forced water cooling …

The air-cooled joint had a HAZ width of 1.6 mm (Fig. 1 (c)), whereas the width of the water-cooled HAZ was significantly reduced to about 0.4 mm (Fig. 1 (d)) due to rapid cooling of flowing water. Tungsten and rhenium distribution mapping results for the air-cooled and water-cooled joints are given in Fig. 2 .

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Thermal Energy Storage Overview

Water in a water–glycol solution is frozen into a slurry and pumped to a storage tank. When needed, the cold slurry is pumped to heat exchangers or directly to cooling coils to meet …

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Experimental investigation on the thermal performance of heat pipe-assisted phase change material based battery thermal management …

Heat Pipe (HP), as a high efficient heat transfer device with excellent characteristics such as compact structure, flexible geometry and long service life, has been widely used in thermal energy storage system [27], [28] and electronic thermal management [29].

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Feasibility study and multi-objective optimization of seawater cooling systems …

Data centers dissipate huge amount of energy through inefficient cooling systems. • Deep seawater can be a sustainable cooling resource for data centers. • Water pipes at a depth of 700 m at the Caspian Sea could supply water at …

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Pumped Storage Hydropower | Department of Energy

What is Pumped Storage Hydropower? Pumped storage hydropower (PSH) is a type of hydroelectric energy storage. It is a configuration of two water reservoirs at different elevations that can generate power as water moves down from one to the other (discharge), passing through a turbine. The system also requires power as it pumps water back into ...

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A seasonal cold storage system based on separate type heat pipe for sustainable building cooling …

Two types of cold energy storage, namely cold water storage and ice storage, can be realized in this system as daily based (night to day) or seasonal based (winter to summer) storage [15]. This paper therefore presents a novel seasonal cold storage system based on separate-type heat pipes for sustainable building cooling.

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Energy conservation approach for data center cooling using heat pipe based cold energy storage …

In the present paper, design and economics of the novel type of thermal control system for data center cooling using heat pipe based cold energy storage system has been proposed and discussed. Two types of cold energy storage system namely: Ice storage system and cold water storage system are explained and sized for datacenter with heat output …

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Mineralogical Evidence of Galvanic Corrosion in Drinking Water Lead Pipe Joints …

Galvanic corrosion as a mechanism of toxic lead release into drinking water has been under scientific debate in the U.S. for over 30 years. Visual and mineralogical analysis of 28 lead pipe joints, excavated after 60+ years from eight U.S. water utilities, provided the first direct view of three distinct galvanic corrosion patterns in …

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Thermal Energy Storage | Department of Energy

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 …

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Experiment study of oscillating heat pipe and phase change materials coupled for thermal energy storage and thermal management …

In this part, there was no PCM filled in the energy storage tank and the flow rate and entrance temperature of the cooling water were constant (Flow rate = 32 L/h, Twater = 15 C). Fig. 5 shows the temperature oscillation curves of CLOHP under different heating powers (30 W and 60 W) and angles (0, 45 and 90 ). ...

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Discharging characteristics modeling of cool thermal energy storage system with coil pipes …

The dynamic discharging characteristics of cool thermal energy storage system with coil pipes are studied by a discharging process model according to the energy balance of the phase change material and the heat transfer fluid. The n-tetradecane is taken as phase change material (PCM) and the aqueous ethylene glycol solution with 25% …

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Dynamic thermal performance of pipe-embedded building envelope utilizing evaporative cooling water in the cooling …

Fig. 1 sketches the principle of the pipe-embedded building envelope. Pipes are arranged in the building envelope, including the roof and external walls. Cooling water is circulated in the pipe to take away the heat in …

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Dynamic modelling of ice‐based thermal energy storage for …

Thermal Energy Storage (TES) is the term used to refer to energy storage that is based on a change in temperature. TES can be hot water or cold water storage where conventional …

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Performance investigation of an integrated collector–storage solar water heater based on lap-joint-type micro-heat pipe …

This study investigates a proposed novel integrated collector–storage solar water heater (ICSSWH) combined with lap-joint-type micro-heat pipe arrays (MHPAs) and latent heat storage. In the proposed system, the solar energy irradiated on ICSSWH is collected and stored in a phase-change material via MHPA with fins attached to the …

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Fin structure and liquid cooling to enhance heat transfer of …

1 INTRODUCTION As a power battery, lithium-ion batteries (LIBs) have become the fastest-growing secondary battery with the continuous development of electric vehicles (EVs). LIBs have high energy density and long service life. 1 However, the lifespan, performance and safety of LIBs are primarily affected by operation temperature. 2 The best temperature …

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Heat Transfer Modeling of an Annular On-Line Spray Water Cooling Process for Electric-Resistance-Welded Steel Pipe …

On-line spray water cooling (OSWC) of electric-resistance-welded (ERW) steel pipes can replace the conventional off-line heat treatment process and become an important and critical procedure. The OSWC process improves production efficiency, decreases costs, and enhances the mechanical properties of ERW steel pipe, especially …

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Data center energy conservation study utilizing loop heat pipes as a chip-level cooling …

This paper initiatively presents the basic energy conservation principle of chip-level cooling technique based on the loop heat pipe (LHP) for natural cooling throughout a year. An energy-saving theoretical evaluation model based on the LHP chip-level cooling method is developed for assessing the energy utilizing efficiency and …

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A Good Practice Guide for the Butt Fusion Jointing of Polyethylene Pressure Pipes …

A Good Practice Guide for the Butt Fusion Jointing of Polyethylene Pressure Pipes Contents 1. Introduction 2. The Butt Fusion Technique 3. Factors Affecting Weld Quality 4. Methods of Assessing Weld Quality 5. Installation Procedure 6. Standards 7. Case

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Chilled Water Design Specifications

The University of North Carolina - Chapel Hill owns, maintains a district cooling system and operates comprised of 4 production plants and a thermal energy storage system, …

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Combined Heat and Power Technology Fact Sheet Series: Thermal Energy Storage

Technology Description. TES technologies are often grouped into three categories: 1) sensible heat (e.g., chilled water/fluid or hot water storage), 2) latent heat (e.g., ice storage), and 3) thermo-chemical energy. 5. For CHP, the most common types of TES are sensible heat and latent heat.

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CN218731262U

The utility model belongs to the technical field of water-cooling pipe fittings of energy storage liquid cooling devices, and aims to provide a connecting water pipe for an energy...

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Applications of combined/hybrid use of heat pipe and phase change materials in energy storage and cooling …

Phase change materials (PCMs) have huge potential for latent thermal energy storage, waste heat recovery, heating, and cooling systems, due to their excellent thermal storage properties. However, the low thermal conductivity is most significant problem related with the PCMs, which retards the heat transfer rate and limits their …

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Copper–water loop heat pipes for energy-efficient cooling systems of supercomputers …

An implementation of a cooling system with a loop heat pipe for thermal control of supercomputers is considered. For this purpose two copper–water loop heat pipes (LHPs) with an effective length of 400 mm and ID/OD diameters of the vapor lines of 3/4 and 4/5 mm correspondingly were designed and tested. The LHPs were equipped …

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Chilled Water Design Specifications

Chilled water is centrally produced and distributed throughout the campus, and this district cooling system shall be utilized wherever possible. The district cooling system is comprised of four major subsystems; the production system, the distribution system, the building bridge system, and the building cooling system.

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Thermal performance of a radiant floor heating system with different heat storage materials and heating pipes…

Hot water Energy storage ratio of SSPCM floor 16–21% higher than concrete Li et al. [13] ... It can been seen that when capillary mat is used for heating pipes, the heat storage rate is higher than that for PE coils …

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How liquid-cooled technology unlocks the potential of energy …

Liquid-cooled battery energy storage systems provide better protection against thermal runaway than air-cooled systems. "If you have a thermal runaway of a cell, you''ve got this …

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