Thermal insulation

Part 2 book "Transformer design principles" includes content: High voltage insulation design; electric field calculations; losses; thermal model of a core form power transformer and related thermal calculations; load tap changers; phase shifting transformers; cost minimization.

303p dianmotminh03 17-06-2024 1 0   Download

Part 2 of ebook "Sustainability through energy-efficient buildings" provides readers with contents including: energy conservation potential through thermal energy storage medium in buildings; silica aerogel blankets as super-insulating material for developing energy efficient buildings; heating ventilation and air-conditioning systems for energy-efficient buildings; improving energy efficiency in buildings - challenges and opportunities in the european context;...

166p giangdongdinh 28-05-2024 4 3   Download

Part 1 book "Electric power engineering handbook" includes content: Wind power, advanced energy technologies; photovoltaics, hydroelectric power generation; synchronous machinery; thermal generating plants; distributed utilities, concept of energy transmission and distribution; transmission line structures; insulators and accessories; transmission line construction and maintenance wilford caulkins and kristine buchholz,... and other contents.

265p dianmotminh01 20-05-2024 8 3   Download

Part 1 book "Electric power generation, transmission and distribution" includes content: Wind power, photovoltaic fundamentals, advanced energy technologies, water part II - electric power generation - conventional methods; hydroelectric power generation, synchronous machinery, thermal generating plants; distributed utilities; concept of energy transmission and distribution; transmission line structures; insulators and accessories; transmission line construction and maintenance,... and other contents.

413p dianmotminh01 20-05-2024 5 4   Download

Part 2 book "Electric power transformer engineering" includes content: Reactors, insulating media, electrical bushings, tap changers and smart intelligent controls, loading and thermal performance, transformer connections, transformer testing, load tap change control and transformer paralleling, power transformer protection, causes and effects of transformer sound levels,... and other contents.

411p dianmotminh01 20-05-2024 3 2   Download

Part 1 of ebook "Energy conservation in buildings - The achievement of 50% energy saving: An environmental challenge?" provides readers with contents including: a total energy design for 92 houses with combined use of solar heating and energy conservation; energy, environment and human development in the arab world; some experiments on improving thermal comfort and increasing useful thermal gains in sunspaces; haden court energy efficient estate improvement;...

239p dongmelo 20-05-2024 3 2   Download

Part 1 of ebook "Modern earth buildings: Materials, engineering, construction and applications" provides readers with contents including: introduction to modern earth buildings; overview of modern earth building; hydrothermal behaviour and occupant comfort in modern earth buildings; fabric insulation, thermal bridging and acoustics in modern earth buildings; modern earth building codes, standards and normative development;...

333p dangsovu 20-10-2023 4 3   Download

The proportional relationship between the infrared (IR) transmittance of a transparent material and its IR-induced heat transfer can be explained via a simple model. An agreement between the theory and the experimental work was examined by measuring the temperature rising inside a heat-insulated box with glass windows under IR irradiation, where the material of the glass windows was modified from corning glass (CG) to 9 at% Nb-doped TiO2 (TNO) fabricated by sputtering deposition.

6p viberbers 09-08-2023 4 3   Download

Cellulose aerogels are a potential candidate for heat insulation, but one of their drawbacks is high flammability hindering their applications in practice. This study synthesized cellulose aerogels from microfibrillated cellulose fibers (MFC) extracted from discarded pineapple leaves.

8p visirius 19-01-2023 8 4   Download

The followings will be discussed in part 1 of ebook Architects' Data (Third Edition): Draughting guidelines; measurement basis; design; construction management; buiding components; heating and ventilation; thermal and sound insulation; fire protection and means of escape; lightning protection and aerials; artificial lighting and daylight; windows and doors; stairs, escalators and lifts; refurbishment, maintenance and change of use; roods and streets; gardens; houses and residential buildings; educational and research facilities.

355p cucngoainhan6 10-01-2022 8 1   Download

This study explored the comparison of the thermal insulation effect of incubator to infusion thermometer in laparoscopic hysterectomy. Methods: We assigned 75 patients enrolled in the study randomly to three groups: Group A: Used warming blanket; group B: Used warming blanket and infusion thermometer; group C: Used warming blanket and incubator. The nasopharyngeal temperature at different time points during the operation served as the primary outcome.

5p vidietmarhopp 29-12-2021 14 0   Download

This paper presents a design, calculation, simulation and fabrication of micro gripper driven by the electrothermal V-shaped actuator. The working principle of the V-shaped actuator bases on the thermal expansion of a thin beam when applying a voltage. The advantages of this design are large displacement amplification factor, large driving force, low voltage, simple configuration and control. The maximum displacement of each jaw can be up to 40µm at the calculated voltage of 17.35V and low operating frequency

8p spiritedaway36 28-11-2021 6 1   Download

To the best of our knowledge, no studies have been conducted on the synthesis of FA aerogels by this technique. The FA aerogels generated are comprehensively investigated in terms of their physical properties such as density, porosity, morphology, and potential application in thermal insulation.

8p nguaconbaynhay12 13-06-2021 19 1   Download

This paper uses the infrared technology to investigate the temperature distribution of the 220kV power grid insulator string. The experiments were done in climate chamber to study. Firstly, determining the thermal stability time of the high voltage porcelain insulator called XP-70 type composing of 14 pieces under the tested voltage of 127kV based on the temperature and voltage distribution. And then the temperature distribution along the normal and fault insulator string experiments.

9p tunelove 12-06-2021 15 1   Download

Ultrathin silicon nitride SiNx membrane suspended on a silicon wafer is a popular twodimensional platform in MEMS applications. The unsupported membrane has a low thermal conductivity, is electrically insulated, and very robust against mechanical impact. Remarkably thin, it is difficult to fabricate and manipulate. Recently equipped with a dual chamber system for plasma enhanced chemical vapor deposition (PECVD) and reactive ion etching, we calibrate it to deposit silicon nitride Si3N4, silicon dioxide SiO2, and to dry etch these materials.

8p nguaconbaynhay11 07-04-2021 13 2   Download

Aerogel Composite from fly ash is an environmentally friendly material and applcation as an thermal insulating material. The synthesis of aerogel composite from fly ash using cross linked technique and freeze-drying method. The general condition of the material to be investigated factors such as fly ash concentration and adhesive, assimilation time, reaction temperature, drying condition.

6p viv2711 27-10-2020 8 0   Download

he amorphous core dry-type cast-resin transformer is a type of energy- saving transformer, which the no-load losses in the amorphous metal is generally lower from 60% to 70 % than regular electrical steel (silicon steel). In this paper, the iron core and winding thermal of the dry-type transformer are simulated/analysed via a finite element method. The analysis of temperature distribution characteristics of iron core and winding in transformers is a quite important problem for researchers to show the hot-spot and the temperature rise highest point.

8p covid19 03-03-2020 37 0   Download

The reactor design of the SCR system utilizes a fixed-bed catalyst in a vertical down-flow multi-stage configuration. The SCR reactor is designed to contain sufficient catalyst to meet the NOX guarantee requirement based on the specified inlet NOX. The reactor housing consists of standard plate construction containing stiffeners and structural supports for earthquake, catalyst support, sealing, loading stress, and thermal stress. The externally insulated reactor housing is constructed with a steel casing reinforced and supported by structural steel members.

9p khaionline91 02-05-2017 30 3   Download

This book is mainly intended for designers and users of magnetic components in power electronics. It can also be used for didactical purposes. Magnetic components such as inductors and transformers constitute together with the control and the semiconductor components, the main parts in the design of power electronic converters. Some experience teaches that the design of the magnetic parts is still often done by trial and error. This can be explained by a (too) long working-in time for designing inductors and transformers.

456p nguyenthai_thinh 16-03-2013 136 40   Download

The house has a cement block, crawl space foundation. The vented volume of the crawl space is about 115 m3 . The under-floor belly volume defined by the floor joists and the metal frame is approximately 65 m3 . The belly space contains the heating and cooling (HAC) supply air distribution ductwork, plumbing lines and thermal insulation and is separated from the crawl space by an insulated, woven polyethylene membrane. The attic space has a volume of 43 m3 above the vaulted ceiling. There are five roof vents and a series of eave vents extending along the...

235p ut_hai_can 29-12-2012 40 5   Download