Weak current College】 【HVAC professional English CRT (9).

<br> Hydraulic calculation <br> Section 3.5.1, hydraulic calculation hydrauliccalculation <br> <br> In order to make the system the lengths of pipe flow meet design requirements, pipe diameter selection, calculation and pressure balance, and a series of .operational processes. <br> <br> Section 3.5.2 loop loop circuit; <br> <br> Especially fluid can be circulating flow in a closed circuit. <br> <br> Section 3.5.3 most negative loop indexcircuit <br .> <br> System fluid loop resistance max. <br> <br> Section 3.5.4 common segment commonsection <br> <br> System common to all the loops. <br> <br> Section 3.5.5 non-common segment .non-commonsection <br> <br> The loop in the system of non-common parts. <br> <br> The first section of pipe pipesection 3.5.6 <br> The direct sun radiation section 2.4.7 directsolarradiation <br> .<br> Solar radiation in and orientation perpendicular to the plane of the received directly from the Sun that is not including through atmospheric scattering that part of the solar radiation. <br> <br> Section 2.4.8, sky diffuse radiation skyradiation <br .> <br> As a result of atmospheric scattering function from the parts of the hemisphere sky reach the ground of that portion of the solar radiation, also called diffuse solar radiation. <br> <br> Section 2.4.9 total radiation globalradiation <br .> <br> Reach the level of the ground of direct solar radiation and scattering of radiation and the sky. <br> <br> Section 2.4.10 of solar radiation intensity solarirradiance <br> <br> To the Sun as a radiation source ., in a form of radiation on the surface of the illumination. <br> <br> The first section 2.4.11 atmospherictransparency atmospheric transparency; coefficientofatmospherictransparency <br> <br> In the given case solar elevation angle, atmosphere to direct solar radiation in .a transmission ratio, also known as a big dare to transparent coefficient. <br> <br> <br> <br> HVAC professional English CRT (10) <br> Heating <br> <br> Section 3.1.1 of heating heating .; spaceheating <br> <br> Indoor access to heat and maintain a certain temperature, so as to achieve appropriate living conditions or working conditions of the technology, also known as heating. <br> <br> 3.1.2 central heating centralheating; .concentratedheating <br> <br> Heat and cooling equipment set, consists of a heat pipe to each individual room or building supply thermal heating means. <br> <br> 3.1.3 comprehensive heating <br> <br> For the entire heating .rooms maintain a certain temperature requirements set for heating. <br> <br> Section 3.1.4 localheating local heating <br> <br> For the indoor local area or local workplace keep at a temperature of heating. <br> <br> .Section 3.1.5 continuous heating intermittentheating <br> <br> For all day use of buildings, the average temperature all day indoors can lead to the design temperature in heating mode. <br> <br> The intermittent heating intermittentheating 3.1.6 < .br> <br> For non-use of buildings throughout the day, only their use of time, the average temperature reaches the temperature in the non-use hours can be natural cooling heating means. <br> <br> The first article on .duty heating standbyheating 3.1.7 <br> <br> In non-work time or disruptive use of time, in order to make the building to maintain a minimum temperature of heating such request. <br> <br> Section 3.1.8 article .hot water heating hotwaterheating <br> <br> To hot water as heating medium. <br> <br> Section 3.1.9 of high temperature hot water heating hightemperaturewaterheating; high-pressurehotwaterheating <br> <br> The temperature is higher than 100 .° c hot water as heating medium, also known as hot water heating. <br> <br> Paragraph 3.1.10 of steam heating steamheating <br> <br> To steam as heating medium. <br> <br> The first section .3.1.11 high-pressuresteamheating high pressure steam heating <br> <br> To work under pressure higher than the steam for htm 70kPa heating. <br> <br> The first section of low pressure steam heating 3.1.12 low-pressuresteamheating < .br> <br> To working pressure lower than or equal to 70kPa but higher than when the atmospheric pressure of steam as heating medium. <br> <br> The first article vacuum heating vacuumheating 3.1.13 <br> <br> Working pressure .lower than local atmospheric pressure of steam heating. <br> <br> The first article convective heating convectionheating 3.1.14 <br> <br> Using convection or mainly with convection heating means. <br> <br> The bar radiator heating radiatorheating .3.1.15 <br> <br> By radiator heat to the Interior to reach room temperature requirements for heating. <br> <br> 3.1Article .16; hot-air heating warm-airheating hotairheating <br> <br> Use of .hot air for medium convective heating methods. <br> <br> The first article concentrated style 3.1.17 warm localizedairsupplyforair-heating <br> <br> At a certain height, the hot air from a Department or agency to send larger speed, .the cause Jet district and recirculation zone of hot air heating. <br> <br>.