房间空调器的舒适性研究与性能测试（窗机）外文翻译资料

 2022-01-27 08:01

EXPERIMENTAL

OPERATING

AND

MAINTENANCE PROCEDURES

OPTIONAL

COMBINED CONVECTION AND
RADIATION

H112D

H112D_E_3_063 NOV 15

Page D

table of contents

SCHEMATIC 1

T2 (Heater Surface Temperature) Orientation 2

TYPICAL INSTALLATION 3

H112D shown with H112 (console) and HC112A Data Logger upgrade (underneath console) 3

description 4

INSTALLATION AND COMMISSIONING 5

Temperature Sensors . 5

Heated Cylinder....................................................... 5

Fan Motor and HI 12D instrument console................... 5

Anemometer 5

OPERATING PROCEDURE 6

MAINTENANCE . 7

General......................................................................................................................... 7

Heated Cylinder 7

USEFUL DATA 8

CAPABILITIES OF THE COMBINED CONVECTION AND RADIATION Hl 12D WITH THE HEAT TRANSFER SERVICE UNIT Hl 12 12

1. Determination of the combined (radiation and convection) heat transfer (Qr QJ from ahorizontal cylinder in natural convection over a wide range of power input and corresponding surface temperature.................................................. 13

2.Measuring the domination of the convective heat transfer coefficient hc at low surface temperatures and the domination of the radiation heat transfer coefficienthr at high surface hr at high surface temperatures................................................. 20

  1. Determination of the effect of force convection on the heat transfer from a cylinder at varying air velocities.............................................................................................. 27
  2. Determination of the local heat transfer coefficient around the cylinder.............. 35

SYMBOLS AND UNITS

Symbol units

As Area m2

D Diameter of Heated Cylinder m

F Area or geometric factor -

hc Heat Transfer Coefficient, Natural Convection W/m2k

hf Heat Transfer Coefficient,Forced Convection W/m2k

hr Heat Transfer Coefficien,Radiation W/m2k

I Heater Current A

K Thermal conductivity W/mk

L Heated cylinder length m

Nu Nusselt Number -

Pr Prandtl Number -

Qc Heat loss to natural convection W

Qf Heat loss to forced convection W

Qr Heat loss to radiation W

Qtot Total heat loss W

Re Reynolds Number -

t Temperature ℃

T Absolute Temperature (and Switch label) K

Ua Air velocity in duct m/s

Uc Effective velocity in duct m/s

V Voltage to heater V

sigma;Stefan Boltzmann constant for radiation

xi; Emissivity of cylinder

nu;Dynamic viscosity of air m2/s

theta; Angular Position 。

Subscripts

9 Ambient condition

10 Surface condition

a Ambient Condition

s Surface condition

f Film Condition

e ffective value

Figure D1

SCHEMATIC

Figure D2

T 2 (Heater Surface Temperature) Orientation

This cross-section of the duct and heater shows the location of the T2 thermocoupleand its relationship to airflow.

The T2 thermocouple is aligned with the thermocouple condutil exit from the heat terminal box. Rotation of the box causes rotation ol the heater and T2 location

Figure D3

TYPICAL INSTALLATION

H112D shown with H112(console) and HC113A Data Logger upgrade (above console)

全文共33425字，剩余内容已隐藏，支付完成后下载完整资料

英语原文共 39 页，剩余内容已隐藏，支付完成后下载完整资料

资料编号：[391]，资料为PDF文档或Word文档，PDF文档可免费转换为Word

原文和译文剩余内容已隐藏，您需要先支付 30元 才能查看原文和译文全部内容！立即支付

以上是毕业论文外文翻译，课题毕业论文、任务书、文献综述、开题报告、程序设计、图纸设计等资料可联系客服协助查找。

您可能感兴趣的文章