最新供热计算公式

1、热网供热计算公式供热量=（供水温度回水温度）X热网循环水流量1 大卡（千卡）kcal=4.17kJ1 大卡 kcal=1.163w某台机组热网循环水量4000t/h,供水温度85C、回水温度55C,计算该机组每小时供热量。供热量=（85-55） X 4000/1000= 120百万大卡120X4.17=500.4 百万千焦=500.4 吉焦（GJ）120X 1.163=13956X 104 瓦（W） =139.56 兆瓦（MW ）吉焦千瓦时兆瓦时百万大卡MKcal吨蒸汽焰GJKW. hMW.hTiGcal1吉焦（百万千焦）12780. 2780. 240.41千瓦时0. 003610. 001

2、0. 000860. 001431兆瓦时3.6100010. 861.431百万大卡4. 18711631. 16311.6671吨饱和蒸汽焙2.57000. 70.61初中英语语法归纳复习：被动语态重难点：掌握八种常见时态的被动语态，并能根据不同情景，灵活运用被动语 态。【知识总结归纳】概念：表示动作与主语之间是被动关系的句子是被动语态。二.主动语态与被动语态之间如何转换We Visited that factory last summer - 主动语态状语That factorywas visitedby uslast summer t被动语态主语谓语宾语状语三.各种不同时态的主动语态与被

3、动语态的对比时态主动语态被动语态般现在时am / is / are + PP(1 ) Do they speak French ?(2 ) They dont use the room Is French spoken by them ?The room isnt used by them 一般过去时was / were + p.p.(1) The hunter killed a tige(2 )He wrote many stories last year A tiger was killed by the hunter.Many stories was written by him las

4、t yea现在进行时am / is / are +being +p.p.(1) These workers are building a new bridge (2 )He is men ding his car A new bridge is being built by these workers His car is being mended by him过去进行时(1 )He was selling books Books were being built by himwas / were + being + p.p.(2 ) They were discussing the plan at that time The plan was being discussed by them at that time .现在