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iplv研究ppt課件-資料下載頁

2025-01-14 07:03本頁面
  

【正文】 機(jī)組系統(tǒng) ? IPLV/NPLV is not available for multiple chiller system ? IPLV/NPLV計(jì)算法不能反映多機(jī)頭機(jī)組真實(shí)能效特性 ? IPLV/NPLV can not reflect the real efficiency performance of chiller with multiple pressors ? 不宜用全國(guó)統(tǒng)一的 IPLV/NPLV值指導(dǎo)實(shí)際工程的設(shè)計(jì) ? the unified national IPLV / NPLV values can not guide the real projects design 進(jìn)一步審視冷水機(jī)組標(biāo)定 (ASHRAE文章) A Closer Look at Chiller Ratings (ASHRAE Journal, ) ? 采用 IPLV有什么錯(cuò)? ? What’s wrong with using an IPLV – IPLV只評(píng)價(jià)單臺(tái)冷水機(jī)組的應(yīng)用 – IPLV evaluates a single chiller application only – IPLV僅采用4個(gè)特定負(fù)荷點(diǎn)及相應(yīng)的時(shí)間權(quán)重 – IPLV uses only four operating points with weighting factors – IPLV未考慮變頻機(jī)組的特性 – IPLV does not take variablespeed drives into consideration – IPLV用于比較機(jī)組卸載特性,并不能判斷是否省錢 – The intent of IPLV is to pare unloading characteristics, not to infer economic savings AHRI 對(duì)于綜合部分負(fù)荷值(IPLV/NPLV)的定義 IPLV/NPLV定義的機(jī)組負(fù)荷分區(qū) IPLV/NPLV operating buckets ? 機(jī)組卸載與冷卻水溫關(guān)系 AHRI relief ? 機(jī)組能耗與負(fù)荷率、壓縮機(jī)提升力相關(guān) ? Chiller efficiency is related to load percentage and lift 冷水機(jī)組 負(fù)荷率分區(qū)圖 亞特蘭大實(shí)例與 NPLV估算的差別 (二臺(tái)冷水機(jī)組的機(jī)房 ) 世界 9個(gè)城市的實(shí)例與 NPLV估算的差別(兩臺(tái)冷水機(jī)組的機(jī)房) 本研究中的全球氣候地區(qū) Global climates included in study 兩臺(tái)冷水機(jī)組機(jī)房的全球分析總結(jié) Summary of all global analysis( two chiller plant) IPLV的權(quán)重與全球各大城市 均值 比較 機(jī)組運(yùn)行時(shí)間權(quán)重百分比 機(jī)組負(fù)荷率 100% 75% 50% 25% IPLV 定義 1 42 45 12 各大城市 均值 45 28 9 18 三臺(tái)冷水機(jī)組卸載負(fù)荷分配圖 在芝加哥冷水機(jī)組臺(tái)數(shù)的影響 Impact of multiple chillers in Chicago 進(jìn)一步審視冷水機(jī)組標(biāo)定 A Closer Look at Chiller Ratings (ASHRAE Journal, ) ? 結(jié)論 Conclusions – IPLV/NPLV不應(yīng)作為衡量機(jī)組能耗的標(biāo)準(zhǔn)。當(dāng)審視一臺(tái)冷水機(jī)組實(shí)際運(yùn)行狀況時(shí),越來越明顯的特征是:高負(fù)荷區(qū)運(yùn)行點(diǎn)的性能非常重要。 – IPLV/NPLV should not be used as an efficiency standard. When looking at the real operation points of a chiller, it bees increasingly obvious that highload operation points are extremely important. 進(jìn)一步審視冷水機(jī)組標(biāo)定 A Closer Look at Chiller Ratings (ASHRAE Journal, ) ? 結(jié)論 ( 續(xù)) Conclusions (continued) – 希望找到 “類似 IPLV”的簡(jiǎn)易計(jì)算方法是可以理解的,但““類似 IPLV”的方法不能準(zhǔn)確描述系統(tǒng)中單臺(tái)機(jī)組的能耗。它也無法預(yù)測(cè)變頻機(jī)組的節(jié)能效果,和高成本導(dǎo)致的回收期限長(zhǎng)短。 – The desire to find the easy “IPLVtype” is understandable, but the “IPLVtype” can not accurately represent a chiller’s energy use in a system. It also can not predict the saving that can be associated with the additional investment of a VSD drive. 謝謝! 特靈空調(diào)系統(tǒng) (中國(guó) )有限公司 賈晶 綠色建筑與系統(tǒng)應(yīng)用高級(jí)經(jīng)理
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