熱泵的應(yīng)用外文翻譯

1、<p><b>　　外文翻譯</b></p><p>　　The Applications of Heat pumps</p><p>　　1.Heat pumps in industry </p><p>　　1). Systems</p><p>　　Relatively few heat pumps ar

2、e currently installed in industry. However, as environmental regulations become stricter, industrial heat pumps can become an important technology to reduce emissions, improve efficiency, and limit the use of ground wate

3、r for cooling</p><p>　　To ensure the sound application of heat pumps in industry, processes should be optimised and integrated. Through process integration improved energy efficiency is achieved by thermodyn

4、amically optimising total industrial processes. An important instrument for process integration is pinch analysis, a technology to characterise process heat streams and identify possibilities for heat recovery. Such poss

5、ibilities may include improved heat exchanger networks, cogeneration and heat pumps. Pinch analy</p><p>　　Industrial applications show a great variation in the type of drive energy, heat pump size, operating

6、 conditions, heat sources and the type of application. The heat pump units are generally designed for a specific application, and are therefore unique. </p><p>　　The major types of industrial heat pumps are:

7、 </p><p>　　Mechanical vapour recompression systems (MVRs), classified as open or semi-open heat pumps. In open systems, vapour from an industrial process is compressed to a higher pressure and thus a higher

8、temperature, and condensed in the same process giving off heat. In semi-open systems, heat from the recompressed vapour is transferred to the process via a heat exchanger. Because one or two heat exchangers are eliminate

9、d (evaporator and/or condenser) and the temperature lift is generally small, the per</p><p>　　Closed-cycle compression heat pumps are described in the section Heat pump technology . Currently applied working

10、 fluids limit the maximum output temperature to 120℃. </p><p>　　Absorption heat pumps (Type I) are not widely used in industrial applications. Some have been realised to recover heat from refuse incineration

11、 plants, notably in Sweden and Denmark. Current systems with water/lithium bromide as working pair achieve an output temperature of 100℃ and a temperature lift of 65℃. The COP typically ranges from 1.2 to 1.4. The new ge

12、neration of advanced absorption heat pump systems will have higher output temperatures (up to 260℃) and higher temperature lifts. </p><p>　　Heat transformers (Type II) have the same main components and worki

13、ng principle as absorption heat pumps. With a heat transformer waste heat can be upgraded, virtually without the use of external drive energy. Waste heat of a medium temperature (i.e. between the demand level and the env

14、ironmental level) is supplied to the evaporator and generator. Useful heat of a higher temperature is given off in the absorber. All current systems use water and lithium bromide as working pair. These heat transf</p&

15、gt;<p>　　Reverse Brayton-cycle heat pumps recover solvents from gases in many processes. Solvent loaden air is compressed, and then expanded. The air cools through the expansion, and the solvents condense and are

16、recovered. Further expansion (with the associated additional cooling, condensation and solvent recovery) takes place in a turbine, which drives the compressor. </p><p>　　2). Applications</p><p>

17、　　Industrial heat pumps are mainly used for: </p><p>　　space heating; </p><p>　　heating and cooling of process streams; </p><p>　　water heating for washing, sanitation and cleaning

18、; </p><p>　　steam production; </p><p>　　drying/dehumidification; </p><p>　　evaporation; </p><p>　　distillation; </p><p>　　concentration. </p><p&

19、gt;　　When heat pumps are used in drying, evaporation and distillation processes, heat is recycled within the process. For space heating, heating of process streams and steam production, heat pumps utilise (waste) heat so

20、urces between 20℃ and 100℃. </p><p>　　The most common waste heat streams in industry are cooling water, effluent, condensate, moisture, and condenser heat from refrigeration plants. Because of the fluctuatio

21、n in waste heat supply, it can be necessary to use large storage tanks for accumulation to ensure stable operation of the heat pump. </p><p>　　Space heating:Heat pumps can utilise conventional heat sources

22、for heating of greenhouses and industrial buildings, or they can recover industrial waste heat that could not be used directly, and provide a low- to medium temperature heat that can be utilised internally or externally

23、for space heating. Mainly electric closed-cycle compression heat pumps are used. </p><p>　　Process water heating and cooling:Many industries need warm process water in the temperature range from 40-90℃, and

24、 often have a significant hot water demand in the same temperature range for washing, sanitation and cleaning purposes. This can be met by heat pumps. Heat pumps can also be a part of an integrated system that provides b

25、oth cooling and heating. Mainly electric closed-cycle compression heat pumps are installed, but a few absorption heat pumps and heat transformers are also in use. </p><p>　　Steam production:Industry consume

26、s vast amounts of low-, medium- and high-pressure steam in the temperature range from 100-200℃. Steam is used directly in industrial processes, and for heat distribution. Current high temperature heat pumps can produce s

27、team up to 150℃ (a heat pump prototype has achieved 300℃). Both open and semi-open MVR systems, closed-cycle compression heat pumps, cascade (combination) systems and a few heat transformers are in operation. </p>

28、<p>　　Drying process:Heat pumps are used extensively in industrial dehumidification and drying processes at low and moderate temperatures (maximum 100℃). The main applications are drying of pulp and paper, various

29、 food products wood and lumber. Drying of temperature-sensitive products is also interesting. Heat pump dryers generally have high performance (COP 5-7), and often improve the quality of the dried products as compared wi

30、th traditional drying methods. Because the drying is executed in a close</p><p>　　Evaporation and distillation processes:Evaporation and distillation are energy-intensive processes, and most heat pumps are

31、installed in these processes in the chemical and food industries. In evaporation processes the residue is the main product, while the vapour (distillate) is the main product in distillation processes. Most systems are op

32、en or semi-open MVRs, but closed-cycle compression heat pumps are also applied. Small temperature lifts result in high performance with COPs ranging from 6</p><p>　　2．Heat pumps in residential and commercial

33、 buildings</p><p>　　1）.Functions</p><p>　　Heat pumps for heating and cooling buildings can be divided into four main categories depending on their operational function: </p><p>　　He

34、ating-only heat pumps, providing space heating and/or water heating. </p><p>　　Heating and cooling heat pumps, providing both space heating and cooling.The most common type is the reversible air-to-air heat

35、 pump, which either operates in heating or cooling mode. Large heat pumps in commercial/institutional buildings use water loops (hydronic) for heat and cold distribution, so they can provide heating and cooling simultane

36、ously. </p><p>　　Integrated heat pump systems, providing space heating, cooling, water heating and sometimes exhaust air heat recovery.Water heating can be by desuperheating only, or by desuperheating and c

37、ondenser heating. The latter permits water heating when no space heating or cooling is required. </p><p>　　Heat pump water heaters, fully dedicated to water heating.They often use air from the immediate sur

38、roundings as heat source, but can also be exhaust-air heat pumps, or desuperheaters on air-to-air and water-to-air heat pumps. Heat pumps can be both monovalent and bivalent, where monovalent heat pumps meet the annual h

39、eating and cooling demand alone, while bivalent heat pumps are sized for 20-60% of the maximum heat load and meet around 50-95% of the annual heating demand (in a European residenc</p><p>　　In residential ap

40、plications room heat pumps can be reversible air-to-air heat pumps (ductless packaged or split type units). The heat pump can also be integrated in a forced-air duct system or a hydronic heat distribution system with flo

41、or heating or radiators (central system). </p><p>　　In commercial/institutional buildings the heat pump system can be a central installation connected to an air duct or hydronic system, or a multi-zone syste

42、m where multiple heat pump units are placed in different zones of the building to provide individual space conditioning. Efficient in large buildings is the water-loop heat pump system, which involves a closed water loop

43、 with multiple heat pumps linked to the loop to provide heating and cooling, with a cooling tower and auxiliary heat source a</p><p>　　The different heat sources that can be used for heat pumps in residentia

44、l and commercial buildings are described in the section Heat sources. The next paragraph describes the types of heat and cold distribution systems that can be used in buildings.</p><p>　　2). Heat and cold di

45、stribution systems</p><p>　　Air is the most common distribution medium in the mature heat pump markets of Japan and the United States. The air is either passed directly into a room by the space-conditioning

46、unit, or distributed through a forced-air ducted system. The output temperature of an air distribution system is usually in the range of 30-50°C. </p><p>　　Water distribution systems (hydronic systems)

47、are predominantly used in Europe, Canada and the north eastern part of the United States. Conventional radiator systems require high distribution temperatures, typically 60-90°C. Today's low temperature radiator

48、s and convectors are designed for a maximum operating temperature of 45-55°C, while 30-45°C is typical for floor heating systems. Table 1 summarises typical temperature requirements for various heat and cold di

49、stribution systems. </p><p>　　Table 1: Typical delivery temperatures for various heat and cold distribution systems.</p><p>　　Because a heat pump operates most effectively when the temperature d

50、ifference between the heat source and heat sink (distribution system) is small, the heat distribution temperature for space heating heat pumps should be kept as low as possible during the heating season. </p><

51、p>　　Table 2 shows typical COPs for a water-to-water heat pump operating in various heat distribution systems. The temperature of the heat source is 5°C, and the heat pump Carnot efficiency is 50%. </p><

52、;p>　　Table 2: Example of how the COP of a water-to-water heat pump varies with the distribution/return temperature.</p><p><b>　　熱泵的應(yīng)用</b></p><p>　　1熱泵在工業(yè)上的應(yīng)用</p><p>&

53、lt;b>　　1）系統(tǒng)</b></p><p>　　目前，在工業(yè)領(lǐng)域當(dāng)中只有較少的熱泵得到運用。但，隨著環(huán)境要求的逐步的提高，工業(yè)熱泵變成一種可以用來減少散發(fā)，提高效率以及在制冷過程中限制地下水過多使用的重要的技術(shù)。</p><p>　　在總的工業(yè)流程中，能效的提高是通過綜合處理由熱力狀態(tài)來完成的。因此，為了確保熱泵在工業(yè)中的充分利用，這就需要合理、全面的處理。擠壓分析是

54、綜合處理中的一種重要的方法，這種技術(shù)能表現(xiàn)出處理熱的趨勢和鑒定熱回收的可行性，可行性包括改善熱交換網(wǎng)絡(luò)和熱泵。擠壓式分析對大型復(fù)雜的綜合控制過程是特別有效的，并且是一種一個挑選適合的熱泵的機(jī)會。</p><p>　　在工業(yè)應(yīng)用上，熱泵已經(jīng)在運行能源的形式、型號、控制條件、熱源和應(yīng)用方式上等許多方面都發(fā)生了很大的變化。熱泵各個組成部分通常是為了一個特殊的應(yīng)用而設(shè)計的，因此熱泵也是獨特的。</p>&l

55、t;p>　　工業(yè)熱泵的主要形式有：</p><p>　　機(jī)械蒸汽壓縮系統(tǒng)（MVRs），可分為開式和半開式熱泵系統(tǒng)。在開式系統(tǒng)中，來自工業(yè)過程的蒸汽被壓縮到高溫高壓，并且在同樣的過程中冷凝放熱。在半開式系統(tǒng)中，來自壓縮蒸汽的熱量被傳遞到一個熱交換機(jī)中。因為減少一個或兩個熱交換機(jī)（蒸發(fā)器和/或冷凝器）只能得到很小的溫升，但是MVR系統(tǒng)卻有較高的性能，性能系數(shù)（COPs）可達(dá)10～30。通用的MVR系統(tǒng)的工作熱源

56、溫度在70～80oC，釋放的熱量在110～150 oC，在特定情況下能達(dá)到200 oC。水是最普通的“工作流體”（即壓縮過程蒸汽），雖然在另一些過程蒸汽也被用，特別是在化學(xué)工業(yè)中最為明顯。</p><p>　　閉式循環(huán)壓縮熱泵在熱泵技術(shù)這一部分介紹。當(dāng)前提供的最大工作流體溫度為120 oC。</p><p>　　吸收式熱泵在工業(yè)上沒有得到廣泛的應(yīng)用，但是一些專家已經(jīng)意識到從廢棄的焚化植物中

57、取得熱量，尤其是在瑞典和丹麥。當(dāng)前水/溴化鋰系統(tǒng)工作部分的輸出溫度能達(dá)到100oC并且有65oC的溫升。有代表性的COP范圍是1.2～1.4。最近研制出的先進(jìn)的吸收式熱泵系統(tǒng)具有更高的輸出溫度（達(dá)到260oC）和更高的溫升。</p><p>　　熱交換器（Ⅱ型）和吸收式熱泵的組成部分和工作原理是一樣的，都通過熱交換器，實質(zhì)上不需要外部的驅(qū)動能。中間溫度（即在要求的標(biāo)準(zhǔn)和環(huán)境標(biāo)準(zhǔn)之間）的廢熱可以用來提供給蒸發(fā)器和發(fā)

58、生器。有用的高溫?zé)嵩谖掌髦蟹懦?。?dāng)前所有的系統(tǒng)都能夠用水和溴化鋰來作為工質(zhì)。這些傳熱裝置能達(dá)到一個150 oC的傳遞溫度，50 oC的溫升。在這些條件下的COP的范圍在0.45～0.48之間。</p><p>　　布雷頓熱泵循環(huán)可以在許多過程中的蒸汽中回收溶劑。載有空氣的溶劑先被壓縮然后釋放。空氣通過發(fā)生器得以冷卻，溶劑被冷凝和被回收。然后再把溶劑在渦輪機(jī)里膨脹（傳統(tǒng)的制冷，冷凝和溶劑回收的綜合），使渦輪機(jī)驅(qū)動

59、壓縮機(jī)。</p><p><b>　　2）應(yīng)用</b></p><p><b>　　工業(yè)熱泵主要用于：</b></p><p><b>　　空間加熱；</b></p><p>　　過程處理的供熱和制冷；</p><p>　　用業(yè)洗滌、公共衛(wèi)生、清潔用的水

60、加熱；</p><p><b>　　蒸汽生產(chǎn)；</b></p><p><b>　　干燥/除濕；</b></p><p><b>　　蒸發(fā)；</b></p><p><b>　　蒸餾；</b></p><p><b>　　

61、濃縮。</b></p><p>　　當(dāng)在干燥、蒸發(fā)、蒸餾過程中使用熱泵時，熱量可以在此過程中被循環(huán)利用。而在空間加熱，過程加熱和蒸汽生成的熱能，在20～100 oC之間的熱源被熱泵利用。</p><p>　　在工業(yè)中大部分廢熱物是冷水、流出物、冷凝物、濕氣和來自冷藏車間的冷凝熱。由于提供的廢熱的波動，必須用較大的儲藏箱去儲藏這些熱量，才能確保熱泵的穩(wěn)定運行。</p>

62、<p><b>　　空間加熱：</b></p><p>　　熱泵能利用傳統(tǒng)的熱源來給溫室和工業(yè)建筑供熱，或者也可以重新利用那些不能被直接利用的工業(yè)廢熱，并且提供一個低于中間溫度的熱，直接或間接地用于空間加熱。這種方式主要被閉式壓縮電熱泵運用。</p><p>　　過程處理的供熱和制冷：</p><p>　　許多工業(yè)需要保持一個40

63、～90oC的處理水，并且為了滿足洗滌、公共衛(wèi)生和清潔要求，常有一個即制冷又供熱的綜合的系統(tǒng)的一部分。這種情況下，主要采用閉式壓縮電熱泵。但是也有少量的吸收式熱泵和熱交換器被采用。</p><p><b>　　蒸汽生產(chǎn)：</b></p><p>　　因為蒸汽被直接用在工業(yè)過程中，和用于熱分配器，所以工業(yè)消耗大量的100～200oC的溫度范圍的低、中和高壓蒸汽。當(dāng)前，高溫

64、熱泵能生產(chǎn)高達(dá)150oC的蒸汽（一個標(biāo)準(zhǔn)的熱泵能達(dá)到300oC）。在此情況下開式和半開式MVR系統(tǒng)。閉式壓縮熱泵，串聯(lián)系統(tǒng)和一些熱交換器都可以應(yīng)用其中。</p><p><b>　　干燥處理：</b></p><p>　　熱泵被廣泛應(yīng)用在低溫和適溫（最大100oC）的工業(yè)蒸餾和干燥過程中。主要的應(yīng)用有紙漿和紙張的干燥，各種食品生產(chǎn)，木制品和木料。對溫度敏感的產(chǎn)品的干燥

65、也有應(yīng)用。熱泵干燥通常能提高干燥產(chǎn)品的質(zhì)量。因為干燥是在閉式系統(tǒng)中執(zhí)行的，從干燥食物等中散發(fā)的氣味大大減少。應(yīng)用于干燥處理的主要有閉式壓縮熱泵和MVR系統(tǒng)。</p><p><b>　　蒸發(fā)和蒸餾過程：</b></p><p>　　蒸發(fā)和蒸餾是能量集中的過程，因此在化工和食品加工中，大多數(shù)熱泵被安裝在這些過程中。在蒸發(fā)過程中，渣滓是主要的產(chǎn)品，而在蒸餾過程中蒸汽是主要

66、的產(chǎn)品。絕大多數(shù)系統(tǒng)是開式或半開式MVRs,但是閉式壓縮熱泵也可以運用其中。低溫升使得有6～30的COPs范圍的高性能。</p><p>　　2熱泵在住宅和商業(yè)建筑中的應(yīng)用</p><p><b>　　1）作用</b></p><p>　　為建筑提供熱量和制冷的熱泵按照它們的操作原則可以分為以下四種主要的類型：</p><p

67、>　　僅僅供熱的熱泵，提供熱空氣和/或者是熱水。</p><p>　　既供熱又供冷的熱泵，既提供熱空氣又提供冷水。</p><p>　　最普通類型的熱泵是可逆的空氣-空氣熱泵，它既可以用來供熱又能用于制冷。用在商業(yè)、政府機(jī)關(guān)的建筑中的大型熱泵采用冷熱分配的水循環(huán)，因此它們能同時供熱和制冷。</p><p>　　混合式熱泵，提供熱空氣、冷水、熱水，并且同時重新獲

68、得耗盡的熱空氣。</p><p>　　熱水可以通過換熱器加熱，或者通過換熱器和冷凝器加熱。當(dāng)只需要熱水，不需要熱空氣和冷水時，可以使用換熱器和冷凝器來進(jìn)行加熱。</p><p>　　熱泵的的水加熱器，充分的對水加熱。</p><p>　　熱泵通常直接從環(huán)境中提取空氣來作為熱源，但是也能作為排氣熱泵，或者在空氣-空氣熱泵和水-空氣熱泵的換熱器中。</p>

69、<p>　　在住宅房間的應(yīng)用中，熱泵可以采用可逆的空氣-空氣熱泵（無管或分散式）。熱泵也能整體的用于壓力-空氣管道系統(tǒng)或者屋面供熱或散熱器（中央系統(tǒng)）。</p><p>　　在商業(yè)、公共機(jī)構(gòu)建筑中，熱泵系統(tǒng)是從一個中央系統(tǒng)連接到空氣管道或水系統(tǒng)，或者是一個多區(qū)域的系統(tǒng)，復(fù)合式的熱泵是把熱泵單元放置在不同的地方，單獨進(jìn)行空氣調(diào)節(jié)。在大建筑物中用的是水循環(huán)熱泵系統(tǒng)，它包括一個封閉的水循環(huán)，復(fù)合式熱泵連接到

70、環(huán)路中去制冷或制熱，和一個冷卻塔和一個輔助的熱源。</p><p>　　熱泵在住宅和商業(yè)建筑中用到的不同的熱源將在熱源這一部分介紹。下面這一段介紹用在建筑中的供熱，制冷的型式。</p><p><b>　　2）冷熱分配系統(tǒng)</b></p><p>　　在日本和美國，熱泵已經(jīng)形成了成熟的市場，而在這成熟的熱泵市場中，空氣是最普通的交換介質(zhì)?？諝饽?/p>

71、被直接送入房間或者通過一個壓力管道系統(tǒng)。一個空氣系統(tǒng)的輸出溫度通常在30-50oC之間.</p><p>　　分水系統(tǒng)主要用在歐洲，加拿大和美國東北部地區(qū)。傳統(tǒng)的散熱器型式的系統(tǒng)要求的高溫通常在60-90 oC.現(xiàn)在的低溫散熱器和對流式散熱器設(shè)計的最大控制溫度在45-55 oC，30-45 oC用在屋面供熱。表格1概述了各種冷熱分配系統(tǒng)的溫度要求。</p><p>　　表格 1: 各種冷熱