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熱管是一種長(zhǎng)而密封的翅片管，內(nèi)充制冷劑。管子略微傾斜，一端在室外進(jìn)氣口，另一端在排氣口。在加熱應(yīng)用中，制冷劑在較低的一端在溫暖的排氣中蒸發(fā)，蒸汽在較冷的室外空氣中向較高的一端上升，在那里它放棄蒸發(fā)熱并冷凝。吸管將液態(tài)制冷劑帶回?zé)岫耍h(huán)在熱端重復(fù)。熱管不需要能量輸入。對(duì)于冷卻，通過(guò)將管道傾斜到另一個(gè)方向來(lái)反轉(zhuǎn)該過(guò)程。控制裝置可以是氣動(dòng)、電動(dòng)、電子、數(shù)字或組合。在每個(gè)系統(tǒng)上使用獨(dú)立的控制回路可以實(shí)現(xiàn)令人滿意的控制?？刂葡到y(tǒng)可根據(jù)區(qū)域的要求調(diào)整中央系統(tǒng)的運(yùn)行，從而達(dá)到大的運(yùn)行效率和舒適度。這樣的系統(tǒng)可以節(jié)省足夠的運(yùn)營(yíng)成本，以便在短時(shí)間內(nèi)自行支付費(fèi)用?？諝馓幚硐到y(tǒng)和區(qū)域的控制裝置是由設(shè)計(jì)建筑的建筑師、工程師或團(tuán)隊(duì)專門為建筑設(shè)計(jì)的?？刂蒲b置通常安裝在作業(yè)現(xiàn)場(chǎng)。終端裝置控制裝置通常在工廠安裝。鍋爐、熱泵和屋頂機(jī)組通常與專為該機(jī)組設(shè)計(jì)的工廠安裝控制包一起出售。

A heat pipe is a long, sealed, finned tube charged with a refrigerant. The tube is tilted slightly with one end in the outdoor air intake and the other end in the exhaust air. In a heating application, the refrigerant vaporizes at the lower end in the warm exhaust air, and the vapor rises toward the higher end in the cool outdoor air, where it gives up the heat of vaporization and condenses. A wick carries the liquid refrigerant back to the warm end, where the cycle repeats. A heat pipe requires no energy input. For cooling, the process is reversed by tilting the pipe the other way. Controls may be pneumatic, electric, electronic, digital, or a combination. Satisfactory control can be achieved using independent control loops on each system. Maximum operating efficiency and comfort levels can be achieved with a control system which adjusts the central system operation to the demands of the zones. Such a system can save enough in operating costs to pay for itself in a short time. Controls for the air handling system and zones are specifically designed for a building by the architect, engineer, or team who designs the building. The controls are usually installed at the job site. Terminal unit controls are typically factory installed. Boilers, heat pumps, and rooftop units are usually sold with a factory-installed control package specifically designed for that unit.