建筑环境与能源应用工程专业英语9.pptVIP

* Topic Three: Typical heat pump systems-Surface water heat pump (open loop) Topic Three: Typical heat pump systems-Surface water heat pump (closed loop) * Heat balance Key problem ——Heat balance * 1. A Brief History history of heat pump 2. The Efficiency of a Heat Pump EER COP 3. Types of Heat Pumps Air-source Heat Pumps Water-source Heat Pumps Ground-water Heat pumps Closed-loop Heat Pumps Topic Five: Text learning and keywords * The basic principle of heat pump operation was first proposed by Nicholas Carnot in 1824 and then furthered by Lord Kelvin in 1852. 2. Rather than utilizing water as the heat source, most manufactures put their energies into air-source heat pumps, because many designers were under the mistaken impression that ground water resources were limited. propose: 提出 提议 further: 促进（发展） 拓展 put their energies into: 把精力投入到…中去 be under the mistaken impression: 误解 Topic Five: Text learning and keywords * 3. One air-source heat pump manufactured during this period reversed air flow over the coils rather than reversing the flow of the refrigerant. reverse: 颠倒(流向) reversing valve: 换向阀 Topic Five: Text learning and keywords 4. In other words, when called upon for cooling, the indoor air was directed over the indoor coil; when called upon for heating, the indoor air was directed over the outdoor coil. call upon(on): 要求 号召 direct: 引导 指导 direct a letter to a place Can you direct me to the railway station? indoor coil: 室内盘管 outdoor coil: 室外盘管 * 5. At the same time, air conditioning equipment was gaining in popularity and efficiency; 6. In an effort to equalize power loads, power companies began an active promotional campaign in support of heat pumps, in spite of the fact that the equipment was still not perfected. equalize: 补偿、平衡 power loads: 电力负荷 active: 积极的 promotional campaign:推广活动 促销活动 gain: 增加 获利 To