| 摘要: |
| 在热电冷联产系统中，溴化锂吸收式制冷机在制冷过程中排放了大量的废热，这些废热品味低，难以直接回收利用。在此提出了两级双效溴化锂制冷-热泵复合循环，该?环具有冷凝温度较高的特点，便于直接回收冷凝排放热。系统以背压汽轮机的背压蒸汽为热源，制冷的同时利用循环所排出的废热加热锅炉补充水至较高温度。以具有相同功效的双效溴冷机与单效溴化锂热泵联合运行作为对比循?环，制冷-热泵复合?环系统省去了一台蒸发器与冷凝器，减少了两个换热温差，并且通过热力计算、能量分析和分析表明，该?环的能量利用率与效率均有很大的提高，效率比对比?环提高了45%。 |
| 关键词: 热工学 制冷-热泵复合Ѭ环 两级双效 溴化锂 |
| DOI： |
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| 基金项目:国家自然科学基金（51006071）资助项目。 |
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| Hybrid Two-stage and Double-effect Lithium Bromide Refrigeration-heat Pump Compound Cycle |
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Huang Shaojun1, Lu Mei1, Zhu Jiaxian2, Li Ling1
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| (1.School of Energy and Power Engineering (SEPE), University of Shanghai for Science and Technology;2.Thermal Power Co., Ltd. of Shanghai Qingpu Industrial Park) |
| Abstract: |
| In CCHP system, The waste heat quantity emitted from lithium bromide absorption refrigeration is large and low grade, so it is difficult to use directly. This paper proposes a hybrid two-stage and double-effect Lithium Bromide refrigeration - heat pump compound cycle. In this cycle, the condenser could emit higher temperature heat, which could increase the utilization rate of emitted waste heat. The cycle’s heat source is the back pressure steam, and it can take advantage of the low-grade thermal energy emitted from the refrigeration process to heat up the boiler make-up water. This paper takes existing double-effect lithium bromide absorption refrigeration and the single effect lithium bromide heat pump as contrast, the refrigeration - heat pump compound cycle system omits an evaporator and a condenser, which could decrease the temperature difference in heat exchange. And the energy analysis and the exergy analysis show that the compound cycle can improve exergy efficiency and energy utilization efficiency. |
| Key words: Pyrology Refrigeration-heat pump compound cycle Two-stage and double-effect Lithium bromide |
