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Desiccant Enhanced Evaporative Air-Conditioning phần 3

Chúng tôi làm điều này bằng cách: • Thảo luận về các mục tiêu của một máy điều hòa không khí so với kỳ vọng • Thảo luận về các lợi ích của việc kết hợp công nghệ hút ẩm và làm mát bay hơi gián tiếp • Mô tả các DEVap A / C quá trình • Cung cấp một mô tả vật lý của thiết bị DEVap • | volume is frozen Ice Energy 2010 . This storage can be useful to enable maximum thermal use from solar or on-site CHP. LDACs leverage the latent storage capacity by producing more total cooling than the stored latent cooling. For example an LDAC may use 2 ton-h of latent storage but deliver 4 ton-h of total cooling. This is derived from an additional 2 tons of sensible cooling accomplished by the evaporative cooling system. LDAC Solar Energy Option Figure 2-7 LDAC schematic The latent COP for DEVap is 1.2-1.4 because it requires only modest salt concentration to function properly 30 -38 LiCl . Figure 2-8 shows the calculated efficiency of a two-stage regenerator using natural gas as the heat source. Moisture removal rate is also shown where the nominal rate is 3 tons of latent removal. 11 2 Stage Regenerator Performance Inlet Desiccant Concentration by weight Figure 2-8 Calculated two-stage regenerator moisture removal rate and efficiency performance 2.3.2 DEVap Process Air Flow Channel Using Membranes NREL Patented Design This section describes how the LDAC process is enhanced with NREL s DEVap concept. The DEVap process follows 1. Ventilation air 1 and warm indoor air 2 are mixed into a single air stream. 2. This mixed air stream now the product air is drawn through the top channel in the heat exchange pair. 3. The product air stream is brought into intimate contact with the drying potential of the liquid desiccant d through a vapor-permeable membrane e . 4. Dehumidification ii occurs as the desiccant absorbs water vapor from the product air. 5. The product air stream is cooled and dehumidified then supplied to the building space 3 . 6. A portion of the product air which has had its dew point reduced dehumidified is drawn through the bottom channel of the heat exchange pair and acts as the secondary air stream. 7. The secondary air stream is brought into intimate contact with the water layer c through a vapor-permeable membrane b . 8. The two air streams are .