ARI GUIDELINE T-2002 Specifying the Thermal Performance of Cool Storage Equipment《冷却存储设备热处理规范》.pdf
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1、2002 GUIDELINE for AIR-CONDITIONING L, I I Storage Deviclet I I I I I I I Temperature of coolant supplied to the Load Temperature of coolant returning from the Load Temperature of coolant entering the Cool Storage Device. Temperature of coolant leaving the Cool Storage Device. Option A, B, C: Mechan
2、ical or Absorption Refrigeration Equipment (chiller) Figure 1. Cool Storage System Section 4. Classifications 4.1 Classjcation. Thermal Storage Equipment may be broadly classified as either “Sensible“ or “Latent,“ with further delineations as shown in Table 1 and as explained in subsequent paragraph
3、s. 4.2 Sensible Thermal Storage Equipment. Sensible Thermal Storage Equipment used for cooling is equipment that typically employs water as the storage medium. During the Charge Period, warm water (or other fluid) from the storage device is chilled to the desired temperature by a water chiller and r
4、eturned to the storage vessel, thereby storing the energy as Sensible Heat. During the Discharge (cooling) Period, the chilled water is pumped from storage to the load and the resultant warm water returned to storage. Any of several methods may be used to keep the warm return water separated from th
5、e stored chilled water, including separate or compartmentalized tanks or where only one tank is employed, labyrinths, membranes or thermal stratification. 2 Copyright Air-Conditioning and Refrigeration Institute Provided by IHS under license with ARINot for ResaleNo reproduction or networking permit
6、ted without license from IHS-,-,-AR1 GUIDELINE T - 2002 Type 4.3 Charge Discharge Fluid 1 Fluid Storage Media Classification Water Or Other Fluid Sensible Water or other fluid Water or other fluid Water or other fluid Latent Ice-on-Coil (External Melt) Table 1. Classifications of Cool Storage Equipm
7、ent I I I Secondary Coolant Water Ice Refrigerant Ice or other Phase Change Material Ice-on-Coil (Internal Melt) Secondary Secondary Coolant Coolant Refrigerant Refrigerant Encapsulated Ice or Phase Change Material Secondary Secondary Coolant Coolant Water Water Ice or other Phase Change Material Ic
8、e Harvester/ Chiller Water Refrigerant Ice Ice in Secondary Coolant Ice Slurry Latent Thermal Storage Equipment. Latent Thermal cooled as the ice on the coilsplates is Secondary Secondary Coolant Coolant Storage Equipment may be further categorized as Ice-on- Coil, Encapsulated Ice or Phase Change M
9、aterial, Ice HarvestedChiller or Ice Slurry. Although these devices are referred to as “Latent“ types, some of the stored energy is in the sensible form. 4.3.1 Coil: Ice-on-Coil. There are two types of Ice-on- 4.3.1.1 External Melt. During the Charge Period, a cold Secondary Coolant or refrigerant i
10、s circulated through the coils/plates causing ice to form on the external surfaces. Much of the liquid in the tank is not frozen. During the Discharge (cooling) Period, warm return water is circulated through the tank, external to the ice, whereby it is cooled by the melting ice. 4.3.1.2 Internal Me
11、lt. During the Charge Period, a cold Secondary Coolant or refrigerant is circulated through the coils/plates causing ice to form on the external surfaces. Most of the liquid in the tank is frozen. During the Discharge (cooling) Period, a warm return Secondary Coolant is circulated through the coils/
12、plates, internal to the ice, and melted. 4.3.2 Encapsulated Ice or Phase Change Material. Thermal Storage Equipment consisting of a tank or vessel densely packed with numerous, relatively small containers in which the storage medium (water-ice or other Phase Change Material such as eutectic salt) is
13、 encapsulated. During the Charge Period, water or Secondary Coolant, at a temperature below the phase change temperature of the storage media is circulated through the tank/vessel to effect a phase change (freezing) in the storage medium. During the Discharge (cooling) Period, warm return water or S
14、econdary Coolant is circulated through the tankvessel and cooled as the encapsulated storage media changes phase (melts). 4.3.3 Ice Harvester/Chiller. Thermal Storage Equipment which employs a vertical plate, vertical tube, drum type or other evaporator in conjunction with an evaporating refrigerant
15、 to produce ice from a thin film of water flowing over the external evaporator surface. Periodically, ice is harvested by passing hot refrigerant gas through the evaporator or passing a scraper over the external surface thereby causing the ice to fall, in flakes or chunks, into a storage tank. Durin
16、g the Discharge (cooling) Period, warm return water is circulated through the storage 3 Copyright Air-Conditioning and Refrigeration Institute Provided by IHS under license with ARINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AR1 GUIDELINE T - 2002 tank where it
17、 is cooled by the melting ice. Some Ice Harvesters may also serve as water chillers during the cooling period by circulating the warm return water over the evaporator where it is cooled (with or without making ice) before entering the storage tank. 4.3.4 Ice Slurry. Thermal Storage Equipment wherein
18、 an ice slurry is produced and stored by circulating a solution from a storage tank through an ice slurry generator. In the slurry generator, an evaporating refrigerant cools the solution, producing discrete ice crystals within the solution, which are returned to and retained within the storage tank
19、. During the Discharge (cooling) Period, warm return Secondary Coolant is circulated through the storage tank (directly or via the Ice Slurry generator which may at that time be operating as either an ice maker or a chiller) where it is cooled by the melting ice crystals. Section 5. Minimum Informat
20、ion Recommendations 5.1 User-Specijed Application Recommendations When specifying the application requirements for cool storage equipment, the user should provide, as a minimum, the following data for a design day (or design week, or other design period): a. - b. C. d. e. f. g. 4 Thermal Storage Sys
21、tem Load, tons kW, for each hour of the design day (referred to as “the Load“ throughout this guideline) Usage of the Thermal Storage Equipment being used during this hour (charge, partial cooling or off) for each hour of the design day Design Heat Sink Rejection Temperature, OF “CI, (information fo
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