Technical leaflet Thermostatic expansion valves with fixed orifice

Transcription

1 MAKING MODERN LIVING POSSIBLE Technical leaflet Thermostatic expansion valves with fixed orifice Type TDE / TDEB

2 Contents Page Introduction Features Technical data MOP valves Identification Application Design and function Ordering Standard range R Standard range R7C Capacity R R7C Sizing Dimensions and weights DKRCC.PD.AM0.A3.02 / 5H4608

3 Introduction TDE/TDEB is a series of thermostatic expansion valves of the highest technical standards with dedicated design for use in applications such as: Air conditioning systems, Heat pumps, Water chillers, Refrigerated containers, Traditional refrigeration systems. TDE is designed for soldering into hermetic systems and is supplied in straightway versions. The product prograe includes standard single port versions (TDE as well as a balanced port design (TDEB developed especially for biflow applications. TDE is available for ranges K, AC and N. All versions are available in both industrial and single packs. This leaflet contains data and code numbers for TDE valves for refrigerants R22 and R7C. TDE valves for R34a are manufactured to order, and consequently no code numbers are available. A note on type designation TDE is the standard single port version, TDEB is the biflow balanced port version. The accompanying digit denotes the rated in, whereas X denotes R22 refrigeration and Z is used for R7C types. Consequently TDEX 6 is a standard single port valve for R22 with a rated of 6 (2 kw, whereas TDEBZ 6 is a biflow balanced port version for R7C with a rated of 6 (56 kw. Features Versions with two-way balanced port Head pressure independent Versions for biflow application (excl. valves with MOP Refrigerants: R22, R7C TDE for R34a manufactured to order. Contact Danfoss for further information Capacities from.5 to kw (3 to for R22 and R7C Versions with MOP (Max. Operating Pressure charge Versions with universal cross-ambient charge Versions with self-cleaning bleed Superheat adjustable during operation Compact and hermetically tight design Laser welded, stainless steel thermostatic element: - optimum regulation ability - long diaphragm life - high pressure strength DKRCC.PD.AM0.A3.02 / 5H4608 3

4 Technical data Max. bulb temp. C with MOP 0 C without MOP Max. valve body temp. C, short-term C Max. working pressure PS/MWP = 28 bar Max. test pressure p' = 32 bar Equalizing connection / 4 in./6 solder ODF Capillary tube length TDE m TDE m TDE m Biflow operation TDEB with two-way balanced port and universal cross-ambient charge is designed for biflow operation. With flow in the opposite direction, the rated is reduced by 5%. TDE types with MOP charges cannot be used for biflow operation. Bleed 5% (on request MOP valves MOP-points Refrigerant Range K 25 + C Range AC +5 C MOP point for evaporating temperature t e and evaporating pressure p e t e = +5 C/+60 F t e = + C/+68 F R22 p e = 0 psig/6.9 barg p e = psig/8.5 barg R7C p e = 95 psig/6.6 barg p e = 5 psig/8.0 barg P e in bar gauge To avoid charge migration when MOP valves are used, the bulb temperature must be lower than the thermostatic element temperature. Identification Essential valve data is given on the element label. Example, fig. TDEX = Type (X: refrigerant R22/R7C 8 = Rated Q nom. in Tons of Refrigeration 28 kw = Rated Q nom. in kw R22/R7C = Refrigerant 25/+ C = Evaporating temperature range ( C 5/+ F = Evaporating temperature range ( F 068H42 = Code number BP 5 = Bleed 5 % MOP 0 = Max. Operation Pressure PS 28 bar/ MWP 0 psig = Max. working pressure 288 = Date marking (week 28, 998 Fig. 4 DKRCC.PD.AM0.A3.02 / 5H4608

5 Application TDE EVR SGI/SGN DCL/DML Fig. 2. Traditional refrigeration plant Indoor coil 4-way valve Outdoor coil TDE TDE SGI/SGN DCB/DMB NRV Fig. 3. Conventional system with suer/winter operation NRV 4-way valve Indoor coil Outdoor coil DCR TDEB Fig. 4. Simplified unit with suer/winter operation Fig. 2 is a diagram of a traditional refrigeration plant where TDE is used for flow in one direction only. Fig. 3 is a conventional split air conditioning/heat pump system with cooling/heating operation and two expansion valves with fixed direction of flow. The system is shown in a cooling mode. The system shown requires two thermostatic expansion valves, e.g. TDE, and two NRV check valves. SGI/SGN is placed in the liquid line before TDE, in this case with cooling as primary function. Changeover between cooling and heating is performed via a 4-way solenoid valve. Fig. 4 is similar to the previous system but as a compact unit with a short distance between evaporator and condenser. This system is also shown in a cooling condition. The two expansion valves have been replaced by one TDEB biflow valve. Check valves are not required. Changeover is by means of a 4-way valve. A suction filter drier is often placed in suction lines just before the compressor. The normal flow direction of TDEB is determined by the primary function, i.e. cooling or heating. DKRCC.PD.AM0.A3.02 / 5H4608 5

6 Design and function Flow direction:. Bulb with capillary tube 2. Thermostatic element 3. Thrust pad 4. Valve body 5. Throttling cone assembly 6. Setting spindle for static superheat SS 7. Setting spindle assembly 8. Protective cap Fig. 5 Single port design (TDE TDE is designed with straight through solder connections, fixed orifice and thermostatic element. Two push pins in non-friction stuffing boxes connect the power assembly with the orifice. The thermostatic element characteristics is designed to nominal at less than 4K opening superheat in accordance with ANSI/ARI The standard factory setting is 4K, so the operating or total measurable superheat is 8K as table values. Port design The TDE series of thermostatic expansion valves features two different orifice designs: single port and balanced port. TDE are designed with single port. TDE 8-9 is available in both single port versions (TDE and balanced port versions (TDEB. TDE - is designed with balanced port. Normal: A B Reverse: B A Fig. 6 Biflow balanced port design (TDEB Port design and application The choice between single or balanced port is based on an assessment of the power balance of the application. The power balance is expressed as static superheat variation as a function of the condensing pressure or pressure drop across the orifice. For the TDE 8-9, where both single port and balanced port versions are available, the right selection for your application is based on the diagram in figure 7/8, which shows the variations in superheat as a function of the condensing pressure. If TDE 8-9 is to be used for applications with two-way power balance (e.g. biflow applications the balanced port versions must be used. Fig. 7 Static superheat variation, TDE 8-9 (single port design Static Superheat Variation [K] TDEX 8 TDEX TDEX 2.5 TDEX 6 TDEX 9 Condenser Pressure [bar] 6 DKRCC.PD.AM0.A3.02 / 5H4608

7 Fig. 8 Static superheat variation, TDEB 8-9 (balanced port design Normal flow Static Superheat Variation [K] TDEBX 9 TDEBX 8-6 Condenser Pressure [bar] Static Superheat variation (fig. 7/8 The factory setting of 4 K static superheat (SS is made at 7.5 bar (abs. corresponding to 45 C condensing temperature. Consequently the superheat setting variation is 0 at 7.5 bar, as appears from the diagrams in fig. 7 and 8. In normal flow direction the condensing pressure operates in the opening direction, and consequently SS decreases at values above 7.5 bar and increases at values below 7.5 bar. In biflow condition and with opposite flow direction the situation is reversed. When compared with normal flow direction the SS variation is twice the size. The static superheat is adjustable, and as such it can be adapted to the given condensing pressure to match the factory setting. Terminology (fig. 9 SS = static superheat OS = opening superheat SH = SS + OS = total superheat Example: SS = 4 K Static superheat SS is factory set at 4 K. OS = 4 K Opening superheat is 4 K from the beginning opening to the opening that gives the table. (Nominal. The opening superheat is determined by the construction and cannot be changed. SH = SS + OS = = 8 K Total superheat SH can be changed by changing SS (by using the setting spindle. Fig. 9 DKRCC.PD.AM0.A3.02 / 5H4608 7

8 Ordering The valves and bulb straps are supplied in industrial packs or multipacks: pack, TDE 3-7.5/2-off pack, TDE 8-9/2-off pack, TDE -/8-off Multipack, TDE 3-7.5/2-off Multipack, TDE 8-9/8-off Multipack, TDE -/6-off Program survey Capacity Refrigerant Range Temperature range MOP Ordering R22 K 25 + C MOP 5 C See page 9 R22 AC +5 C MOP C See page 3 - R22 N + C R7C K 25 + C MOP 5 C See page 2 R7C AC +5 C MOP C See page 3 R7C N + C 2 - R34a K 25 + C MOP 5 C Manufactured to order, contact Danfoss R34a N + C Manufactured to order, contact Danfoss MOP valves To avoid charge migration when MOP valves are used, the bulb temperature must be lower than the thermostatic element temperature. MOP-points Range K 25 + C Range AC +5 C Refrigerant MOP point for evaporating temperature t e and evaporating pressure p e t e = +5 C/+60 F t e = C/+68 F R22 0 psig/7 bar psig/8.5 bar R7C 95 psig/6.5 bar 5 psig/8 bar p e in bar gauge 8 DKRCC.PD.AM0.A3.02 / 5H4608

9 Ordering Standard range Range K = 25 + C with MOP 0 psig/8 bar abs. Static superheat SS = 4 K Type and rated Q nom. Rated Q nom. kw in. Inch version Multi pack 2 pack 2 R22/R7C version Multi pack 2 pack 2 TDEX Single port TDEX / 8 5 / 8 068H60 068H H H456 TDEX 3.5 / 2 5 / 8 068H6 068H H H457 TDEX 4 4 / 2 7 / 8 068H62 068H H68 068H458 TDEX 6 2 / 2 5 / 8 068H H H H485 TDEX 6 2 / 2 7 / 8 068H63 068H H69 068H459 TDEX / 8 7 / 8 068H64 068H H62 068H460 TDEX / 8 7 / 8 068H65 068H H62 068H46 TDEX 8-9 Single port TDEX / 8 7 / 8 068H H H H469 TDEX / 8 7 / 8 068H H H62 068H470 TDEX / 8 / 8 068H H H H47 TDEX / 8 7 / 8 068H H H H472 TDEX / 8 / 8 068H H H H473 TDEX / 8 / 8 068H H H H487 TDEX / 8 / 8 068H H H H474 TDEX / 8 / 8 068H H H H475 TDEBX 8-9 Balanced port TDEBX / 8 7 / 8 068H7 068H H73 068H800 TDEBX / 8 7 / 8 068H H H H8003 TDEBX / 8 / 8 068H H H H8005 TDEBX / 8 7 / 8 068H H H H8007 TDEBX / 8 / 8 068H H H H8009 TDEBX / 8 / 8 068H7 068H H74 068H80 TDEBX / 8 / 8 068H H H H803 TDEBX / 8 / 8 068H H H H805 TDEBX - Balanced port TDEBX 70 7 / 8 / 8 068H H H H807 TDEBX / 8 3 / 8 068H H H H809 TDEBX 5 7 / 8 3 / 8 068H7 068H H75 068H802 TDEBX 5 / 8 3 / 8 068H H H H8023 TDEBX / 8 3 / 8 068H H H H8025 The rated is based on: -evaporating temperature t e = 5 C -liquid temperature t l = 28 C -condensing temperature t c = 32 C 2 Number of valves in industrial and multi pack: see Ordering DKRCC.PD.AM0.A3.02 / 5H4608 9

10 Ordering Standard range - continued Range AC = +5 C with MOP psig/9 bar abs. Static superheat SS = 4 K Type and rated Q nom. Rated Q nom. kw in. Inch version Multi pack 2 pack 2 R22/R7C version Multi pack 2 pack 2 TDEX Single port TDEX / 8 5 / 8 068H60 068H 6 068H66 068H46 TDEX 3.5 / 2 5 / 8 068H6 068H H67 068H47 TDEX 4 4 / 2 7 / 8 068H62 068H H68 068H48 TDEX 6 2 / 2 5 / 8 068H H H H435 TDEX 6 2 / 2 7 / 8 068H63 068H H69 068H49 TDEX / 8 7 / 8 068H64 068H H6 068H4 TDEX / 8 7 / 8 068H65 068H H6 068H4 TDEX 8-9 Single port TDEX / 8 7 / 8 068H62 068H H69 068H49 TDEX / 8 7 / 8 068H63 068H H6 068H4 TDEX / 8 / 8 068H64 068H H62 068H42 TDEX / 8 7 / 8 068H65 068H H H422 TDEX / 8 / 8 068H66 068H H H423 TDEX / 8 / 8 068H H H H437 TDEX / 8 / 8 068H67 068H H H424 TDEX / 8 / 8 068H68 068H H H425 TDEBX 8-9 Balanced port TDEBX / 8 7 / 8 068H70 068H H7 068H8027 TDEBX / 8 7 / 8 068H72 068H H73 068H8029 TDEBX / 8 / 8 068H74 068H H75 068H803 TDEBX / 8 7 / 8 068H76 068H H77 068H8033 TDEBX / 8 / 8 068H78 068H H79 068H8035 TDEBX / 8 / 8 068H7 068H H7 068H8037 TDEBX / 8 / 8 068H72 068H H73 068H8039 TDEBX / 8 / 8 068H74 068H H75 068H804 TDEBX - Balanced port TDEBX 70 7 / 8 / 8 068H76 068H H77 068H8043 TDEBX / 8 3 / 8 068H78 068H H79 068H8045 TDEBX 5 7 / 8 3 / 8 068H7 068H H72 068H8047 TDEBX 5 / 8 3 / 8 068H H H H8049 TDEBX / 8 3 / 8 068H H H H805 The rated is based on: -evaporating temperature t e = 5 C -liquid temperature t l = 28 C -condensing temperature t c = 32 C 2 Number of valves in industrial and multi pack: see Ordering DKRCC.PD.AM0.A3.02 / 5H4608

11 Ordering Standard range - continued Range N = + C Static superheat SS = 4 K Type and rated Q nom. Rated Q nom. kw in. Inch version Multi pack 2 pack 2 R22/R7C version Multi pack 2 pack 2 TDEX Single port TDEX / 8 5 / 8 068H70 068H H H8053 TDEX 3.5 / 2 5 / 8 068H H H H8055 TDEX 4 4 / 2 7 / 8 068H H H H8057 TDEX 6 2 / 2 5 / 8 068H H H H8059 TDEX 6 2 / 2 7 / 8 068H H H H806 TDEX / 8 7 / 8 068H H H H8063 TDEX / 8 7 / 8 068H H H H8065 TDEX 8-9 Single port TDEX / 8 7 / 8 068H86 068H H H8067 TDEX / 8 7 / 8 068H88 068H H89 068H8069 TDEX / 8 / 8 068H8 068H H8 068H807 TDEX / 8 7 / 8 068H82 068H H83 068H8073 TDEX / 8 / 8 068H84 068H H85 068H8075 TDEX / 8 / 8 068H86 068H H87 068H8077 TDEX / 8 / 8 068H88 068H H89 068H8079 TDEX / 8 / 8 068H8 068H H82 068H808 TDEBX 8-9 Balanced port TDEBX / 8 7 / 8 068H H H H8083 TDEBX / 8 7 / 8 068H H H H8085 TDEBX / 8 / 8 068H H H H8087 TDEBX / 8 7 / 8 068H H H H8089 TDEBX / 8 / 8 068H H H H809 TDEBX / 8 / 8 068H H H H8093 TDEBX / 8 / 8 068H H H H8095 TDEBX / 8 / 8 068H H H H8097 TDEBX - Balanced port TDEBX 70 7 / 8 / 8 068H H H H8099 TDEBX / 8 3 / 8 068H H H H8 TDEBX 5 7 / 8 3 / 8 068H H H H83 TDEBX 5 / 8 3 / 8 068H H H H85 TDEBX / 8 3 / 8 068H H H H87 The rated is based on: -evaporating temperature t e = 5 C -liquid temperature t l = 28 C -condensing temperature t c = 32 C 2 Number of valves in industrial and multi pack: see Ordering DKRCC.PD.AM0.A3.02 / 5H4608

12 Ordering Standard range - continued Range K = 25 + C with MOP 95 psig/7.5 bar abs. Static superheat SS = 4 K Type and rated Q nom. Rated Q nom. kw in. Inch version Multi pack 2 pack 2 version Multi pack 2 R7C pack 2 TDEZ Single port TDEZ / 8 5 / 8 068H H H H556 TDEZ 3.5 / 2 5 / 8 068H76 068H H H557 TDEZ 4 4 / 2 7 / 8 068H H H H558 TDEZ 6 2 / 2 5 / 8 068H H H H585 TDEZ 6 2 / 2 7 / 8 068H H H H559 TDEZ / 8 7 / 8 068H H H H560 TDEZ / 8 7 / 8 068H H H H56 TDEZ 8-9 Single port TDEZ / 8 7 / 8 068H H H H569 TDEZ / 8 7 / 8 068H H H H570 TDEZ / 8 / 8 068H H H H57 TDEZ / 8 7 / 8 068H H H H572 TDEZ / 8 / 8 068H77 068H H H573 TDEZ / 8 / 8 068H H H H587 TDEZ / 8 / 8 068H H H H574 TDEZ / 8 / 8 068H H H H575 TDEBZ 8-9 Balanced port TDEBZ / 8 7 / 8 068H H H H823 TDEBZ / 8 7 / 8 068H H H H825 TDEBZ / 8 / 8 068H H H H827 TDEBZ / 8 7 / 8 068H78 068H H H829 TDEBZ / 8 / 8 068H H H H83 TDEBZ / 8 / 8 068H H H H833 TDEBZ / 8 / 8 068H H H H835 TDEBZ / 8 / 8 068H H H H837 TDEBZ - Balanced port TDEBZ 70 7 / 8 / 8 068H79 068H H H839 TDEBZ / 8 3 / 8 068H H H H84 TDEBZ 5 7 / 8 3 / 8 068H H H H843 TDEBZ 5 / 8 3 / 8 068H H H H845 TDEBZ / 8 3 / 8 068H H H70 068H847 The rated is based on: -evaporating temperature t e = 5 C -liquid temperature t l = 28 C -condensing temperature t c = 32 C 2 Number of valves in industrial and multi pack: see Ordering 2 DKRCC.PD.AM0.A3.02 / 5H4608

13 Ordering Standard range - continued Range AC = +5 C with MOP 5 psig/9 bar abs. Static superheat SS = 4 K Type and rated Q nom. Rated Q nom. kw in. Inch version Multi pack 2 pack 2 version Multi pack 2 R7C pack 2 TDEZ Single port TDEZ / 8 5 / 8 068H72 068H H H849 TDEZ 3.5 / 2 5 / 8 068H H H H85 TDEZ 4 4 / 2 7 / 8 068H H H H853 TDEZ 6 2 / 2 5 / 8 068H H H H855 TDEZ 6 2 / 2 7 / 8 068H H H H857 TDEZ / 8 7 / 8 068H H H H859 TDEZ / 8 7 / 8 068H H H H86 TDEZ 8-9 Single port TDEZ / 8 7 / 8 068H H H H863 TDEZ / 8 7 / 8 068H H H H865 TDEZ / 8 / 8 068H H H H867 TDEZ / 8 7 / 8 068H72 068H H H869 TDEZ / 8 / 8 068H H H H87 TDEZ / 8 / 8 068H H H H873 TDEZ / 8 / 8 068H H H H875 TDEZ / 8 / 8 068H H H H877 TDEBZ 8-9 Balanced port TDEBZ / 8 7 / 8 068H H H H879 TDEBZ / 8 7 / 8 068H H H H88 TDEBZ / 8 / 8 068H H H72 068H883 TDEBZ / 8 7 / 8 068H H H H885 TDEBZ / 8 / 8 068H H H H887 TDEBZ / 8 / 8 068H H H H889 TDEBZ / 8 / 8 068H H H H89 TDEBZ / 8 / 8 068H H H72 068H893 TDEBZ - Balanced port TDEBZ 70 7 / 8 / 8 068H H H H895 TDEBZ / 8 3 / 8 068H H H H897 TDEBZ 5 7 / 8 3 / 8 068H H H H899 TDEBZ 5 / 8 3 / 8 068H H H H8 TDEBZ / 8 3 / 8 068H H H H83 The rated is based on: -evaporating temperature t e = 5 C -liquid temperature t l = 28 C -condensing temperature t c = 32 C 2 Number of valves in industrial and multi pack: see Ordering DKRCC.PD.AM0.A3.02 / 5H4608 3

14 Ordering Standard range - continued Range N = + C Static superheat SS = 4 K Type and rated Q nom. Rated Q nom. kw in. Inch version Multi pack 2 pack 2 version Multi pack 2 R7C pack 2 TDEZ Single port TDEZ / 8 5 / 8 068H H H H85 TDEZ 3.5 / 2 5 / 8 068H H H H87 TDEZ 4 4 / 2 7 / 8 068H H H H89 TDEZ 6 2 / 2 5 / 8 068H H H H82 TDEZ 6 2 / 2 7 / 8 068H H H H823 TDEZ / 8 7 / 8 068H70 068H H70 068H825 TDEZ / 8 7 / 8 068H H H H827 TDEZ 8-9 Single port TDEZ / 8 7 / 8 068H H H H829 TDEZ / 8 7 / 8 068H H H H822 TDEZ / 8 / 8 068H H H H8223 TDEZ / 8 7 / 8 068H H H H8225 TDEZ / 8 / 8 068H H H H8227 TDEZ / 8 / 8 068H H H H8229 TDEZ / 8 / 8 068H H H H823 TDEZ / 8 / 8 068H H H H8233 TDEBZ 8-9 Balanced port TDEBZ / 8 7 / 8 068H H H H8235 TDEBZ / 8 7 / 8 068H H H H8237 TDEBZ / 8 / 8 068H H H H8239 TDEBZ / 8 7 / 8 068H70 068H H H824 TDEBZ / 8 / 8 068H H H H8243 TDEBZ / 8 / 8 068H H H H8245 TDEBZ / 8 / 8 068H H H H8247 TDEBZ / 8 / 8 068H H H H8249 TDEBZ - Balanced port TDEBZ 70 7 / 8 / 8 068H70 068H H H825 TDEBZ / 8 3 / 8 068H H H H8253 TDEBZ 5 7 / 8 3 / 8 068H H H H8255 TDEBZ 5 / 8 3 / 8 068H H H H8257 TDEBZ / 8 3 / 8 068H H H H8259 The rated is based on: -evaporating temperature t e = 5 C -liquid temperature t l = 28 C -condensing temperature t c = 32 C 2 Number of valves in industrial and multi pack: see Ordering 4 DKRCC.PD.AM0.A3.02 / 5H4608

15 Capacity Capacity in kw Type and rated Q nom TDEX 3 TDEX 4 TDEX 6 TDEX 7.5 TDEX 8 TDEX TDEX 2.5 TDEX 6 TDEX 9 TDEX TDEX 26 TDEX TDEX TDEX 3 TDEX 4 TDEX 6 TDEX 7.5 TDEX 8 TDEX TDEX 2.5 TDEX 6 TDEX 9 TDEX TDEX 26 TDEX TDEX TDEX 3 TDEX 4 TDEX 6 TDEX 7.5 TDEX 8 TDEX TDEX 2.5 TDEX 6 TDEX 9 TDEX TDEX 26 TDEX TDEX TDEX 3 TDEX 4 TDEX 6 TDEX 7.5 TDEX 8 TDEX TDEX 2.5 TDEX 6 TDEX 9 TDEX TDEX 26 TDEX TDEX Orifice no. Pressure drop across the valve p bar Pressure drop across the valve p bar R Evaporating temperature +5 C Evaporating temperature + C Evaporating temperature +5 C Evaporating temperature 0 C Evaporating temperature 5 C Evaporating temperature 5 C Evaporating temperature C Evaporating temperature C DKRCC.PD.AM0.A3.02 / 5H4608 5

16 Capacity Capacity in kw Type and rated Q nom TDEX 3 TDEX 4 TDEX 6 TDEX 7.5 TDEX 8 TDEX TDEX 2.5 TDEX 6 TDEX 9 TDEX TDEX 26 TDEX TDEX TDEX 3 TDEX 4 TDEX 6 TDEX 7.5 TDEX 8 TDEX TDEX 2.5 TDEX 6 TDEX 9 TDEX TDEX 26 TDEX TDEX Orifice no. Pressure drop across the valve p bar Pressure drop across the valve p bar R Evaporating temperature 25 C Evaporating temperature C Evaporating temperature 35 C Evaporating temperature C Correction for subcooling t sub The evaporator used must be corrected if the subcooling deviates from 4 K. The corrected can be obtained by dividing the required evaporator by the correction factor given across, and then selecting from the tables. t sub 4 K K 5 K K 25 K K Correction factor Note: Flash gas can form if subcooling is too low. 6 DKRCC.PD.AM0.A3.02 / 5H4608

17 Capacity Capacity in kw Type and rated Q nom TDEZ 3 TDEZ 4 TDEZ 6 TDEZ 7.5 TDEZ 8 TDEZ TDEZ 2.5 TDEZ 6 TDEZ 9 TDEZ TDEZ 26 TDEZ TDEZ TDEZ 3 TDEZ 4 TDEZ 6 TDEZ 7.5 TDEZ 8 TDEZ TDEZ 2.5 TDEZ 6 TDEZ 9 TDEZ TDEZ 26 TDEZ TDEZ TDEZ 3 TDEZ 4 TDEZ 6 TDEZ 7.5 TDEZ 8 TDEZ TDEZ 2.5 TDEZ 6 TDEZ 9 TDEZ TDEZ 26 TDEZ TDEZ TDEZ 3 TDEZ 4 TDEZ 6 TDEZ 7.5 TDEZ 8 TDEZ TDEZ 2.5 TDEZ 6 TDEZ 9 TDEZ TDEZ 26 TDEZ TDEZ Orifice no. Pressure drop across the valve p bar Pressure drop across the valve p bar R7C Evaporating temperature +5 C Evaporating temperature + C Evaporating temperature +5 C Evaporating temperature 0 C Evaporating temperature 5 C Evaporating temperature 5 C Evaporating temperature C Evaporating temperature C DKRCC.PD.AM0.A3.02 / 5H4608 7

18 Capacity Capacity in kw Type and rated Q nom TDEZ 3 TDEZ 4 TDEZ 6 TDEZ 7.5 TDEZ 8 TDEZ TDEZ 2.5 TDEZ 6 TDEZ 9 TDEZ TDEZ 26 TDEZ TDEZ TDEZ 3 TDEZ 4 TDEZ 6 TDEZ 7.5 TDEZ 8 TDEZ TDEZ 2.5 TDEZ 6 TDEZ 9 TDEZ TDEZ 26 TDEZ TDEZ Orifice no. Pressure drop across the valve p bar Pressure drop across the valve p bar R7C Evaporating temperature 25 C Evaporating temperature C Evaporating temperature 35 C Evaporating temperature C Correction for subcooling t sub The evaporator used must be corrected if the subcooling deviates from 4 K. The corrected can be obtained by dividing the required evaporator by the correction factor given across, and then selecting from the tables. t sub 4 K K 5 K K 25 K K Correction factor Note: Flash gas can form if subcooling is too low. 8 DKRCC.PD.AM0.A3.02 / 5H4608

19 Sizing p e ~t e EVR Q e SGI/SGN DCL/DML Fig. Sizing example Refrigerant R22 Evaporator Q e = kw Evaporator with several sections, i.e. a valve with distributor is required Evaporating temperature t e = 0 C p e = 4 bar Condensing temperature t c = +36 C p c = 3 bar Refrigrant liquid temperature t l = +26 C Subcooling tsub = = K From the diagram it can be seen that evaporating pressure p e is equal to p c p p p 2. Thus, pressure drop p in TDE equals p c p e p p 2 = = 8 bar. Pressure drop in risers, etc. is not taken into account. The correction factor at t sub = K is.07. The corrected evaporator thus becomes divided by.07 = 8.7 kw Capacity in kw Type and rated Qnom TDEX 3 TDEX 4 TDEX 6 TDEX 7.5 TDEX 8 TDEX TDEX 2.5 TDEX 6 TDEX 9 TDEX TDEX 26 TDEX TDEX Orifice no. From the data supplied determine pressure drop p in TDE. Pressure drop p in liquid lines, pipe bends, filter, sight glass, solenoid valve, etc. can be assumed to be 0.5 bar. Pressure drop p 2 in the liquid distributor can also be assumed as 0.5 bar. Pressure drop across the valve p bar Since the of the expansion valve must be equal to or slightly higher than the corrected evaporator of 8.7 kw, a TDEX 6 giving. kw would be a suitable choice (See example below. Pressure drop across the valve p bar R Evaporating temperature +5 C Evaporating temperature 0 C DKRCC.PD.AM0.A3.02 / 5H4608 9

20 Technical leaflet Dimensions and weights TDE 3-7.5, 8-9 TDE - Fig. Type inlet outlet ODF solder Capillary tube length H H2 H3 H4 L L2 L3 L4 L5 ØD ØD2 Weight m kg /8 5/8 6 3 TDE /2 5/8 2 6 /2 7/ /8 7/ /8 7/ TDE 8-9 /8 / /8 / /8 / TDE - /8 / /8 / DKRCC.PD.AM0.A3.02 / 5H923 5H Produced by gadvertising JUL