^ «r 



'L^. 



NUT ' 

 WASHER - 5 



Figure 3. — One-hp single-pliase cunipressor and con- 

 densing unit (12,000 BTU factory rated) attached to 

 a PVC chilling tank and mounted on angle iron stand. 

 A. vibration joint; B. expansion valve; C. thermostat 

 control; D. compressor; E. sight glass; F. dryer; H. 

 condensing unit; J. chilling tank; K. angle iron stand. 



place, the table tojj serves as a work area for 

 staining and tagging shrimp which are held in 

 the pans. 



Equipment for Releasing Shrimp 



Three types of release devices have been de- 

 veloped to protect shrimp from exposure to pre- 

 dation during their return to the sea floor. Cos- 

 tello (1964) described a release box that is low- 

 ered to the bottom with a winch and opened by 



Figure 5. — Reduction of water temperatures in a 1,892- 

 liter (500-gal) tank compared to surrounding air tem- 

 peratures during trials with the chilling unit. 



£ ALUMINUM SUPPORT 



COIL INLET 



STAINLESS STEEL 

 ROD- 



2S4 CM PVC PIPE— - 

 (10 IN I 



PVC TOP PLATE 



STAINLESS STEEL ROO 



PVC BOTTOM PLATE 



/ 



FlGiniE 4. — Details of the chilling tank assembly. 



— 1 — I — I — r- 



249 



