Retrotec USACE - Manual (Page 265)

Appendix D D135
D.7.10.6 Ineffi cient Deep Fat Fryer (Ineffi ciency)
Figure D222. Deep fat fryers: low effi ciency natural gas (above), Energy Star rated (right).
Poor heat exchanger and burner design make for poor performing deep fat
fryers. These poor design elements result in not only high idle energy rates
and low cooking energy effi ciency, but poor cooked food quality as well. Natu-
ral gas Energy Star fryers have cooking energy effi ciencies of more than 50%
and can use less than half the energy of ineffi cient fryers during idle periods
(Figure D222). Quick oil temperature recovery yields superior fi nished food
product and high production capacity. Potential annual operating cost savings
range between $200 and $500 with 18 hr/day operation.
D.7.10.7 Ineffi cient Steamer (Ineffi ciency)
Figure D223. Low-effi ciency, water-intensive steamer (left), Energy Star boilerless steamer
(right).
Countertop, boiler-based steamers are energy- and water-intensive. A typical
boiler-based model can use up to 151.416 L/hr (40 gal/hr) and have cooking