Final Report

Executive Summary

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This final report looks at two depths evaluated for the Surly Destination Brewery. The 
first depth’s goal was to identify opportunities to recover energy and reduce the consumption 
of the facility without compromising the operations. Upon review of the brewing process, an 
obvious and relatively cheap adjustment could be made. Placement of two heat exchangers 
following the boil yielded many positives. Free cooling and preheating were achieved 
concurrently; cooling of the wort (unfermented beer) and preheating liquor (batch water). 
Thus, reduced preheating load on the boilers and lower cooling load on the chillers. This depth 
also looks briefly at using heat exchangers crossing the exhausts and outside air intakes on the 
air handlers to reduce heating and cooling coil loads.  
 

The second depth investigates using a combined heat and power system (CHP) to supply 
heat and electricity to the brewery. The goal of this depth was to design a CHP system that can 
support the operations of the brewery while still being economical. A reciprocating engine and 
a microturbine were evaluated as the CHP primary movers. Various factors were used to 
evaluate these two systems as well as the standard heat and power system (SHP) currently 
supporting the operations of the facility. It was determined that a 200 kW microturbine was the 
best option.  
 

Further development of the CHP depth was supported by electrical and acoustical 
considerations. These breadths continued to look at effects on the operation of the facility. The 
electrical breadth looked at the connections between the combined heat and power system, 
the building, and the utility. Loads were also identified to evaluate if the facility could maintain 
operation during utility power outages. The acoustical breadth evaluated potential acoustical 
issues that may arise through the CHP system placement onsite. 

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