Nashua Waste Water Treatment Facility - Energy Recovery Generator Upgrade
Engineering Design Services
A
li. Description of Work and Approach to RFQ (Rev.2)
In response to the RFQ, Waldron has structured a Scope of Work and approach that
includes all aspects of the RFQ Scope. Our team has a strong knowledge base for the recip
engine CHP as well as digester gas system design and operation. This allows our team to
provide detailed accurate design information from the start. In particular, our approach is
to work with the facility to develop a design that not only allows for the installation of the
CHP but to make decisions early in the process to avoid delays and problems throughout
the design, installation and startup phases. We will work with all parties to develop a
design that will result in the optimal life cycle economics and greenhouse gas impact.
Project Description
The main intent of the project is to replace the existing 380 kW Waukesha Engine CHP with
2 CAT G3406 200kW engines generators and it auxiliary equipment so that the CHP can
fully utilize the digester gas production to maximize the economic outcome. The main
project scopes are:
1. To replace the existing Waukesha 380 kW cogen generators with 2 CAT G3406
200kW Model recip engine generator and hot water heat exchangers between the
cogen building and digester and other auxiliary equipment associated with the
engine generators. Evaluate potential options to increase digester gas production.
2. Evaluate the most economical cogeneration generator size that is capable to utilize
all the digester gas produced. Two cogeneration generators will be the prefer
option for redundancy.
3. The two new cogeneration generators and auxiliary equipment will be fitted in the
existing Energy Recover Building with proper egress.
4. Evaluate capacity of piping size, digester gas production that allows the 2 new cogen
generators to operate in full capacity, boiler capacity to heat the digester sludge,
equipment capacity in gas cleansing room, gas flare capacity and gas holding tank
system capacity.
Revised August 28, 2017
WALDRON
