Patch Services is participating in a number of Solar Thermal and Solar Photovoltaic Electrical Generating Projects in the United States. These Projects range in size from a 5MW Solar Thermal Project, to a 220MW Photovoltaic Project, to a large 650MW Solar Thermal Project.

Providing engineering and technical support to the Projects, Patch Services responsibilities range from the conceptual and preliminary engineering required to support Project permitting and Licensing requirements, to detailed engineering and the Issuing for Construction documents required for Construction Management services.

The typical engineer and technical support provided in the licensing phase of the Project includes both conceptual engineering design as well as preliminary engineering design. Responsible for the development and preparation of the Project Description, which forms the Design Basis for the Project, the following engineering control documents are developed and included in the Licensing Applications:

  • Development of the heat and mass balance
  • Process flow diagrams, Water Balance and Equipment Data Sheets
  • Selection of the Steam Turbine, Air Cooled Condensers, Feed Water Pumps, Water Treatment System, Tankage and other major mechanical equipment;
  • General Arrangements for the Solar Field and the Power Block
  • Site Grading and Drainage Plan
  • Develop the Project’s Engineering, Procurement and Construction Schedule
  • Preparation of the Transmission Application for Interconnection to the CAISO
  • Electrical Single-Line
  • Process Control Narrative
  • Coordination with Local Engineer Agencies including the Local Fire Marshall
  • Preparation of discipline Specifications required for the Project
  • Participating in all phases for the California Energy Commission’s Licensing process


Detailed Engineering is currently being provided for a 5MW Solar Thermal proof of concept, demonstration, and operations training Facility. This Solar Electrical Generating Facility incorporates appropriate technology that has the potential of significantly reducing the current cost of Solar electrical generation. Engineering services being provided to this ground breaking Project includes:

  • Process Engineering including development of the heat balances, PFD’s, P&ID’s, Water Balance
  • Equipment Data Sheets, technical support required during bidding and evaluation of suppliers quotations
  • Process Controls definition including block diagrams, loopsheets, control logics, writing the PLC software, developing the Wonderwear HMI screens, integration of the reflector controls with the Facility’s control system
  • Electrical Single-Line, MCC Specification, raceway layouts, cable and conduit schedules, grounding design
  • Concrete foundations for all Equipment, Receiver, Reflector, pipe rack, pipe and electrical supports and buildings
  • Structural Steel design for the elevated equipment, pipe and raceway racks, miscellaneous pipe and electrical supports
  • Detailed piping design
  • Pipe and valve specifications
  • Pipe stress analysis and design of engineered pipe supports
  • Preparation of bid documents for equipment and material
  • Technical Evaluation of vendor proposals and vendor recommendations
  • Review of vendor technical submittals
  • Coordination with the Owner and Contractor




Patch Services is committed to the renewable sector of energy generation. Biomass involvement is one of the many approaches in which we demonstrate our commitment to developing innovative and economically successful projects for the generation of clean renewable energy.

Patch Services is participating in various Biomass Projects throughout the United States. These projects range in size from 3MW to 10MW. Patch Services is completing all of the engineering services required to design and construct each Facility. For these Projects, Patch Services is providing:

  • Overall Design and Construction Details
  • Development of the heat and mass balances
  • Process Flow Diagrams and Equipment Data Sheets
  • Selection of the Steam Turbines, Fuel Silos, Fuel Handling Conveyors, Boilers, Condensers as well as other major mechanical equipment
  • Specified components of the engineered equipment and provided process control integration
  • Developed Logic and Schedule for Project Management and Completion
  • Preparation of Electrical Interconnection Applications
  • Preparation of the Electrical Single-Line
  • Preparation of discipline Specifications required




Patch Services has multi-partnering relationships with several entities providing true R&D efforts for the generation of clean energy. These partners include DOE, Mirant, Clean Energy Systems (CES), Air Liquide, and the California Energy Commission. One such project includes CES who is in the process of developing a truly unique and innovative technology for the production of steam to drive a steam turbine and capture commercial grade CO2. In 2001, Patch Services and CES presented two technical papers at Power-Gen.

Patch Services responsibilities in this revolutionary project include:

  • Development of the PFD’s
  • Development of the P&ID’s
  • Equipment selection necessary to support CES’s proprietary Gas Generator
  • Detailed engineering required to construct 500KW Pilot Plant


Based on bench test results, CES determined that the Gas Generator required for the 500KW steam turbine-generator was fully capable of driving a 5MW steam turbine-generator. Currently, we are in discussions with CES and are addressing the opportunity of supporting CES’s continuing efforts at their Facility in Bakersfield, California.