Nationwide Boiler receives progress update reports via email from the Department of Energy's (DOE's) Office of Energy Efficiency & Renewable Energy (EERE). Over the last few weeks the department has been busy promoting aggressive actions to promote new initiatives that they hope will save consumers money and create new jobs.
Boiler Blog | Nationwide Boiler Inc.
Even with the best pretreatment programs, boiler feedwater often contains some degree of impurities, such as suspended and dissolved solids. The impurities can remain and accumulate inside the boiler as the boiler operation continue, leading to carryover of boiler water into the steam, causing damage to piping, steam traps and even process equipment. The increasing concentration of suspended solids can form sludge, which impairs boiler efficiency and heat transfer capability.
One way to improve efficiency is to review your blowdown practices. This includes the use of an automatic blowdown control system by regulating water volume discharged in relation to the amount of dissolved solids present. This system maintains proper water chemistry within acceptable limits, while minimizing blowdown and reducing energy losses. Cost savings come from the significant reduction in the consumption, disposal, treatment, and heating of water.
The U.S. Department of Energy's Industrial Technologies Program calculated annual cost savings associated with the installation of an automatic blowdown control system that reduced blowdown rate from 8% to 6%. The example below assumes a continuously operating natural gas-fired, 150 psig, and 100,000 lb/hr steam boiler. Makeup water temperature of 60 degrees, with boiler efficiency of 83%, with fuel valued at $3.00 MMBTU was used, and the total water, sewage and treatment costs are $0.004 per gallon.
The annual cost savings in the example above equals:
Initial = 100,000 / (1-0.08) = 108,695 lbs/hr
Final = 100,000 / (1-0.060 = 106,383 lbs/hr
Makeup Water Savings = Initial - Final, or 108,695 lbs/hr - 106,383 lbs/hr = 2,312 lbs/hr
Enthalpy of boiler water = 338.5 Btu/lb; for makeup water at 60 degrees = 28 Btu/lb
Thermal Energy Savings = 338.5 - 28= 310.0 Btu/lb
Annual Fuel Savings = 2,312 lbs/hr x 8760 hrs/yr x 310.5 Btu/lb x $3.00/MMBtu / 0.82 x 106 = $23,007
Annual Water and Chemical Savings = 2,312 lbs/hr x 8760 hrs/yr x $0.004/gal / 8.34 lbs/gal = $9,714
Annual Cost Savings = $23,007 + $9,714 = $32,721
If you need additional information about feedwater systems or other ways you can decrease costs, contact Nationwide Boiler today and we are happy to discuss ways to improve your bottom line: 1-800-227-1966.
The U.S. Department of Energy (DOE) Industrial Technologies Program (ITP) offers no-cost webcasts to help industrial companies improve energy efficiency. This is achieved through an understanding of current and future technologies, ITP tools, energy assessments and utilizing industry wide best practices. Past subjects include the following: Energy Assessments: What are the Benefits to Small and Medium Sized Facilities, State and Utility Partnerships, Super Boiler Technologies and Using Wireless Technology to Reduce Facility Energy Usage.
Webcasts are offered on Thursdays from 1:00 to 2:00 pm (Eastern Time) and they are a convenient and cost-effective way to learn how you can improve your operations and energy use.
Nationwide Boiler has helped many of our customers realize positive gains through energy efficiency upgrades with a quick return on investment. Give us a call today so we can better understand your needs and can present a solution that's right for you 800-227-1966.
Upcoming webcast sessions:
- March 12, 2009 â€” Steam System Tool Suite
Find out how to use DOE's suite of tools for evaluating and identifying steam system improvements in your facility.
- March 19, 2009 â€” MotorMaster+ Tool
See how this energy-efficient motor selection and management tool can help you analyze, identify, and report on energy savings.
- March 26, 2009 â€” ITP Nanotechnology Research and Development
Learn about ITP R&D nanotechnology activities and the direction of future research and application of this technology in a variety of industries.
- April 2, 2009 â€” ITP's Top Low- or No-Cost Improvements
Get tips for identifying and implementing energy efficiency improvements based on frequent recommendations from DOE Energy Experts.
- April 9, 2009 â€” Project Financing â€” From Identification to Implementation
Ensure that improvement measures identified during energy assessments become reality by exploring effective funding mechanisms in this Webcast.
- April 16, 2009 â€” Energy Assessment Results - Most Commonly Identified Recommendations
Hear from DOE Energy Experts about the most common recommendations for cost and energy savings identified during an assessment.
- April 23, 2009 â€” Data Center Assessment Case Studies â€” Verizon and Lucasfilm
Discover energy efficiency recommendations and best practices identified during DOE data center energy assessments at Verizon and Lucasfilm.