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Finalized Residential Water Heater Standards Have Strong Industry and Stakeholder Support, Will Accelerate the Deployment of Heat Pump Water Heaters, and Represent Largest Energy Savings Action by the Appliance Standards Program in History

WASHINGTON, D.C. — The U.S. Department of Energy (DOE) today finalized Congressionally-mandated energy-efficiency standards for a range of residential water heaters to save American households approximately $7.6 billion per year on their energy and water bills, while significantly cutting energy waste and harmful carbon pollution. The final standards for residential water heaters align with recommendations from various stakeholders, including efficiency and environmental advocates, the Consumer Federation of America, and a leading U.S. water heater manufacturer. The standards would require the most common-sized electric water heaters to achieve efficiency gains with heat pump technology, helping to accelerate the deployment of this cost-effective, clean energy technology while also reducing strain on the electric grid. Over 30 years of shipments, these updated standards are expected to save Americans $124 billion on their energy bills and reduce 332 million metric tons of dangerous carbon dioxide emissions—equivalent to the combined annual emissions of nearly 43 million homes. 

“Almost every U.S. household has a water heater, and for too long outdated energy efficiency standards have led to higher utility bills for families,” said U.S. Secretary of Energy Jennifer M. Granholm. “The Biden-Harris Administration is continuing to put American consumers first with new, effective rules—supported by industry—that save both energy and money.” 

DOE last updated residential water heater efficiency standards, which are required by Congress, in 2010. Compliance will be required starting in 2029 for the new standards adopted today, which would result in over 50% of the newly manufactured electric storage water heaters to utilize heat pump technology, compared to 3% today. Replacing common-sized traditional electric resistance storage water heaters with electric heat pump water heaters meeting the new standards would save consumers approximately $1,800 on their utility bills, on average, over the life of the appliance, with total savings helping low-income households, who spend a higher percentage of their income on utility bills in particular.

Water heating is responsible for roughly 13% of both annual residential energy use and consumer utility costs, and these new standards will provide a savings of 10% of this usage relative to products currently on the market. The energy savings from this final rule over 30 years of shipments is 17.6 quadrillion British thermal units—the largest savings ever from a single DOE efficiency standard, representing more than the energy use of the entire U.S. residential building sector in a single year.  

The amended standards for electric storage water heaters in the most common sizes reflect the efficiency level of an entry-level heat pump storage water heater. These standards will more than double the efficiency of electric storage water heaters relative to today, while allowing for new product innovation in the heat pump water heating market such as the recently introduced 120-V heat pump water heater. DOE is confident in the industry’s ability to ramp up capacity to produce the volumes necessary to support the heat pump water heating market that will be required by the amended standards, as demonstrated by a major manufacturer signing on to the joint stakeholder recommendation. 

The amended standards represent a moderate increase in efficiency for gas-fired, oil-fired and larger electric storage water heaters. DOE is still considering amended standards for gas-fired instantaneous water heaters, which are not addressed by today’s final rule.   

Strengthening Congressionally-Mandated Energy Efficiency Standards for Appliances   DOE continues to carry out Congressional mandates for energy savings that maintain reliability and performance across household appliances and commercial and industrial equipment. Today’s actions are part of a suite of energy efficiency standards advanced by the Biden-Harris Administration this term that DOE projects will together provide nearly $1 trillion in consumer savings over 30 years and save the average family at least $100 a year through lower utility bills. DOE also estimates that these standards, once finalized, will cumulatively reduce greenhouse gas emissions by 2.5 billion metric tons or more—an amount roughly equivalent to the emissions of 18 million gas-powered cars, 22 coal-fired power plants, or 10.5 million homes over 30 years. 

These actions reinforce the trajectory of consumer savings that form a key pillar of President Biden’s Investing in America agenda and while lowering costs for American families and businesses. 

Lowering Energy Costs for American Families and Businesses  President Biden’s Inflation Reduction Act also expands the accessibility and increases affordability of heat pump water heaters through tax credits, rebates, and other incentives, making it easier for families across the nation to switch to a more efficient model when deciding to replace a water heater—and benefit from years of utility bill savings as a result. 

For more information on cost-savings resources, consumers can utilize DOE’s Energy Savings Hub —an easy-to-use online resource consumers can use to access the cost-saving benefits of President Biden’s Investing in America agenda . The website outlines clean energy tax credits and forthcoming rebates, helping people take control of their energy costs and have cleaner and more efficient options as a consumer—whether they’re looking to purchase an electric vehicle, update an appliance, or make their home safer and more comfortable. To learn how you can drastically cut your energy bills and keep money in your pocket, visit www.energy.gov/save.   

DOE’s Building Technologies Office implements minimum energy conservation standards for more than 60 categories of appliances and equipment. To learn more, visit the Appliance and Equipment Standards Program homepage . 

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SOLAR WATER HEATING.

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Presentation on theme: "SOLAR WATER HEATING."— Presentation transcript:

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Water Heating System Design 101

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This educational presentation provides an introduction to the design of domestic hot water systems with a comprehensive focus on water heaters and related components. The presentation will review the various types of water heater systems, the adjacent components and accessories, and how the system flows and fits together.  The primary considerations for applications and sizing will also be discussed with examples. Participants will learn how best to evaluate an application and choose the proper water heating system based on the specific parameters of a project. 

Content Outline:

• Types of Water Heating Systems Overview – 25 minutes
• Water Heating Components and Accessories Overview – 10 minutes
• Application Parameters Affecting Domestic Hot Water System Design – 10 minutes
• Hands-On Sizing Examples – 15 minutes

Upon successful completion of the course learners will be able to:

• Identify the various types of DHW systems
• Explain the pros and cons of each type of DHW system
• Describe the common components and accessories in a DHW system and their utility
• Explain the factors involved when determining the right type of water heater for an application
• Understand the relevant factors for sizing a DHW system and be able to apply them

This webinar is free for ASPE members due to the generous sponsorship of A.O. Smith.

Isaac Wilson

Product support manager.

Isaac has been working in water heating technology for nearly 4 years with A.O. Smith . He is currently the Product Support Manager and is responsible for all pre-sales technical support for both commercial and residential products, which includes the Application Engineering Team. He has taught numerous educational courses over his career and has extensive knowledge in both product/system design and application engineering. He received his bachelor’s degree in Mechanical Engineering from the University of Louisville in May, 2012.

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Solar Water Heating

Jul 10, 2014

230 likes | 559 Views

Solar Water Heating . A renewable energy resource that consists of transmitting solar energy into heat energy to warm water. Difference between SWH and SPV. Solar photovoltaic Converts sunlight into electricity Only 20% of the energy is converted into electricity

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Presentation Transcript

Solar Water Heating A renewable energy resource that consists of transmitting solar energy into heat energy to warm water.

Difference between SWH and SPV • Solar photovoltaic • Converts sunlight into electricity • Only 20% of the energy is converted into electricity • Produces 15,000 megawatts worldwide • Solar water heating • Direct heating of water usage by solar heat • Heat is stored in tanks for day/night use • 60% of the energy is converted in heat energy • Produces 450,000 megawatts worldwide

The heating system • There are dominant heating systems, which include: • ACTIVE • Direct and Indirect • PASSIVE • Integral and thermosyphon

How it works - Active Pumps heat transfer fluid through collector s to heat exchanger.

Step 1 • A pump circulates water or HTF between the collector and the tank. • The direction in which water is circulated is anti-clockwise if direct system is utilized.

Step 2 • The pump will only pump water when the water in the collector is warmer than the water in the storage tank. • A controller is used to turn the pump on and off.

Step 3 • As the collector retrieves light energy, this energy is transformed to heat energy in the collector which then heats the water making it warmer, as a result the controller signals pumper to pump water to tank. • This thermal energy is transported to tank where it is stored for consumer. …And there you go! Your hot water bath awaits!

How it works - Passive Here the tank acts as both a collector and storage tank.

Passive Heating System This is seldom used as it is more pricey. The dominant difference between the passive and active is the fact that the passive system has a two in one. The tank is its collector as well as storage.

The calculation of long term cost and payback period for a household SWH system depends on a number of factors. Some of these are: • Price of purchasing solar water heater (more complex systems are more expensive) • Efficiency of SWH system purchased • Installation cost • State or government subsidy for installation of a solar water heater • Price of electricity per kW.h • Number of kW.h of electricity used per month by a household • Annual tax rebates or subsidy for using renewable energy • Annual maintenance cost of SWH system • Savings in annual maintenenance of conventional (electric/gas/oil) water heating system Costs & World Usage

Impact on environment • No daily impact on environment as the fuel is the sun; a renewable resource. • The construction of the devices utilized, obviously impacts the environment negatively. Mining has to occur to retrieve components. Reliability • It is reasonably reliable in places that are located near line of Equator, such as: North of Brazil, Egypt, Indonesia and so forth. • It is evident that it isn`t a reliable source at night time specifically and in Autumn and Winter seasons. • This problem has, however, been overcome by storing it when resource is available. This energy resource is improved throughout the years….

Thank you • Your attendance is much appreciated!!!

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