stats FreshPatents Stats
2 views for this patent on
2012: 2 views
Updated: April 14 2014
newTOP 200 Companies filing patents this week

    Free Services  

  • Enter keywords & we'll notify you when a new patent matches your request (weekly update).

  • Save & organize patents so you can view them later.

  • RSS rss
  • Create custom RSS feeds. Track keywords without receiving email.

  • View the last few months of your Keyword emails.

  • Patents sorted by company.


Follow us on Twitter
twitter icon@FreshPatents

Integrated energy recovery systems

last patentdownload pdfdownload imgimage previewnext patent

20120292008 patent thumbnailZoom

Integrated energy recovery systems

An energy efficient laundry facility comprises a space heating system, an air conditioning system, a plurality of clothes washers, a plurality of clothes dryers, a hot water storage tank supplying the washers, a source of cold water and conduit means interconnecting the aforesaid. Dedicated heat recovery units are associated respectively with the dryers and employ high temperature dryer exhaust air to heat water for supply to the storage tank. A controller and temperature sensing means regulate the flow of hot water from the dryers to the storage tank. High temperature water is directed to the top of the storage tank and lower temperature water to an intermediate point in the storage tank. Hot water from the dryers is also directed to the space heating system. Each heat recovery unit comprises a heat exchanger, a blower, a water circulation pump, a water temperature sensor, and a dedicated controller. The controller may also include a dryer exhaust pressure monitor, a pressure controller, and a variable speed blower drive. The heat exchanger is of the counterflow type and each recovery unit has its heat exchanger and blower arranged to provide for right angle air flow resulting in a compact unit for mounting atop a clothes dryer. Hot water may also be drawn from the storage tank for use in either an air or hydronic space heating system.

Inventor: Michael Goldberg
USPTO Applicaton #: #20120292008 - Class: 165287 (USPTO) - 11/22/12 - Class 165 
Heat Exchange > With Timer, Programmer, Time Delay, Or Condition Responsive Control >Temperature Responsive Or Control

view organizer monitor keywords

The Patent Description & Claims data below is from USPTO Patent Application 20120292008, Integrated energy recovery systems.

last patentpdficondownload pdfimage previewnext patent


Reference is had to Provisional Patent Application entitled Integrated Energy Recovery Systems, inventor Michael Goldberg, filed Jun. 18, 2009, hereby incorporated herein by reference.


Energy cost and availability are currently forefront issues well known to all. Research and investment are focused intensely on many facets of this dilemma, and much is being accomplished. In many industries, energy recovery is a key area of development. Typically, unused process heat that has historically been vented to the atmosphere or discharged into waterways, is now being captured. The captured heat may be used to preheat a target process and reduce energy consumption, or it may be used as the source heat for other processes in the same facility.

While heat recovery is an elegant way to reduce energy consumption, it can only work where the waste heat is discharged at sufficient temperature to be useful. It is also essential that the beneficiary process consume energy at least substantially equal to the available waste heat. For example, supermarkets commonly capture the heat from their chillers and central A/C systems and use it to preheat domestic hot water. However, their domestic hot water consumption is low, and only a small portion of the A/C waste heat is recovered. This is unfortunately often the case.

The laundry industry, however, is unique. The key processes that discharge and employ waste heat occur at temperatures that are compatible with each other, and laundries consume large quantities of water. This presents a unique opportunity to recover a relatively high level of waste heat, materially reduce carbon load, and provide significant financial benefits to the laundry owner. Laundries are extremely energy intensive, so much so that utility costs present an imminent threat to the industry\'s survival. Despite the urgency of its need, the laundry industry has largely fallen under the research radar, and little energy efficiency innovation has occurred to date. Mainstream laundry equipment manufacturers have recently begun to recognize the issue, and have engaged in extensive promotion of ostensibly energy efficient products. However, the improvements offered by these products are incremental and do not offer tangible relief to the industry. This profound stress on the laundry industry, and the nearly total solution vacuum, presents an urgent need for innovation.

The general object of the present invention is to provide an improved heat recovery system particularly adapted for use with clothes dryers and washers in commercial laundries but which may also have broad application in other environments.



In accordance with the present invention and in fulfillment of the foregoing object, the improved heat recovery system takes advantage of two key factors; compatible energy consumption and temperature in the separate processes, and very high water consumption. One function of the disclosed systems is recovery of waste heat from the dryer exhaust. This recovered heat is preferably used for hot water production, and may also be used for heating dryer makeup air and/or for facility space heat. In the event the facility Air Conditioning is water cooled, additional waste heat may be recovered, and Air Conditioning electrical consumption may be materially reduced.


FIG. 1 is a schematic illustration in block diagram form of a conventional commercial Laundromat including a plurality of washers, a plurality of dryers, a boiler and hot water storage tank feeding the washers, a space heating system, and an air conditioning system,

FIG. 2 is a schematic illustration in block diagram form showing the-Laundromat of FIG. 1 equipped with an improved heat recovery system of the present invention,

FIG. 3 is a schematic illustration of a heat recovery unit mounted atop a commercial stacked dryer assembly comprising upper and lower dyer units,

FIG. 4 is schematic illustration of a heat recovery unit on a dryer assembly similar to FIG. 3 but from a different angle,

FIG. 5 is an enlarged fragmentary schematic illustration of a heat recovery unit constructed in accordance with the present invention,

FIG. 6 is an enlarged fragmentary schematic illustration of a heat recovery unit similar to FIG. 5 but with arrows indicating the direction of air flow through the unit,

FIG. 7 is a schematic diagram illustrating the controls for the heat recovery units,

FIG. 8 is a schematic diagram of a “straight through” configuration of the heat exchanger and blower in a recovery unit,

FIG. 9 is a schematic illustration of an overall system which might be installed in a laundry and is similar to FIGS. 1 and 2 but includes additional conduit means,

FIG. 10 is a fragmentary schematic view showing additional conduit means connecting a plurality of dryers to a number of different headers, and

FIG. 11 is a schematic illustration illustrating temperature gradients in a storage tank.

Download full PDF for full patent description/claims.

Advertise on - Rates & Info

You can also Monitor Keywords and Search for tracking patents relating to this Integrated energy recovery systems patent application.
monitor keywords

Keyword Monitor How KEYWORD MONITOR works... a FREE service from FreshPatents
1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored.
3. Each week you receive an email with patent applications related to your keywords.  
Start now! - Receive info on patent apps like Integrated energy recovery systems or other areas of interest.

Previous Patent Application:
Heat disspation device and control method
Next Patent Application:
Method and apparatus for joining members for downhole and high temperature applications
Industry Class:
Heat exchange
Thank you for viewing the Integrated energy recovery systems patent info.
- - - Apple patents, Boeing patents, Google patents, IBM patents, Jabil patents, Coca Cola patents, Motorola patents

Results in 0.56238 seconds

Other interesting categories:
Nokia , SAP , Intel , NIKE , -g2-0.1821

FreshNews promo

stats Patent Info
Application #
US 20120292008 A1
Publish Date
Document #
File Date
Other USPTO Classes
International Class

Follow us on Twitter
twitter icon@FreshPatents