FURNACE HEAT EXCHANGER

• US 20120088200A1
• Filed: 09/28/2011
• Published: 04/12/2012
• Est. Priority Date: 10/08/2010
• Status: Abandoned Application

• Current Assignee: Carrier Corporation (Carrier Global Corporation)
• Original Assignee: Carrier Corporation (Carrier Global Corporation)
• Inventors: Haydock, Paul M.
• Application Number:
  US13/247,382
• Publication Number:
  US 20120088200A1
• Time in Patent Office: Days
• US Class Current: 431/202
• CPC Class Codes: F24H 3/105 using fluid fuel
• CPC Class Codes: F24H 8/00 Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
• CPC Class Codes: F27D 17/004 Systems for reclaiming waste heat
• CPC Class Codes: F28D 1/0478 the conduits having a non-circular cross-section
• CPC Class Codes: F28D 2021/0024 for combustion apparatus, e.g. for boilers
• CPC Class Codes: F28D 21/0008 Air heaters
• CPC Class Codes: Y02B 30/00 Energy efficient heating, ventilation or air conditioning [HVAC]

Abstract

A primary heat exchanger for a furnace includes one or more passes and having a heat exchanger height. A ratio of heat exchanger efficiency to heat exchanger height is in the range of about 7.0 points per inch to about 8.1 points per inch. A furnace includes a burner for combusting a fuel and a primary heat exchanger operably connected to the burner. The primary heat exchanger includes one or more passes and has a heat exchanger height. A ratio of heat exchanger efficiency to heat exchanger height is in the range of about 7.0 points per inch to about 8.1 points per inch.

Claims

1. A primary heat exchanger for a furnace comprising one or more passes and having a heat exchanger height wherein a ratio of heat exchanger efficiency to heat exchanger height is in the range of about 7.0 points per inch to about 8.1 points per inch.

2. The primary heat exchanger of claim 1, wherein the furnace has an input rate of about 18,000 to 22,000 BTU per hour.

3. The primary heat exchanger of claim 1, wherein the heat exchanger height is between about 9.5 and 10.7 inches.

4. The primary heat exchanger of claim 1, wherein the one or more passes is three passes.

5. The primary heat exchanger of claim 4, wherein a third pass of the three passes includes a plurality of irregularities extending at least partially along a length of the third pass.

6. The primary heat exchanger of claim 4, wherein a third pass of the three passes is substantially bifurcated.

7. The primary heat exchanger of claim 1, wherein the heat exchanger efficiency is between about 75 percent and 79.4 percent.

8. A furnace comprising:

a burner for combusting a fuel; and

a primary heat exchanger operably connected to the burner including one or more passes and having a heat exchanger height wherein a ratio of heat exchanger efficiency to heat exchanger height is in the range of about 7.0 points per inch to about 8.1 points per inch.

9. The furnace of claim 8, wherein the burner has an input rate of about 18,000 to 22,000 BTU per hour.

10. The furnace of claim 8, wherein the heat exchanger height is between about 9.5 and 10.7 inches.

11. The furnace of claim 8, wherein the one or more passes is three passes.

12. The furnace of claim 11, wherein a third pass of the three passes includes a plurality of irregularities extending at least partially along a length of the third pass.

13. The furnace of claim 11, wherein a third pass of the three passes is substantially bifurcated.

14. The furnace of claim 8, wherein the heat exchanger efficiency is between about 75 percent and 79.4 percent.

15. The furnace of claim 8, wherein the fuel is natural gas or propane.