Refrigeration – Processes – Exchanging heat between plural systems – e.g. – disparate
Reexamination Certificate
2000-12-01
2002-01-15
Tapolcal, William E. (Department: 3744)
Refrigeration
Processes
Exchanging heat between plural systems, e.g., disparate
C062S090000
Reexamination Certificate
active
06338254
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention pertains to a novel method of dehumidifying an environment, which includes a refrigeration system and an air conditioning system while reducing the operational cost.
2. Description of the Related Art
Prior art systems have used refrigeration systems condensers to reheat the environment. This approach utilizes the heat which would normally be rejected to the outside environment to heat the inside environment. The Hy-Dry system sold by DTE Energy utilizes the liquid line from an air conditioning system to heat the air after it has passed over the cooling coil and air conditioning system's liquid is sub-cooled in the process. This allows the unit to discharge air at a higher temperature causing a lower net ejected humidity. Although, in this situation dehumidification may or may not take place there is no change in the coefficient of performance of the over all system other than that which is due to enlarging the heat transfer surface. That is, the same effect could be generated by simply increasing the cooling coil surface. While other prior art systems have used desiccant wheels or they have operated the reheat, which in turn causes the air conditioning to turn on and remove the moisture. In the later cases the net result is at an added operational cost.
OBJECTIVES AND ADVANTAGES OF THE INVENTION
Table of Functions, Purposes, Objectives, Goals, Tasks
OBJECTIVE
SOLUTION
REFRIGERATION LIQUID IS
PASS AIR FROM THE CONDI-
SUB-COOLED
TIONED ENVIRONMENT OVER
THE SUB-COOLING COIL OR PASS
A SECONDARY FLUID OVER THE
LIQUID AND THEN THROUGH THE
CONDITIONED ENVIRONMENTS
AND FURTHER SUB-COOL THE
LIQUID WITH A HEAT EX-
CHANGER ON THE AIR
CONDITIONER
LOWER ENERGY COST OF
SUB-COOL THE LIQUID WITH A
THE REFRIGERATION
COMPRESSOR OPERATING AT AIR
SYSTEM IS ACHIEVED BY
CONDITIONING EFFICIENCY THE
REMOVING PART OF THE
LATENT LOAD ON THE REFRIG-
ENERGY AT LESS COST
ERATION SYSTEM IS REDUCED
DUE TO THE LOWER HUMIDITY IN
THE REFRIGERATED
ENVIORNMENT
DEHUMIDIFICATION IS
BY HEATING CONDITIONED
ACHIEVED
ENVIRONMENT AIR WITH THE
WARM LIQUID AND CAUSING THE
AIR CONDITIONING COMPRESSOR
TO OPERATE
LOWER HUMIDITY IN THE
PASS AIR OVER THE A/C COIL
DISCHARGE AIR DUCT
FIRST AND THEN PASS THE AIR
WHICH RESULTS IN LESS
OVER THE SUB-COOLING HEAT
FAVORABLE ENVIRON-
FOR EXCHANGER
MENT FUNGUS GROWTH
REFERENCES:
patent: 3165903 (1965-01-01), Roc et al.
patent: 4819444 (1989-04-01), Meckler
patent: 5105633 (1992-04-01), Briggs
patent: 5686579 (1997-11-01), Vaynberg
patent: 5953926 (1999-09-01), Dressler et al.
Item 001A Product Brief Hy-Dry System Introduction and Summary of Test Results.
Item 001B Effect of the Hy-Dry System on a DX Air-Conditioning Economic Analysis and Conclusions.
Item 002 Service Session Humidity Removal in Supermarkets by John Tomczyk, Reprinted from Refrigeration Service & Contracting copyright 1996.
Item 003 Leaving Humidity Hy-Dry.
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