Heating and cooling cost minimization
First Claim
1. In an air conditioning system having a supply duct and return air and outdoor air dampers to mix the air in said supply duct, a hot deck supplied with air from said supply duct and heating means to heat the air in said hot deck, and a cold deck supplied with air from said supply duct and cooling means to cool the air in said cold deck, a control system for minimizing the cost of the energy to heat the air in the hot deck and cool the air in the cold deck, said control system comprising:
- first means for supplying a first signal dependent upon the amount of heating done in the hot deck;
second means for supplying a second signal dependent upon the amount of cooling done in the cold deck;
weighting means for adjusting the weighting to be given to said first and second signals;
comparison means connected to said first means, said second means and said weighting means for producing an output dependent upon the difference between the amount of cooling and the amount of heating and adjusted for the difference between the relative weighting of the first and second signals;
control means connected to the output of said comparison means and adapted to control the return air and outdoor air damper to control the temperature of the air in the supply duct according to said first and second signal as weighted by said weighting means.
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Accused Products
Abstract
In an air conditioning system having both a hot deck for heating air and a cold deck for cooling air, both decks being supplied by a supply duct, a control system is disclosed for minimizing the total cost of heating the air in the hot deck and cooling the air in the cold deck by measuring the amount of heating done in the hot deck and deriving the heating cost therefrom, measuring the amount of cooling done in the cold deck and deriving the cooling cost therefrom, and controlling the temperature of the air in the supply duct until the heating cost equals the cooling cost to thereby minimize the total heating and cooling costs.
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Citations
21 Claims
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1. In an air conditioning system having a supply duct and return air and outdoor air dampers to mix the air in said supply duct, a hot deck supplied with air from said supply duct and heating means to heat the air in said hot deck, and a cold deck supplied with air from said supply duct and cooling means to cool the air in said cold deck, a control system for minimizing the cost of the energy to heat the air in the hot deck and cool the air in the cold deck, said control system comprising:
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first means for supplying a first signal dependent upon the amount of heating done in the hot deck; second means for supplying a second signal dependent upon the amount of cooling done in the cold deck; weighting means for adjusting the weighting to be given to said first and second signals; comparison means connected to said first means, said second means and said weighting means for producing an output dependent upon the difference between the amount of cooling and the amount of heating and adjusted for the difference between the relative weighting of the first and second signals; control means connected to the output of said comparison means and adapted to control the return air and outdoor air damper to control the temperature of the air in the supply duct according to said first and second signal as weighted by said weighting means. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. In an air conditioning system having a supply duct and return air and outdoor air dampers to mix the air in said supply duct, a hot deck supplied with air from said supply duct and heating means to heat the air in said hot deck, and a cold deck supplied with air from said supply duct and cooling means to cool the air in said cold deck, a control system for minimizing the cost of the energy needed to heat the air in the hot deck and cool the air in the cold deck, said control system comprising:
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first means for measuring the amount of heating done in the hot deck and for producing an output indicative of a cost of heating the air in the hot deck; second means for measuring the amount of cooling done in the cold deck and for producing an output indicative of a cost of cooling the air in the cold deck; comparison means connected to said first and second means to receive said outputs for producing a signal indicating a difference between the cost of heating and the cost of cooling; and
,control means connected to said comparson means and responsive to said signal and adapted to control the return air and outdoor air dampers to control the condition of the air in the supply duct for equalizing the cost of heating and the cost of cooling. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. In an air conditioning system having a supply duct and return air and outdoor air dampers to mix the air in said supply duct, a hot deck supplied with air from said supply duct and heating means to heat the air in said hot deck, and a cold deck supplied with air from said supply duct and cooling means to cool the air in said cold duct, a control system for minimizing the cost of the energy needed to heat the air in the hot deck and cooling the air in the cold deck, said control system comprising:
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first means for measuring the amount of heating done in the hot deck; second means for measuring the amount of cooling done in the cold deck; cost means for generating a signal representing the costs of heating and cooling; comparison means connected to said first means, said second means and said cost means for producing an output dependent upon the difference between the amount of heating and the amount of cooling and adjusted for the difference between the costs of heating and the cost of cooling; control means connected to the output of said comparison means and adapted to control the return air and outdoor air dampers to control the condition of the air in the supply duct for equalizing the cost of heating and the cost of cooling. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification