Air conditioning system with multiple energy storage sub-systems
A system and method for separating humidity control from temperature control and utilizing multiple energy storage sub-systems to reduce overall energy consumption, and more generally to cool and dehumidify ambient air using such a multitude of energy storage mediums, including electricity, water, moisture and thermal storage The system uses a primary cooling sub-system such as a vapor compressor in combination with one or more energy storage sub-systems to store energy during one period of operation for later use during another period of operation based on an algorithm that determines the most cost efficient or energy efficient usage.
1. A method of using a moisture storage device, comprising:
charging the moisture storage device which is in thermal communication with a heat exchanger until a humidity ratio determined by measuring a relative humidity and a temperature at an outlet increases to meet a first predetermined humidity ratio threshold;
discharging the moisture device until the humidity ratio at the outlet decreases to meet a second predetermined humidity ratio threshold wherein the heat exchanger is configured to remove a heat of adsorption from the storage device.
2. The method of claim 1 , wherein charging the moisture storage device comprises flowing air having a first relative humidity and a first temperature over a desiccant media such that the desiccant media adsorbs moisture.
3. The method of claim 2 , wherein discharging the moisture storage device comprises flowing air having a second relative humidity and a second temperature over a desiccant media such that the desiccant media desorbs moisture.
4. A method of using a moisture storage device, comprising:
a) providing a gas to a moisture storage device, the gas having a first relative humidity and a first temperature;
b) determining a first humidity ratio of the gas by measuring the first relative humidity and the first temperature;
c) charging the moisture storage device with the gas via an adsorptive process, thereby generating a heat of adsorption;
d) during the charging of c), flowing a liquid at an ambient wet bulb temperature as measured in an ambient atmosphere through a heat exchanger of the moisture storage device;
e) determining a second humidity ratio of the gas by measuring a second relative humidity and a second temperature of the gas while expelling the gas from the moisture storage device, the second humidity ratio being lower than the first humidity ratio.