The invention provides a system for energy distribution that uses liquid carbon dioxide as a working fluid. Evaporation of the carbon dioxide provides cooling, and compression of the carbon dioxide gas back to the liquid state provides heat. The amount of heat transferred at both stages is sufficient to provide environmental heating and cooling. Waste thermal energy from a power plant, in the form of hot water, is fed into the system and used to drive the overall process. An underground thermal energy storage system is used to store energy flowing into the system that is in excess of the current demand.

Disclosed herein is a heat recovery system, in accordance with some embodiments. Accordingly, the heat recovery system may include a chiller, primary heat exchangers, primary pumps, secondary heat exchangers, and secondary pumps. Further, the chiller is configured for providing primary fluid and secondary fluid. Further, the primary heat exchangers are configured for exchanging a first amount of heat between the primary fluid and primary mediums creating a heat deficit and/or a heat excess in the primary mediums. Further, the primary pumps are configured for circulating the primary fluid between the chiller and the primary heat exchangers. Further, the secondary heat exchangers are configured for exchanging a second amount of heat between the secondary fluid and secondary mediums. Further, the secondary pumps are configured for circulating the secondary fluid between the chiller and the secondary heat exchangers.

Disclosed herein is a heat recovery system, in accordance with some embodiments. Accordingly, the heat recovery system may include a chiller, primary heat exchangers, primary pumps, secondary heat exchangers, and secondary pumps. Further, the chiller is configured for providing primary fluid and secondary fluid. Further, the primary heat exchangers are configured for exchanging a first amount of heat between the primary fluid and primary mediums creating a heat deficit and/or a heat excess in the primary mediums. Further, the primary pumps are configured for circulating the primary fluid between the chiller and the primary heat exchangers. Further, the secondary heat exchangers are configured for exchanging a second amount of heat between the secondary fluid and secondary mediums. Further, the secondary pumps are configured for circulating the secondary fluid between the chiller and the secondary heat exchangers.

An energy system includes a turbine flue heat exchanger feeding a storage tank arranged to deliver water on a high temperature (90° C.) line to supply circuits. A heat pump and storage tank are arranged to deliver lower temperature (45° C.) water on a low temperature line to the supply circuits. A number of the supply circuits are each arranged to receive high temperature water, receive low temperature water, and use these flows to deliver a process water supply at a desired high, low or intermediate temperature (65° C.). In some each supply circuits the blending is controlled by control of a low temperature line pump according to temperature of the process outlet. The low temperature tank is supplied by a heat pump the inlet of which is fed by a heat recovery heat exchanger which recovers waste heat from a plant, and so it is more efficient than if it received cold water. Electrical energy for the heat pump is at least partly supplied by the high temperature heater gas turbine. Overall, the system has excellent energy efficiency due to the manner in which waste heat is utilized, improved efficiency of a heat pump, and real time control of the high and low water lines.

There is herein described energy storage systems. More particularly, there is herein described thermal energy storage systems and use of energy storable material such as phase change material in the provision of heating and/or cooling systems in, for example, domestic dwellings.

There is herein described energy storage systems. More particularly, there is herein described thermal energy storage systems and use of energy storable material such as phase change material in the provision of heating and/or cooling systems in, for example, domestic dwellings.

An equipment determination method of a cogeneration system includes the steps of: calculating a total hot water supply load for each day over a predetermined period longer than a specific period based on each unit hot water supply load for hour according to hot water supply use by consumers; setting as a representative period a specific period on which the total hot water supply load becomes at least a low load among the calculated total hot water supply load for each day; determining a capacity of the cogeneration equipment based on the total hot water supply load on the set representative period; and determining a capacity of the plurality of hot water storage tanks based on an amount of hot water supply load exceeding the capacity of the determined cogeneration equipment among each unit hot water supply load for two or more divided periods including the set representative period.

An exemplary system is for a facility including a first heating/cooling zone and a water delivery system configured to deliver domestic water to a point of water use. The system generally includes a facility loop having a facility loop refrigerant flowing therethrough, a first zone heat pump configured to transfer thermal energy between the facility loop refrigerant and the first heating/cooling zone, and a first water-source heat pump configured to transfer thermal energy between domestic water upstream of the point of water use and the facility loop refrigerant.

The invention provides a system for energy distribution that uses liquid carbon dioxide as a working fluid. Evaporation of the carbon dioxide provides cooling, and compression of the carbon dioxide gas back to the liquid state provides heat. The amount of heat transferred at both stages is sufficient to provide environmental heating and cooling. Waste thermal energy from a power plant, in the form of hot water, is fed into the system and used to drive the overall process. An underground thermal energy storage system is used to store energy flowing into the system that is in excess of the current demand.

A method for operating a waste heat steam generator, in particular one designed according to the forced flow principle, having an evaporator, through which a flow medium flows; an economizer having a number of economizer heating surfaces, and having a bypass line, which on the flow medium side is connected in parallel to a number of economizer heating surfaces. A variable that is characteristic of the heat energy supplied to the waste heat steam generator for controlling or regulating the flow rate of the bypass line is used, wherein the regulating or controlling of the flow rate of the flow medium through the bypass line takes place at the inlet of the evaporator subject to a supercooling target value. The regulating or controlling of the flow rate of the flow medium through the bypass line also takes place at the outlet of the evaporator subject to an overheating target value.