48results about How to "Reduce exergy loss" patented technology

A heat pump for heating a vehicle interior includes a compressor arranged in a heat-pump circuit of a working medium, a condenser, a throttle valve and an evaporator. Gaseous working medium is compressed in the compressor. The compressor outlet is connected to the inlet of the condenser in which the working medium condenses, at the same time discharging heat, the heat being delivered as useful heat directly or indirectly to a consumer. The condenser is followed by a jet pump, to which the liquid working medium coming from the condenser is delivered as driving medium and to which the gaseous working medium flowing out from the evaporator is delivered as suction medium, in such a way that the driving medium and suction medium are compressed in the jet pump as a two-phase mixture. The jet-pump outlet is connected to the inlet of a separator, to which the two-phase mixture is delivered and in which the gaseous working medium is separated from the liquid working medium. The gas outlet of the separator is connected to the compressor inlet and the liquid outlet of the separator is connected to the inlet of the throttle valve, the liquid working medium being throttled in the throttle valve, and the outlet of the throttle valve is connected to the inlet of the evaporator, in which, by the supply of heat, phase transformation takes place to the gaseous working medium.

The invention discloses a method for recovering the waste heat of a thermal power plant and heating and supplying heat to hot water in a stepping way. In the method, low-temperature heat-net return water is firstly mixed with circulating cooling water positioned on an outlet of a cooling condenser or exchanges heat with the circulating cooling water positioned on the outlet of the cooling condenser to be increased in temperature and then sequentially delivered into an each-step vapour absorption type heat pump and a vapor-water heat exchanger in a series connection way to be gradually heated to be increased in temperature to heat supplying temperature and finally discharged through a water supplying pipeline; the circulating cooling water absorbs the waste steam condensation heat of a steam turbine in the cooling condenser, then one path of the circulating cooling water is directly mixed with the low-temperature heat-net return water or heats the low-temperature heat-net return water through the heat changer, the other path of the circulating cooling water is delivered into an each-step absorption type heat pump unit to be used as a low-order heat source of the absorption type heat pump unit, and the redundant heat of the circulating cooling water is discharged to the environment through a cooling tower. The invention uses the steam extraction of the steam turbine as a drivingheat source of the absorption type heat pump so that the low-temperature heat-net return water is heated in a stepping way, thereby reducing the effective energy loss; the waste heat of the discharged steam of the steam turbine is sufficiently recovered in a direct heating way and an absorption type heat pump temperature increasing heating way, therefore, the comprehensive energy usage efficiencyof the thermal power plant is enhanced.

The invention relates to a medium-low temperature heat source generating set based on energy cascade utilization and a thermal circulation method thereof. The medium-low temperature heat source generating set comprises a top cycle system assembly and a bottom cycle system assembly connected with the top cycle system assembly. On the basis of the principle of energy cascade utilization, the generating set is formed by connecting two different medium-low temperature heat source generating cycles in parallel, wherein the top cycle is an organic matter Rankine cycle, and the bottom cycle is a Kalina cycle; and the thermal efficiency of the Kalina cycle at the bottom is higher than that of the organic matter Rankine cycle when electricity is generated by using the lower temperature heat sourcedischarged from the top cycle. The invention is more suitable for recycling low-grade heat sources, conforms to the principle of energy cascade utilization as compared with the original technique. Thus, the thermal efficiency of the generating set of the invention is further enhanced.

The invention discloses a power multi-generation system based on a calcium-based compound and used in coal chemical industry. The system comprises a coking unit 1, a calcium carbide unit 2, an acetylene unit 3, a chemical chain reduction and desulfuration unit 4, a chemical chain oxidization unit 5, a roasting unit 6, a water steam reforming hydrogen production unit 7, a gas / steam united circulation unit 8 and a CO2 capture and storage unit 9. According to circular conversion of the system based on the calcium-based compound, efficient energy utilization and substance conversion are achieved.Compared with an existing process, the system directly uses calcium carbide furnace tail gas and coke oven gas as fuel, energy loss is reduced, and the treatment cost is saved; by adopting a chemicalchain combustion adopting mode, the fuel fire loss is reduced, meanwhile CO2 is captured, and greenhouse gas discharge is reduced; carbide slag is used as a desulfurizing agent, a chemical chain combustion oxygen carrier and a reforming hydrogen production absorbent, waste utilization is achieved; fuel gas produced after chemical chain combustion is used for combined cycled power generation, and the power generation efficiency of the system is improved.

The invention discloses a multistage air deep dehumidification device for ultra-low dew point environments. The multistage air deep dehumidification device comprises a first fan, a primary efficiencyfilter, a medium efficiency filter and a first surface air cooler which are sequentially arranged in the outdoor fresh air direction and further comprises a solution dehumidification system, a first fresh air branch circuit, a second fresh air branch circuit, a third fresh air branch circuit, a first air returning branch circuit and a second air returning branch circuit which are arranged behind the first surface air cooler. A cold and heat source of a solution dehumidification cycle is provided by an independent vapor-compression-type refrigeration cycle, a regenerative heat source of two-stage rotary-wheel dehumidification uses condensation heat of another vapor-compression-type refrigeration cycle, and meanwhile shortage of the condensation heat is compensated in an electric heating mode. The evaporative cooling capacity of the vapor-compression-type refrigeration cycles is provided for an air-evaporator to cool air. After treating through the device, the humidity content of the fedair can be lowered to 0.01 g / kg.