The present system is for simultaneous recovery of purified water and dissolved solids from impure high TDS water (1) which is achieved in a single step and eliminates the use of external thermal energy for making the system significantly efficient. It eliminates the use of boiler, cooling tower that reduces the overall capital cost and continuous requirement of external thermal energy for making system efficient. The simultaneous recovery of the purified water and solids from high TDS input effluent reduce the energy intensity of the system. Said system provides a vacuum system as heat pump which enables the system to be self-sufficient in thermal energy requirements for evaporation process and reduces GHG emissions significantly.

A remote heat transfer device for use with an air handling unit comprises: a vapour-compression circuit, the vapour-compression circuit comprising a first heat exchanger adapted to exchange heat between a refrigerant in the vapour compression circuit and a first heat transfer fluid; and a first outlet arranged to provide the first heat transfer fluid to an air supply passage of the air handling unit, so that the first heat transfer fluid exchanges heat with supply air passing through the air supply passage.

A gas heat pump system is disclosed. The gas heat pump system includes an air conditioning module including a compressor, an outdoor heat exchanger, an expansion device, an indoor heat exchanger and a refrigerant pipe, an engine module including an engine configured to burn a mixture of fuel and air and provide power for operation of the compressor, a cooling module including a cooling water pump configured to generate flow of cooling water for cooling the engine and a cooling water pipe connected to the cooling water pump to guide flow of cooling water. The engine module includes a mixer configured to discharge the mixture of air and fuel to the engine, a supercharger disposed between the mixer and the engine to compress the mixture discharged from the mixer and discharge the mixture to the engine, and an adjuster disposed between the supercharger and the engine to adjust an amount of compressed mixture supplied to the engine.

Hot water heating system comprising one or more water heaters with at least one water heating mechanism, and a heating-control storage tank generally configured to store heated water in a temperature stratified manner where hotter water tends to be separated from cold water. The heating-control storage tank can receive thermal energy or hot water from the water heater, send thermal energy or water to the water heater as its makeup water, and provide hot water directly to end users. The water heater may or may not be used to provide hot water to end users. The system is electronically controlled using a processor, various sensors, a recirculation pump, and electronically actuated valves. Depending on hot water needs and energy costs, the system controls water heating schedule and amount of hot water stored in the heating-control storage tank by changing system operation modes to minimize energy costs while providing reliable service.

Method and device for reducing or eliminating a temperature drop of the supply air temperature during defrost operation, at an air handling unit (1) which is arranged with a heat pump (2) for recovering heat from an extract air stream (3) and transfer to a supply air stream (4). During defrosting of a first DX-coil (5), arranged in the extract air stream (3), by reversible operation of the heat pump (2), accumulated heat energy (E) is used for reduction or elimination of the temperature drop in the supply air temperature during the defrost operation, and which energy has been stored in an accumulator medium (7) which is at least partially in contact with the supply air flow (4). The stored energy (E) is delivered by heat exchange with the supply air stream (4) in a position after a second DX-coil (6) through a heating coil (8) arranged in the supply air stream (4).

The present disclosure provides systems for refrigeration facility cooling and water desalination. In certain aspects, the systems include a refrigeration facility having a water cooling subsystem configured to receive cool water and output warm water and a desalination plant co-located with the refrigeration facility and configured to receive and desalinate the warm water. Aspects of the invention also include methods for cooling a refrigeration facility using a water cooling subsystem and desalinating water with a desalination plant that is co-located with the refrigeration facility.

A device for obtaining water from air on an island includes: a concentrated solution air water obtaining system, a solar collector, a dilute solution dehydration system, a heat pump system, a solution heating system, and a water purification system. Humid air is introduced into the concentrated solution air water obtaining system, which performs a heat and mass transfer into a dilute solution and relatively low-temperature dry air. This air is used as interior fresh air. The diluted solution is heated by the solar collector, delivered to the dilute solution dehydration system, and sent to the solution heating system for heating and evaporating into water vapor. The water purification system cools, purifies, filters and stores the water vapor. At the same time, the heat pump system introduces heated humid air into the dilute solution dehydration system to recover heat contained in the heated humid air, and to extract water.

A control method and control device for a heat pump-type double-circulation hot-air drying system, relating to a device for supplying or controlling air or gas for drying solid materials or products, and in particular to a control method and control device for a heat pump-type hot-air drying system. The method comprises: configuring a temperature control parameter, and saving a preset temperature control curve parameter; detecting and monitoring an outlet air temperature, and the temperature and humidity of a drying room; dynamically adjusting a set temperature according to a preset temperature control curve; and selecting, according to a current set temperature, a double-circulation dynamic operation mode of a system. The control device uses a micro-processor to realize program control. By building an inner circulation loop for large-volume air circulation, the latent heat of condensation in a refrigerant is fully absorbed, to improve the basic air temperature.

A heating system (1) has a turbine (20) for burning a fuel to provide flue gas and electrical energy. A flue gas heat exchanger (25) receives the flue gas and uses it to heat water in three of stages. An air conduit (2) receives inlet air (3) and gases from secondary inlets (5, 26) from within the system to elevate the temperature in the main conduit (2) above ambient. An evaporator (8) recovering heat from the air flow of the main conduit, and provides energy via an evaporator coil to an air source heat pump ASHP (50). A water source heat pump WSHP (60) receives a water feed at an elevated temperature from the ASHP (50), and it cools the flue gas in a third heat exchanger stage (25(c)). Hence, WSW efficiency is high and it provides product water, as do the first and second stages of the flue gas heat exchanger (25)

In a system for air-conditioning interior spaces of a building which are connected via at least one exhaust air duct, one or more interior spaces are provided with an air-conditioning unit which has a inlet line of outdoor air, which supplies inlet air or circulating air to the interior space or spaces, and which is connected to a fluid circuit of a heat pump. The exhaust air duct and a further fluid circuit of the heat pump are connected to an energy store installed outside the building, wherein the energy store is connected to a heat exchanger in a liquid reservoir for energy transfer and for energy storage, which is connected via the heat exchanger to another fluid circuit of the heat pump, the exhaust air being directed into the liquid reservoir via a heat exchanger.