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Why Buy a Washer Dryer Heat Pump? If you're seeking a complete washer/dryer look into a heat pump model. Ventless dryers can take a little longer to dry and use more electricity than traditional vented dryers. However, heat-pump tumble dryer are quieter and don't require ducting or venting. They make use of the heat pump loop to move air around and then recirculate the water as it evaporates from the clothes into the drain tube. Learn more about the technology behind these energy STAR certified machines. Evaporative Drying Evaporative drying makes use of hot air to evaporate water and remove the moisture from your clothes. It takes longer to evaporate than dryers which utilize heat. However, as NYC is moving towards a half natural gas energy mix and a greater use of renewable sources of energy over the next 10-20 year you can anticipate an improvement in the efficiency of your dryer. In the case of a washer dryer heat pumps the use of electricity is to draw heat from air and convert it into the heat needed for evaporation. They use less energy and are therefore more efficient. A heat pump dryer operates similar to a conventional dryer however, it includes the air conditioning components of a refrigeration system (evaporator and condenser). The cooling portion of the refrigerant cycle is used to dehumidify the dry air, which then flows through the evaporator in the heat pump. The dryer then re-heats the dry dehumidified air to provide the drying heat. This process generates a significant amount of condensation water which must be removed. This can be done manually, with a drain hose, or by using a special device that removes the water from the air flow into a laundry room sink or tub. Some researchers have studied the effectiveness of heat pumps in drying processes with a concentration on evaluating their performance with respect to the process of dehumidification. One method that can be used to evaluate this is to use exergy analysis. Exergy analysis compares the actual efficiency of a process with its ideal performance. This can be calculated by determining the energy required to achieve the desired outcomes in the process. The ideal scenario is that the process produce energy equal to or greater than the input, but this isn't always feasible particularly in the case of a heat pump dryer. This is due to the fact that a certain amount latent heat from vaporization can be incorporated into the energy of evaporate. Researchers have examined the performance of on a heat pump dryer using a computer simulation. This study suggests that the energy efficiency for a heat pump dryer is dependent on its dehumidification power, the temperature of the air inside the evaporator and the ratio between recirculating air and dry air. Water Condensation Drying If you're looking for a way to dry your clothes more eco-friendly than traditional dryers, you can buy washer dryer heat pumps that make use of water condensation. These units are usually more expensive, but they can be less expensive to operate. The majority of combination washer-dryers that utilize condensation drying work much like traditional tumble dryers, with the exception that they reheat the air that's taken from the clothes, and cool it so that the moisture in the air condenses back into water, which is then taken away. The cooled air is then returned to the drum, where it is heated and evaporated until the clothes are dry. The energy required by these dryers is much less than that used by gas or old-style electric dryers, but they're still more than two times as expensive to run as standard models. Dryers must warm a large portion of the air in order to vent it out. This can be greater than the energy saved by the unit itself, so these washer/dryers are best suited to homes with low energy costs. If you have a laundry area with windows You can save more by connecting the dryer to a drainpipe that connects directly to the outside. This is called ventless drying. If you choose to purchase a dryer that uses this method, ensure to connect it correctly. The connector for the hose at the bottom of the appliance. Usually, you'll also find a holder right next to it. Take the hose off and place the new hose in the holder. Make sure the hose doesn't hang over the holder more than 10cm. This could cause it to be disconnected from the dryer and cease to function. Ventless Dryers Ventless dryers are an excellent alternative for NYC homeowners who reside in homes or apartments that are not compatible with traditional vented dryers. They are more energy efficient and use less gas when compared to vented dryers. They are cost-effective in the long term. They are also smaller and do not need an external vent or duct. You can install a vented dryer in your laundry room or in your home. Ventless dryers employ two methods to dry your clothes, either condensation of air to air or cool water condensation. They extract heat from the air and transfer it to the clothes inside the drum, which means they are more energy efficient than vented dryers. Since they do not rely on hot air to dry your clothes and are therefore more gentle on the fabric. This is important as excessive heat can harm delicate fabrics and cause fade and color bleeding. A heat pump dryer is also more efficient in terms of energy consumption than condensing models. They do this by using an evaporator which converts the air's moisture into water. This is a closed process which means there is no waste. It is crucial to remember that these appliances require regular maintenance to function properly. They should be regularly emptied of any condensed water and cleaned of lint. Some models feature an internal reservoir that has to be emptied regularly, whereas others connect to a drain pipe for automatic water disposal. The lint trap should also be checked and cleaned regularly to maintain the efficiency of the appliance. Energy Efficiency With the cost of energy rising and no sign of relief in sight it is logical for laundry rooms to look ways to cut down on their utility consumption. Replace a standard dryer by an electric heater pump for the washer to cut down on the cost of energy. These systems draw air from outside and employ a refrigerant to draw the heat from the air. It is then pumped through a heat exchanger and converted to heat that can dry clothes. This heat is transferred into the drum of the dryer and then used to power the entire process. The heat is also used to wash. The dryer uses that hot water to drive the spin cycle, further cutting energy consumption and saving money. The system operates in two closed cycles, one for the air and another for the refrigerant. The first utilizes the fan to blow warm outside air over a set of fins on the cold side of the heat pump which absorbs heat energy and then carries it away via coils located on the cold side. The air is then blown over the fins on the hot side to pick up more energy. This process continues throughout the drying process. When the air is saturated with heat, it is passed through another set of coils on the cold side of the pump, and turns into liquid. The liquid is then transported to a compressor that increases the temperature and transforms into gas. The liquid then flows through the dryer, where it evaporates into hot air and dries the clothes. The hot air is then blown out of the dryer, which reduces the energy consumption by a significant amount. The motor that runs the drum of the dryer is the only source of energy left. It consumes a tiny amount of energy throughout the day. These dryers are up to 28 percent more efficient than traditional dryers which have an Energy Star rating around 4.3. This is partly due to the fact that these dryers do not require vents and can operate at the same temperature as your central heating system. The absence of a dryer vent can also lower the cost of installation, and improves the energy efficiency of your home.