With the impact of human activities on the global climate, the climate crisis is becoming more widespread, more severe and almost ubiquitous. As a result of global warming, we are experiencing a range of catastrophic weather and climate events such as heat waves, floods, droughts, forest fires and rising sea levels. Average global temperatures are rising at an unprecedented rate, the likelihood of global warming levels remaining no more than 1.5°C below pre-industrial levels is rapidly decreasing, and the risk of humanity crossing an irreversible tipping point is increasing.In September 2020, China announced to the world its goal of achieving carbon peaking by 2030 and carbon neutrality by 2060. This is not only a national policy to actively address climate change, but also a national strategy based on scientific evidence, both a realistic goal for action and a visionary long-term development strategy.What is “carbon peaking” and “carbon neutrality”? Carbon neutral means that the net increase in carbon emissions necessary for human economic and social activities is captured and utilised through forest carbon sinks and other artificial technologies or engineering means, or sequestered, so that the net increase in greenhouse gas emissions into the atmosphere is zero.The Paris Agreement sets a target for Parties to the UN Framework Convention on Climate Change to make immediate, nationally owned contributions to climate change mitigation, to peak carbon emissions as soon as possible, to achieve carbon neutrality by the second half of the century, and to limit the increase in global surface temperature to less than 2°C relative to pre-industrial levels by the end of the century. Not only that, but Parties will also work towards a temperature control target of 1.5°C.At present, the global average surface temperature has increased by more than 1°C, and China is warming at a rate higher than the global average. If warming continues at the current rate, the global temperature increase could reach 1.5°C by 2030-2052.Current global warming is already leading to increasing climate risks and climate change is a global issue for humanity. As a result, most developed countries have specified a timeline for carbon neutrality after achieving peak carbon emissions. For example, Finland confirms 2035, and countries such as Sweden, Austria and Iceland achieve net zero emissions by 2045; the European Union, the UK, Norway, Canada and Japan have set the timeline for carbon neutrality at 2050. Some developing countries, such as Chile, also plan to be carbon neutral by 2050.Given that around 30 billion tonnes of carbon dioxide are produced globally every year, we humans must gradually reduce the use of primary energy sources such as chemical energy and replace them with clean energy, so heat pumps and air conditioning become the protagonists of the energy supply in the 21st century.

1. Find a suitable placeSeize the basic three elements: unobstructed fresh air, power supply in line with the unit, and circulation flow in line with the unit. Inverter pool heat pump units should be installed in outdoor ventilated and easy to maintain places, not in narrow airless spaces; at the same time, the unit should be kept at a certain distance from the surroundings to keep the air flowing smoothly, and no debris should be stacked in the position of the inlet and outlet of the unit to avoid reducing the heating efficiency of the unit.2. Prepare the basic elementsSwimming Pool \ Chlorination \ Circulation \ Water Pump \ Sand Filter \ Inverter Pool Heat Pump3. Notes on the connection process1)Install the air source heat pump pool unit downstream of all filtration units and pool pumps, and upstream of all chlorine generators, ozone generators, and chemical disinfection. The inlet and outlet pipes can be made directly from PVC pipes;2) Normally, the air source heat pump pool unit should be installed within 7.5 metres from the pool, and it is recommended to pack 10mm thick insulation pipes if the pool water pipes are too long to avoid excessive heat loss from the unit and resulting in insufficient heat production;3) The waterway system should be designed to install a live connection or flange on the inlet and outlet of the heat pump to facilitate drainage in winter and to be used as an access port during maintenance;4) Shorten the water pipeline as much as possible, avoid or reduce unnecessary pipeline changes to reduce resistance losses, and install an exhaust pipe at the highest position of the water main pipeline to facilitate timely evacuation when there is gas in the water pipeline; install a water release valve at the lowest point of the system to facilitate water release when cleaning the system.5) The water system must be equipped with a pump of suitable flow and head to ensure that the water flow meets the requirements of the unit. The water pump should be connected to the unit and the water system pipeline by anti-vibration flexible joints, and should also set up its own bracket to avoid stress on the unit.6) The water side of the heat exchanger is designed to withstand a water pressure of 0.4 Mpa. To prevent damage to the heat exchanger, it must not be used at excessive pressure.7)During the operation of the heat pump, the air temperature will be lowered by about 5 degrees and condensation will be generated on the evaporator fins and will fall onto the chassis and be discharged through the plastic drainage nozzle installed on the chassis, which is a normal phenomenon (condensation is easily mistaken for water leakage in the heat pump water system), and a drainage pipe must be installed to discharge the condensation in time.8)Do not connect the tap water pipe or other water pipes to the circulation pipe, so as not to cause damage to the circulation pipe and the heat pump unit.9)The water tank of the hot water heating system needs to have good insulation performance, please do not install the water tank in a place where there is pollution and corrosive gas.4. Requirements for the power supply.1) The socket must be reliably grounded and the capacity of the power socket should meet the current power requirements of the main unit.2) Do not place other electrical equipment around the power socket of the unit to avoid tripping of the leakage protection plug.3) Install the water temperature sensor probe into the probe tube in the middle of the water tank and fix it.5. Aftercare and maintenanceInverter pool heat pumps are highly automated equipment, and the reliability and service life of the unit will be unexpectedly improved if the unit is regularly checked for condition and if long-term and effective maintenance and servicing is carried out.

As accurate house heat load calculations need to be done in professional heat load simulation software, if you have a team of engineers, it is recommended to simulate the calculations based on local climatic conditions, usage scenarios and other data, using EnergyPlus, OpenStudio and SketchUp together is recommended.To facilitate the calculations, we only use simple mathematical formulas for the calculations, which have a large error but do not deviate much from the actual use. According to the heat transfer equation as follows.Qnp=Qn(tn-tp)/( tn-twn)Where.Qnp – average heating heat load, KW.Qn – heating design heat load, kW;tn – interior design temperature, °C, 18 °C is preferredtp-average outdoor temperature during the heating period, °Ctwn – calculated outdoor temperature during the heating period, °C.In general, the doors and windows of a house, the walls dissipate heat in winter, and how much heat is lost must be compensated, otherwise the room temperature will drop.In the case of general insulation, i.e. where there is no special insulation in the house, where the doors and windows are closed in general, and where the indoor air flow is general, the following empirical values are obtained.1) Average winter temperatures in the range -30°C to -11°C: the average heat load per square metre can be taken as 80-120W2) For an average winter temperature of -10°C to 15°C: the average heat load per square metre can be taken from 60 to 100W(Also: the average heat load factor is the ratio of the average heat load to the maximum heat load for a year or a heating period)For example: if you live in Prague, Czech Republic, then we know that the average winter temperature in Prague ranges from -3°C to 3°C, we can take the value of 100 W/m2. to heat a 120 m2 house you need a total heating capacity heat of 100*120 = 12 kW, which means that you need a rated heating capacity of 12 kW or even more than 12 kW for your residential heat pump. This means that you need a heat pump with a rated heating capacity of 12 kW or even more.