good evening and welcome to bbc news. the parents of terminally ill baby charlie gard have confirmed he has died. he was moved to a hospice today from great ormond street hospital. his life support was then withdrawn. the family confirmed the news in a short statement, which said our beautiful little boy has gone. we are so proud of you, charlie . wyre davies has this report. by his side as they have been throughout charlie s short life, chris gard and connie yates fought to keep their son alive but today that fight came to an end. charlie was born last august. he seemed to be a healthy baby boy, but after a few weeks it was clear that something was seriously wrong. he was diagnosed with a very rare genetic condition causing muscle wastage and brain damage. in march of this year, specialists at great ormond street hospital decided that charlie s treatment should be withdrawn. his parents rejected this they said there were doctors in america offering experimental treatment
Air source heat pump is widely used for heating as it has high efficiency and environmentally friendly advantages, but there is frosting issue in low temperature and high humidity conditions. In order to improve the performance of air source heat pump (ASHP) when its evaporator is subject to frosting, a novel ASHP system coupled with liquid-storage gas-liquid separator was proposed in previous work, which was conducted at a constant temperature. However, the environment temperature is variable during the actual operation, the influence mechanism of the temperature change on the dynamic characteristics of the system and operation characteristics is still unclear. Therefore, experimental method is employed in this work, the aim is to investigate the dynamic performance of the novel ASHP in heating and refrigeration modes in actual environment, including suction/exhaust pressure, suction/exhaust temperature, inlet/outlet water temperature, the coefficient of performance (COP) etc. to impr
Temperatures are dropping and the roads can be difficult to navigate in winter. Here are some helpful tips for drivers, cyclists and pedestrians using our roads during the cold weather