SHAP VHR Development of Prototype

随着新建筑按照更高的能源标准建造，变得更加密闭，自然通风的手段消失了。为了克服这一点，经常使用机械通气。这可能导致一个典型的家庭每年损失高达5,000千瓦时的热量。为了“回收”这些能量，通常会增加热回收，有些型号的效率高达90%。由于两个风扇每天24小时运行，这种系统通常每年使用高达700千瓦时的电力（比新冰箱多三倍）。在使用气体加热的情况下，机械热回收通风总是提供很少或没有净CO2节省。除了能源使用，机械系统的安装成本很高。由于它们的复杂性，它们需要大量的交易来安装和维护，并且遭受组件故障。这进一步增加了运行成本，平均每年可达100英镑。机械系统还依赖于许多电子和机械部件，导致可靠性不足，资源消耗和未来的电子废物。从我们的创新和改造特定的被动通风与热回收开始（利用被动烟囱效应和风力辅助），我们设计了可靠的通风系统，为温暖的气候进行了原型设计和测试。该系统结合了多项关于被动式抽气提升、抽气周期延长、水分排出和简化安装的发明。所提出的系统（SHAP VHR）克服了与被动式烟囱通风相关的主要问题，例如夏季运行，并使产品适用于温暖气候，大大增加了其出口潜力。这项技术的发展也将使我们能够提供一个全屋系统，这是BRE和LABC都喜欢的一个提议

As new buildings are built to higher energy standards and become more airtight, naturalmeans of ventilation disappear. To overcome this, Mechanical Ventilation is often used. Thiscan lead to up to 5,000 kWh of heat loss from a typical home per year. In order to ‘reclaim’this energy, Heat Recovery is often added, with some models achieving up to 90% efficiency.With two fans running, 24h a day, such systems typically use up to 700kWh of electricity peryear (three times more than a new fridge). In cases where gas heating is used, MechanicalHeat Recovery Ventilation invariably provides either very little or no net CO2 saving.Besides the energy use, mechanical systems have high installation costs. Due to theircomplexity, they require a number of trades to install and maintain, and suffer fromcomponent failures. This further adds to the running costs, which can average £100 per year.Mechanical systems also depend on a number of electronic and mechanical componentscontributing to lack of reliability, resource depletion and future electronic waste.Starting off with our innovative and retrofit specific Passive Ventilation with Heat Recovery(utilising passive stack effect and wind assistance), we have designed, prototyped and tested areliable ventilation system for warmer climates. This incorporates a number of inventionsaround passive extraction boost, extraction period extension, moisture withdrawal andsimplified installation.The proposed system (SHAP VHR) overcomes the main issues associated with Passive StackVentilation, such us summer operation, and makes the product applicable to warmer climates,greatly increasing its export potential. The development of this technology will also allow usto provide a full house system, a proposition preferred by both BRE and LABC