Experimental studies of energy efficiency of heat pump equipment for hot water supply and air conditioning systems in apartment buildings

Experimental studies of this article are aimed at solving the problem of reforming the housing and communal services of Russia through rational integration of non-traditional energy sources and secondary energy resources into the energy balance of buildings and structures. An important component of the work was the creation and development of industrial production of reliable competitive heat pump systems of a new generation, cogenerating heat energy and cold in an autonomous mode and providing energy savings of at least 50% due to the combined use of low-potential thermal energy of the soil, the atmospheric air and the exhaust air of ventilation systems for hot water supply and air conditioning systems of apartment buildings.

Methods of Designing Engineering Systems While Operating on a Low Potential Source of Energy

Постановка задачи. Необходимо разработать методику проектирования систем кондиционирования и теплоснабжения, работающих в течение длительного периода на основе вертикальной геотермальной скважины. Результаты. Приводится описание и порядок действий предложенной методики проектирования для расчета основных параметров систем кондиционирования и теплоснабжения. Выводы. Предложена методика проектирования систем кондиционирования и теплоснабжения на основе низкопотенциального источника энергии. Она позволяет максимально точно произвести расчет необходимого количества геотермальных скважин с учетом технологических особенностей работы инженерных систем, что обеспечивает минимизацию суммы капитальных и эксплуатационных вложений в установку теплонасосного оборудования и его комплектующих. Statement of the problem. It is important to develop a method of designing air conditioning and heating systems operating for a long period using a vertical geothermal well. Results. The description and the order of actions of the suggested design technique for calculation of the basic parameters of systems of conditioning and heat supply is provided. Conclusions. A method for designing air conditioning and heating systems based on a low-potential energy source is set forth. It enables one to calculate the required number of geothermal wells as accurately as possible considering the technological features of engineering systems, which minimizes the amount of capital and operational investments into the installation of heat pump equipment and its components.

COMPUTATIONAL SIMULATION OF THE EVAPORTIVE AIR COOLING PROCESS IN A SUBWAY TUNNEL

The paper shows the possibility of using evaporative cooling of air by spraying water directly in the tunnel. The solution of the problem of modeling the process of removing heat excess from the air during the phase transition of water from the liquid state to the gaseous in the conditions of the metro tunnel is carried out. It is shown that using method significantly reduces the requirements for ventilation equipment in comparison with the method of removing heat surpluses only by mechanical ventilation. When using evaporative cooling method of removing heat surpluses in a subway tunnel, the maximum air flow rate of one fan will be 67.5 m/s with 104 kW power, the power of the pump equipment will be nearly 50 kW, with a water flow rate 1.5 m per hour. When removing heat surpluses only by ventilation, the air flow rate of one fan (with two fans in parallel work) will be up to 269 m/s, and the power will be 727 kW.

TECHNIQUE FOR DESIGNING ENGINEERING SYSTEMS WHEN OPERATING ON A LOW-POTENTIAL ENERGY SOURCE

Statement of the problem. To develop a design methodology for air conditioning and heat supply systems operating for a long period on the basis of a vertical geothermal well. Results. A description and procedure of the proposed design methodology for calculating the main parameters of air conditioning and heat supply systems are given.Conclusions. As a result of the study, a methodology for designing air conditioning and heat supply systems based on a low-potential energy source (NIE) was proposed. It allows you to calculate the required number of geothermal wells as accurately as possible, taking into account the technological features of the operation of engineering systems, which allows you to minimize the amount of capital and operational investments for the installation of heat pump equipment and its components.

OPERATION CONDITIONS IMPACT OF SUBMERSIBLE PUMP EQUIPMENT UPON ITS WORKING CAPACITY

The matters of life of submersible pump equipment used in petroleum industry to support seam pressure are under consideration. On the basis of the investigations carried out the purpose of which was equipment quality increase including the fulfillment of essential industrial modification of certain pump designs there are revealed reasons which result in working capacity loss of this equipment and there are also offered ways for the solution of the problems accrued. For the first time there is created a comparative classification of ECPK pump equipment of different manufacturers including that of PC ”GMS Livhydromach”, and also on the basis of the statistics of submersible pump equipment operation for oil production from the places of its operation their critical analysis is fulfilled. According to the investigation results there is made a conclusion of that to achieve a guaranteed resource life of 365 days and more for the pumps of the 2ECPK type in consumer holes it is necessary to perform a complex of measures directed to the correct choice of operation conditions and correct constituent operation of units; to the optimization of pump equipment operation including a general hydraulic system and also technical maintenance and repair; to the development of design solutions able to reduce to minimum the impact of negative operation factors.