scholarly journals Impacts of temperature and humidity changes on air‐conditioning design load under the climate change conditions in different climate zones of China

2021 ◽  
Vol 28 (5) ◽  
Author(s):  
Jingfu Cao ◽  
Mingcai Li ◽  
Min Wang ◽  
Bojia Li
Keyword(s):  
Climate Change ◽  
Air Conditioning ◽  
Climate Zones ◽  
Design Load ◽  
Temperature And Humidity

scholarly journals ANALYSIS OF THE USE OF THE AIR CONDITIONING SYSTEM TAKING INTO ACCOUNT THE TEN-YEAR CLIMATE CHANGE IN THE CITY OF SEVASTOPOL

2021 ◽  
Vol 7 (3(84)) ◽  
pp. 34-38
Author(s):  
S. Efremov ◽  
V. Timofeev ◽  
A. Gonchar
Keyword(s):  
Climate Change ◽  
Boundary Conditions ◽  
Air Conditioning ◽  
Temperature Shift ◽  
Air Conditioning System ◽  
Temperature And Humidity ◽  
Air Conditioning Systems ◽  
Duration Of Operation ◽  
The City

The analysis of the temperature and humidity characteristics of the air in the city of Sevastopol during the period 2009...2019. Based on the results of the average monthly readings of eight parameters, a temperature shift was revealed, which allowed us to establish the boundary conditions for the operation of the air conditioning system, both in summer and winter modes. The analysis allowed us to determine the timing of the commissioning of the air conditioning systems and the duration of operation.

scholarly journals Optimization method of hourly heat load calculation model for heat storage air-conditioning heating system in different climate zones

2021 ◽  
pp. 014459872110052
Author(s):  
Yuechao Liu ◽  
Dong Guo ◽  
Min Zhou ◽  
Shanshan Wu ◽  
Dongmei Li
Keyword(s):  
Heat Load ◽  
Air Conditioning ◽  
Heat Storage ◽  
Heating System ◽  
Optimization Method ◽  
Calculation Model ◽  
Climate Zones ◽  
Load Calculation ◽  
Typical Day ◽  
Additional Coefficient

One optimization method of hourly heat load calculation model for heat storage air-conditioning heating system in different climate zones was proposed. A building model is initially built in six different climate zones. Subsequently, the hourly heat load and steady-state design heat load in different climate zones were analyzed. Simultaneously, the hourly heat load additional coefficient of the air-conditioning system with different heating modes on a typical day was compared. It can be found that steady-state design heat load on a typical day is mostly between the peak load and average load of the air-conditioning heating system. Simultaneously, results indicate that the hourly heat load additional coefficient in each climate zone can be fitted to different exponential functions. When the heat storage capacity of building components was changed, the maximum increase of the hourly heat load additional coefficient of the air-conditioning system with intermittent heating was 5%. Thus, the research of the optimal design of hourly heat load calculation method provides a relative reference for performance improvement of the heat storage air-conditioning heating system.

Heat-related mortality under climate change and the impact of adaptation through air conditioning: A case study from Thessaloniki, Greece

2021 ◽  
pp. 111285
Author(s):  
Panayiotis Kouis ◽  
Kyriaki Psistaki ◽  
George Yiallouros ◽  
Antonis Michanikou ◽  
Maria G. Kakkoura ◽  
...  
Keyword(s):  
Climate Change ◽  
Air Conditioning ◽  
The Impact ◽  
Related Mortality

Evolution of climate zones for building in Spain in the face of climate change

2021 ◽  
pp. 103223
Author(s):  
Carmen Díaz-López ◽  
Konstantin Verichev ◽  
Juan A. Holgado-Terriza ◽  
Montserrat Zamorano
Keyword(s):  
Climate Change ◽  
Climate Zones ◽  
The Face

A review of intervention methods used to reduce flying-fox mortalities in heat stress events

2021 ◽  
Vol 43 (2) ◽  
pp. 137
Author(s):  
Matthew Mo ◽  
Mike Roache
Keyword(s):  
Climate Change ◽  
Systematic Review ◽  
Heat Stress ◽  
Evidence Based ◽  
Evaporative Heat Loss ◽  
Temperature And Humidity ◽  
Intervention Trials ◽  
Individual Scale ◽  
The Relationship ◽  
Flying Fox

Heat stress events in Australian flying-fox camps have resulted in significant numbers of flying-fox deaths. The frequency and intensity of such events have increased in recent decades, attributed to anthropogenic climate change. Evidence-based interventions are required to address this growing threat. Responders currently use different combinations of a range of intervention methods. We undertook a systematic review of heat stress interventions, which we classified as either ‘camp-scale’ or ‘individual-scale’. Camp-scale interventions included manual and automated misting of roost vegetation, whereas individual-scale interventions included spraying individual animals or removing them for intensive cooling and rehydration procedures. Our study showed that to date, evaluation of the efficacy of heat stress interventions has been largely anecdotal rather than empirical. This highlights the need for dedicated rigorous studies to evaluate the effectiveness of all the intervention methods described here. It will be especially important to understand the relationship between camp temperature and humidity levels and their influence on flying-foxes’ ability to regulate their body temperature, because high relative humidity reduces the ability of mammals to cool themselves using evaporative heat loss. The development of biophysiological measures such as temperature and humidity indices for different flying-fox species would enable meaningful interpretations of intervention trials under controlled conditions.

scholarly journals Economic Multiple Model Predictive Control for HVAC Systems - A Case Study for a Food Manufacturer in Germany

2018 ◽  
Author(s):  
Tobias Heidrich ◽  
Jonathan Grobe ◽  
Henning Meschede ◽  
Jens Hesselbach
Keyword(s):  
Model Predictive Control ◽  
Predictive Control ◽  
Air Conditioning ◽  
Variable Temperature ◽  
Conveyor Belt ◽  
Electricity Price ◽  
Multiple Model ◽  
Air Conditioning System ◽  
Discrete State ◽  
Temperature And Humidity

The following paper describes an economical, multiple model predictive control (EMMPC) for an air conditioning system of a confectionery manufacturer in Germany. The application consists of a packaging hall for chocolate bars, in which a new local conveyor belt air conditioning system is used and thus the temperature and humidity limits in the hall can be significantly extended. The EMMPC calculates the optimum energy or cost humidity and temperature set points in the hall. For this purpose, time-discrete state space models and an economic objective function with which it is possible to react to flexible electricity prices in a cost-optimised manner are created. A possible future electricity price model for Germany with a flexible EEG levy was used as a flexible electricity price. The flexibility potential is determined by variable temperature and humidity limits in the hall, which are oriented towards the comfort field for easily working persons, and the building mass. The building mass of the created room model is used as a thermal energy store. Considering electricity price and weather forecasts as well as internal, production plan-dependent load forecasts, the model predictive controller directly controls the heating and cooling register and the humidifier of the air conditioning system.

scholarly journals Calculation of Water Evaporative Cooling Systems in Animal Husbandry

2020 ◽  
pp. 35-38
Author(s):  
N.N. Novikov ◽  
Keyword(s):  
Air Conditioning ◽  
Evaporation Rate ◽  
Evaporative Cooling ◽  
Animal Husbandry ◽  
Water Evaporation ◽  
Cooling Systems ◽  
Temperature And Humidity ◽  
Hot Weather ◽  
Livestock Building ◽  
Air Exchange

A method for calculating the parameters of the microclimate in a livestock building using water-evaporative air conditioning is described. It makes it possible to choose a rational temperature and humidity conditions for a room in hot weather, calculate the required air exchange, water evaporation rate and select the appropriate equipment.

scholarly journals Perception and Adaptation Strategies of Dairy Farmers Towards Climate Variability and Change in West Africa

2021 ◽  
Author(s):  
Marthe Montcho ◽  
Elie Antoine Padonou ◽  
Marlise Montcho ◽  
Meshack Nzesei Mutua ◽  
Brice Sinsin
Keyword(s):  
Climate Change ◽  
Climate Variability ◽  
West Africa ◽  
Milk Production ◽  
Adaptation Strategies ◽  
Dairy Production ◽  
Climate Variability And Change ◽  
Dairy Farmers ◽  
Climate Zones ◽  
Fodder Production

Abstract In West Africa, dairy production plays a vital role in the economy and the wellbeing of the population. Currently, dairy production has become vulnerable due to climate variability. The main objective of this study was to investigate dairy farmers’ perceptions and adaptation strategies towards climate change in West Africa. Individual interview and Focus Group Discussions were conducted among 900 dairy farmers. Descriptive statistics and Chi-square test were used to assess dairy farmers’ perception on climate change. Multiple Correspondence Analysis and hierarchical clustering on principal component analysis were used to access the adaptation strategies of dairy farmers. The results revealed that dairy farmers perceived a decrease in the rainy season and the annual rainfall but an increase of the dry season and the annual temperature that affect their activities. Dairy farmers that fed the cattle mainly with natural pastures, crops residues and agroindustrial by-products in the climate zones of Benin, Burkina Faso and Niger, used as climate change adaptation strategies, transhumance in wetland, animal manure to improve fodder production and quality; plants to improve milk production, milk conservation and to treat animal diseases. They sold milk or produced local cheese with the remaining unsold milk. They use crops residues, mineral supplements, herd size reduction; water supply with community pastoral wells and dams, purchase water. Dairy farmers that mainly invested in fodder production and conservation in the climate zones of Mali, sold milk produced to dairies and cheese production units; used plants to improve milk production, pasteurization for milk conservation and veterinary service for animal care. This study provided relevant information for West African policymakers in designing appropriate policies and programs to assist dairy farmers to improve milk production under climate variability and change.

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