The problem of air conditioning and refrigeration system for a shopping mall is diagnosed in detail. Subsequently, transformation of air conditioning and refrigeration system is carried out. One-time investment, operating costs and payback period of this transformation is analyzed in detail. Result of this transformation shows this transformation is more successful.

No abstract

By describing the environmental requirements for food storage, puts forward the green air conditioning system to create a low-temperature environment for food of these creatures such as ice storage air-conditioning, ground source heat pumps, solar cooling and so on. Combined the related system diagram or schematic in the context of promoting green and healthy, pointed out the future direction of development of the low-temperature grain storage.

To investigate the actual thermal condition in Chinese textile workshop, thermal comfort vote (TCV), actual mean vote (AMV) and thermal acceptability (TA) were carried out in this paper. 41 workers with years of work experience and 23 students with rarely entering into workshop were chosen as the subjects. Though 61% workers and 74% students feel warm or hot in the textile workshop, 24 % workers and 39% students feel very uncomfortable warm or extremely comfortable in the textile workshop, while 100% workers and 96% students were not very resistant to the thermal environment of the textile workshop. Ideally the AMV value should equal to TCV value, in fact only half of the subjects to meet this rule. On average, the TCV value is lower than the AMV value up to 0.6 scale point. Compared to students with rarely entering into the workshop, workers can adapt more easily to the hot and humid environment of the textile workshop.

Takes a field measurement in traffic statistics, indoor and outdoor temperature and humidity, analyzes the thermal environment of the railway station waiting room of Xi’an. Investigates the thermal comfort status using ASHRAE seven sensation scales by questionnaires, survey the people’s satisfaction to the environment of waiting room.