Spatiotemporal assessment of farm-gate production costs and economic potential of Miscanthus × giganteus, Panicum virgatum L., and Jatropha grown on marginal land in China

Funding Information China Scholarship Council. Grant Number: 201606350028 Biotechnology and Biological Sciences Research Council. Grant Number: BBS/E/W/0012843A Department for Environment, Food and Rural Affairs UK Research Council NERC. Grant Numbers: ADVENT, 1806209, FAB-GGR (NE/P019951/1)Peer reviewedPublisher PD

Driving factors of the thermal efficiency of ground source heat pump systems with vertical boreholes in Chongqing by experiments

Over the past years, the technology of Ground-coupled heat pumps (GCHP) has been utilized in many countries due to its capabilities in providing sustainable heating and cooling. Previous studies in this field have shown that the thermal efficiency of GCHP is closely related to the properties of soil. However, the way in which the system should operate to provide the highest possible energy efficiency considering the thermal characteristics of the soil, needs further investigation. Therefore, the aim of this research is to investigate the factors that influence the energy performance of heat pump system, and to identify the key factors that contribute to the high energy performance of the system. This has been achieved through a series of experimental studies and on-site monitoring and data analysis for GCHP with vertical ground source heat exchanger in Chongqing, China. A set of experiments were set up to assess the influence of variations in the fluid temperature entering the ground heat exchanger, buried depth and operation mode on the energy performance of the GCHP system. The outcomes of this study have shown that, the operation mode and the depth of buried tube have more influence than other factors, intermittent operation mode and 60 m buried tube depth are preferred to choose firstly. Higher inlet temperature, lower inflow velocity and casing/double-U type pipes will help to enhance the energy efficiency of GCHP

Regional innovation and spillover effects of foreign direct investment in China: a threshold approach

Using a data set on twenty-nine Chinese provinces for the period 1985–2008, this paper establishes a threshold model to analyse the relationship between spillover effects of foreign direct investment (FDI) and regional innovation in China. There is clear evidence of double-threshold effects of regional innovation on productivity spillovers from FDI. Specifically, only when the level of regional innovation reaches the minimum innovation threshold will FDI in the region begin to produce positive productivity spillovers. Furthermore, positive productivity spillovers from FDI will be substantial only when the level of regional innovation attains a higher threshold. The double threshold divides Chinese provinces into three super-regions in terms of innovation, with most provinces positioned within the middle-level innovation super-region. Policy implications are discussed

A review of physical supply and EROI of fossil fuels in China

This paper reviews China’s future fossil fuel supply from the perspectives of physical output and net energy output. Comprehensive analyses of physical output of fossil fuels suggest that China’s total oil production will likely reach its peak, at about 230 Mt/year (or 9.6 EJ/year), in 2018; its total gas production will peak at around 350 Bcm/year (or 13.6 EJ/year) in 2040, while coal production will peak at about 4400 Mt/year (or 91.9 EJ/year) around 2020 or so. In terms of the forecast production of these fuels, there are significant differences among current studies. These differences can be mainly explained by different ultimately recoverable resources assumptions, the nature of the models used, and differences in the historical production data. Due to the future constraints on fossil fuels production, a large gap is projected to grow between domestic supply and demand, which will need to be met by increasing imports. Net energy analyses show that both coal and oil and gas production show a steady declining trend of EROI (energy return on investment) due to the depletion of shallow-buried coal resources and conventional oil and gas resources, which is generally consistent with the approaching peaks of physical production of fossil fuels. The peaks of fossil fuels production, coupled with the decline in EROI ratios, are likely to challenge the sustainable development of Chinese society unless new abundant energy resources with high EROI values can be found

Eco city development in China: addressing the policy implementation challenge

Over the last few decades, China has seen a steep rise in diverse eco city and low carbon city policies. Recently, attention has begun to focus on the perceived shortcomings in the practical delivery of related initiatives, with several publications suggesting a gap between ambitious policy goals and the emerging realities of the newly built environment. To probe this further, in this article we examine – based on the policy network approach – how the gap between high-level national policies and local practice implementation can be explained in the current Chinese context. We develop a four-pronged typology of eco city projects based on differential involvement of key (policy) actor groups, followed by a mapping of what are salient policy network relations among these actors in each type. Our analysis suggests that, within the overall framework of national policy, a core axis in the network relations is that between local government and land developers. In some cases, central government agencies– often with buy-in from international architecture, engineering and consulting firms – seek to influence local government planning through various incentives aimed at rendering sustainability a serious consideration. However, this is mostly done in a top-down manner, which overemphasizes a rational, technocratic planning mode while underemphasizing interrelationships among actors. This makes the emergence of a substantial implementation gap in eco city practice an almost predictable outcome. Consequently, we argue that special attention be paid in particular to the close interdependency between the interests of local government actors and those of land and real estate developers. Factoring in this aspect of the policy network is essential if eco city implementation is to gain proper traction on the ground

China's rise: Challenging the North-South technology transfer paradigm for climate change mitigation and low carbon energy

Historically, technology transfer from the global North to China played a large role in renewable energy pathways in China, particularly for wind energy, partly also for solar energy. Yet, the rise of China and other emerging economies means a shift away from a reliance on technology transfer and production capabilities to strengthening indigenous innovation capabilities. Drawing on evidence from the hydropower, solar and wind energy industry in China, the paper introduces the concept of ‘geographies of technology transfer and cooperation’ and challenges the North-South technology transfer and cooperation paradigm for low carbon innovation and climate change mitigation. The empirical evidence shows that for low carbon innovation, the conception that China is lacking behind in innovation capabilities is partly outdated. Instead, there is an increase in indigenous innovation capabilities, resulting in South-South technology transfer and cooperation as well as elements of ‘reverse’ South-North technology cooperation

Environmental impact assessments of the Three Gorges Project in China: issues and interventions

The paper takes China's authoritative Environmental Impact Statement for the Yangzi (Yangtze) Three Gorges Project (TGP) in 1992 as a benchmark against which to evaluate emerging major environmental outcomes since the initial impoundment of the Three Gorges reservoir in 2003. The paper particularly examines five crucial environmental aspects and associated causal factors. The five domains include human resettlement and the carrying capacity of local environments (especially land), water quality, reservoir sedimentation and downstream riverbed erosion, soil erosion, and seismic activity and geological hazards. Lessons from the environmental impact assessments of the TGP are: (1) hydro project planning needs to take place at a broader scale, and a strategic environmental assessment at a broader scale is necessary in advance of individual environmental impact assessments; (2) national policy and planning adjustments need to react quickly to the impact changes of large projects; (3) long-term environmental monitoring systems and joint operations with other large projects in the upstream areas of a river basin should be established, and the cross-impacts of climate change on projects and possible impacts of projects on regional or local climate considered. © 2013 Elsevier B.V.Xibao Xu, Yan Tan, Guishan Yan